Cranes — Tolerances for wheels and travel ... -...

© ISO 2012

Cranes — Tolerances for wheels and travel and traversing tracks —Part 1: GeneralAppareils de levage à charge suspendue — Tolérances des galets et des voies de translation et de direction —

Partie 1: Généralités

INTERNATIONAL STANDARD

ISO12488-1

Second edition2012-07-01

Reference numberISO 12488-1:2012(E)

Copyright International Organization for Standardization Provided by IHS under license with ISO

Not for ResaleNo reproduction or networking permitted without license from IHS

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ISO 12488-1:2012(E)

ii © ISO 2012 – All rights reserved

COPYRIGHT PROTECTED DOCUMENT

© ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s member body in the country of the requester.

ISO copyright officeCase postale 56 • CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail [email protected] www.iso.org

Published in Switzerland



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ISO 12488-1:2012(E)

© ISO 2012 – All rights reserved iii

Contents Page

Foreword ............................................................................................................................................................................ iv

Introduction ........................................................................................................................................................................ v

1 Scope ...................................................................................................................................................................... 1

2 Normative references ......................................................................................................................................... 1

3 Termsanddefinitions ......................................................................................................................................... 1

4 Symbols ................................................................................................................................................................. 2

5 Classificationoftolerances .............................................................................................................................. 3

6 Tolerances ............................................................................................................................................................. 36.1 General ................................................................................................................................................................... 36.2 Thermal effects .................................................................................................................................................... 36.3 Application of vertical out-of-plane tolerance ............................................................................................. 36.4 Construction tolerances .................................................................................................................................... 46.5 Operational tolerances ....................................................................................................................................... 4

Bibliography .....................................................................................................................................................................20



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ISO 12488-1:2012(E)

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 12488-1 was prepared by Technical Committee ISO/TC 96, Cranes, Subcommittee SC 8, Jib cranes.

This second edition cancels and replaces the first edition (ISO 12488-1:2005), which has been technically revised. It also incorporates the Technical Corrigendum ISO 12488-1:2005/Cor 1:2008.

ISO 12488 consists of the following parts, under the general title Cranes — Tolerances for wheels and travel and traversing tracks:

— Part 1: General

— Part 4: Jib cranes

iv © ISO 2012 – All rights reservedCopyright International Organization for Standardization Provided by IHS under license with ISO


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ISO 12488-1:2012(E)

Introduction

This part of ISO 12488 establishes requirements and gives guidance and design rules that reflect the present state of the art in the field of crane machine design. The rules given represent good design practice that ensures fulfilment of essential safety requirements and adequate service life of components. Deviation from these rules normally leads to increased risks or reduction of service life, but it is acknowledged that new technical innovations, materials etc. may provide new solutions that result in equal or improved safety and durability.

© ISO 2012 – All rights reserved vCopyright International Organization for Standardization Provided by IHS under license with ISO


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Cranes — Tolerances for wheels and travel and traversing tracks —

Part 1: General

1 Scope

This part of ISO 12488 specifies tolerances for construction assemblies and operational conditions of cranes and associated crane tracks as defined in ISO 4306-1. The purpose of the requirements in this part of ISO 12488 is to promote safe operation and achievement of the expected life of components by the elimination of excessive load effects due to deviations or misalignments from the normal dimensions of the structure.

Tolerances given are extreme values. The elastic deformations due to load effects are outside the scope of this part of ISO 12488. These will need to be taken into account at the design stage using other criteria to achieve the intended operation and performance.

Specific values for particular crane types are given in other parts of ISO 12488.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 286-2, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes — Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts

ISO 1101, Geometrical Product Specifications (GPS) — Geometrical tolerancing — Tolerances of form, orientation, location and run-out

ISO 4306-1, Cranes — Vocabulary — Part 1: General

3 Termsanddefinitions

For the purposes of this document, the following terms and definitions apply.

3.1construction toleranceamount by which a specific dimension is permitted to vary, resulting from the assembly of the complete crane and its tracks, in new, modified, rebuilt or repaired buildings, before operational use

NOTE 1 This applies to new build or repaired or modified cranes and tracks.

NOTE 2 The amount is given either by the absolute value of the difference between the limits of size, or by the allowable geometric variation.

3.2operational toleranceamount by which a specific dimension is permitted to vary, resulting from the use of the crane and its tracks

NOTE The amount is given either by the absolute value of the difference between the limits of size, or by the allowable geometric variation.

INTERNATIONAL STANDARD ISO 12488-1:2012(E)

© ISO 2012 – All rights reserved 1Copyright International Organization for Standardization Provided by IHS under license with ISO


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ISO 12488-1:2012(E)

4 Symbols

A Tolerance of the span, related to the rail centre of travelling or traversing tracks, at each point of the track or to the wheel centre of crabs or cranes

B Tolerance of the horizontal straightness, in ground plan, at each point of the travelling track

b Tolerance of horizontal straightness related to a test length of 2 m in ground plan, (sample value) at each point of the rail head

C Tolerance of straightness related to the height of the crane rail centre at each point of the travelling track

c Tolerance of straightness related to a test length of 2 m (sample value) at each point of height of the crane rail

a Centre-to-centre distance between the horizontal guide rollers, in longitudinal direction of rail

e Centre-to-centre distance between two wheels or bogeys, in longitudinal direction of rail

hF Distance between the top edge of a rail and the bottom edge of horizontal guide rollers

S Span from centre to centre of the rail

0/00 Angle of inclination expressed as vertical points per horizontal thousand

D Wheel diameter

E Height tolerance related to opposite measuring points at right angles to each point of the track

F Parallelism tolerance of end stops or buffers

G Angularity tolerance related to rail cross-section with plane surface

HF Vertical offset of a welded connection

HS Horizontal offset of a rail head

K Parallelism tolerance of a rail with reference to the web

ΔD Diameter tolerance for coupled and independently driven crane/cab wheels

Δe Tolerance of the wheel base in ground plan

ΔF Alignment tolerance of guide rollers in ground plan

Δhr Height tolerance of the points of wheel contact

ΔN Tolerance of parallel offset of the wheels in ground plan

αF Axle tolerance of parallelism of guide rollers across the track

βF Axle tolerance of parallelism of guide rollers across the track

ϕk Axle tolerance of parallelism in a ground plan of the hole (inclination of axis)

ϕr Axle tolerance of parallelism in a ground plan of the wheel (inclination of wheel)

τk Axle tolerance parallelism in elevation of the hole (axle camber)

τr Axle tolerance of parallelism in elevation of the wheel (wheel camber)

bs Tolerance of straightness related to a test length of 1 m adjacent to a welded rail joint

ch Tolerance of straightness related to a test length of 2 m adjacent to a welded rail joint

2 © ISO 2012 – All rights reservedCopyright International Organization for Standardization Provided by IHS under license with ISO


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ISO 12488-1:2012(E)

These symbols and their meanings are applicable to all parts of ISO 12488.

Where symbols for construction tolerances are also applicable to operational tolerances (e.g. in operator instructions), the suffix w is used (e.g. Aw, Bw, Cw, Ew).

Where necessary, an additional suffix may be added, for example,

Aw1 operational tolerance for travelling tracks,

Aw2 operational tolerances for traversing tracks,

Aw3 operational tolerances for cranes,

Aw4 operational tolerances for crabs.

5 Classificationoftolerances

The main criterion for determining the class of tolerance is the total amount of travel throughout the life of the crane; however, system sensitivity shall be considered along with the class of tolerance as given in other parts of ISO 12488.

NOTE In the context of this part of ISO 12488, system sensitivity is considered to be the amount of reaction of the system in terms of load effect resulting from the tolerance considered as unintentional displacement (see ISO 8686-1:1989, 6.1.5). In the case of highly sensitive systems, it could be appropriate to select a higher tolerance class than that shown in Table 1.

Table 1 — Tolerance classes

Tolerance classLimits of travelling and traversing distance

km

1 50 000 ≤ L

2 10 000 ≤ L < 50 000

3 L < 10 000, for stationary erected tracks

4 Temporarily erected tracks for building and erection purposesNOTE L is calculated as the product of the normal travel speed and the specified working time of the relevant travel/traverse mechanism, either by application of customer specified values or through reference to the classification of the mechanism (see ISO 4301-1).

6 Tolerances

6.1 General

The tolerances for the various classes and parameters shall be as given in Tables 2, 3, 4, 5, 6 and 7.

6.2 Thermal effects

The tolerances given in Tables 2, 3, 4, 5, 6 and 7 shall be used for an ambient temperature of 20°C. Where the average ambient temperature for the operational position of the crane differs from 20°C, the tolerances shall be adjusted accordingly.

6.3 Application of vertical out-of-plane tolerance

The tolerance Δhr given in Tables 4 and 5 for the vertical out-of-plane displacement of a corner of rail wheel of a crane or crane crab, and the corresponding tolerances for tracks given in Tables 2 and 3 are valid for rigid structures travelling or traversing on the rails, i.e. for box beam structures of main girders, crabs or portals. For frames built from open sections, the tolerances used may be one or two classes lower.



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ISO 12488-1:2012(E)

6.4 Construction tolerances

6.4.1 General

The measurements shall be taken in the unloaded condition with the crane and its associated tracks supported in the manner in which they will be operated. Tables 2 to 6 show the appropriate tolerances.

If technical documentation requires a means for differentiation of the tolerances, a suffix shall be added to the tolerance symbol, corresponding to the relevant table in this part of ISO 12488.

EXAMPLE A2 is the construction tolerances for travelling tracks as per Table 2.

6.4.2 Rail joints

Construction tolerances shall be in accordance with Table 6.

6.5 Operational tolerances

The operational tolerances given in Table 7 shall be measured with the crane in the unloaded condition.

NOTE Tolerances in excess of those shown in Table 7 can result in unacceptable ride characteristics and additional stresses, leading to increased wear on rails, wheels, guide rollers etc., and possible damage to the supporting structure. If any measurements are beyond the tolerances in Table 7, then investigations should be undertaken by a competent engineer and the appropriate action taken.



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ISO 12488-1:2012(E)

Tabl

e 2

— C

onst

ruct

ion

tole

ranc

es fo

r tra

velli

ng tr

acks

of t

oler

ance

cla

sses

1 to

4

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t of t

his

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

ATo

lera

nce

of s

pan

S of

th

e cr

ane

rails

rela

ted

to

rail

cent

re a

t eac

h po

int

of tr

avel

ling

track

±3

Valid

for a

ll sp

ans

S ≤

16 m

±[3

+ 0,

25(S

−16)

]

±10

max

.

Valid

for s

pans

S

> 16

m, S

in

met

res

±5

Valid

for a

ll sp

ans

S ≤

16 m

±[5

+ 0,

25(S

−16)

]

±15

max

.

Valid

for s

pans

S

> 1

6 m

, S in

m

etre

s

±8

Valid

for a

ll sp

ans

S ≤

16 m

±[8

+ 0,

25(S

−16)

]

±20

max

.

Valid

for s

pans

S

> 16

m, S

in

met

res

±12,

5

Valid

for a

ll sp

ans

S ≤

16 m

±[12

,5+

0,25

(S−1

6)]

±25

max

.

Valid

for s

pans

S

> 16

m, S

in

met

res

mm

BTo

lera

nce

of h

oriz

onta

l st

raig

htne

ss o

f rai

l hea

d at

eac

h po

int o

f tra

velli

ng

track

Pos

ition

of c

rane

rail

in g

roun

d pl

an±5

±10

±20

±40

mm

bTo

lera

nce

of h

oriz

onta

l st

raig

htne

ss re

late

d to

te

st le

ngth

of 2

000

mm

(s

ampl

e va

lue)

at e

ach

poin

t of r

ail h

ead

11

24

mm

CTo

lera

nce

of

stra

ight

ness

rela

ted

to h

eigh

t of c

rane

rail

cent

re a

t eac

h po

int o

f tra

velli

ng tr

ack

Hei

ght o

f cra

ne ra

il (a

xial

slo

pe)

±5±1

0±2

0±4

0m

m

cTo

lera

nce

of

stra

ight

ness

rela

ted

to

test

leng

th o

f 2 0

00 m

m

(sam

ple

valu

e) a

t eac

h po

int o

f hei

ght o

f cra

ne

rail

12

48

mm

ETo

lera

nce

of h

eigh

t re

late

d to

opp

osite

m

easu

ring

poin

ts a

t rig

ht

angl

es a

t eac

h po

int o

f tra

velli

ng tr

ack

Hei

ght o

f tra

velli

ng tr

ack

(late

ral s

lope

)

±0,5

S

S in

met

res

E ≤

E max

±5 m

ax.

±S

S in

met

res

E ≤

E max

±10

max

.

±2 S

S in

met

res

E ≤

E max

±20

max

.

±4 S

S in

met

res

E ≤

E max

±40

max

.

mm



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ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t of t

his

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

FTo

lera

nce

of p

aral

lelis

m

of e

nd s

tops

or b

uffe

rs

on tr

avel

ling

track

at

righ

t ang

les

to

long

itudi

nal a

xis

with

pa

ralle

lism

sym

bol /

/

Pos

ition

in a

gro

und

plan

(dat

um s

ymbo

l in

acco

rdan

ce w

ith

ISO

110

1)

±0,8

S

±8 m

ax.

S in

met

res

±S

±10

max

.

S in

met

res

±1,2

5 S

±12,

5 m

ax.

S in

met

res

±1,6

S

±16

max

.

S in

met

res

mm

GTo

lera

nce

of a

ngul

arity

re

late

d to

cra

ne ra

il cr

oss-

sect

ion

at e

ach

poin

t of t

rave

lling

trac

k w

ith a

ngul

arity

sym

bol ∠

46

912

0/00

(see

Ta

ble

3)

Δhr

Hei

ght t

oler

ance

of

poin

ts o

f whe

el c

onta

ct

of e

ach

poin

t of t

rave

lling

tra

ck

0,5S

or 0

,5e

5 m

ax.

e an

d S

in m

etre

s,

inse

rt e

or S

, w

hich

ever

is th

e le

ast

1,0S

or 1

,0e

10 m

ax.

e an

d S

in m

etre

s,

inse

rt e

or S

, w

hich

ever

is th

e le

ast

1,6S

or 1

,6e

16 m

ax.

e an

d S

in

met

res,

inse

rt e

or S

, whi

chev

er

is th

e le

ast

2,0S

or 2

,0e

20 m

ax.

e an

d S

in m

etre

s,

inse

rt e

or S

, w

hich

ever

is th

e le

ast

mm

KTo

lera

nce

of p

aral

lelis

m

of c

rane

rail

to w

eb a

t ea

ch p

oint

of t

rave

lling

tra

ck

t min

= s

mal

lest

thic

knes

s of

web

±0,5

t min

—m

m

Tabl

e 2

(con

tinue

d)



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ISO 12488-1:2012(E)

Tabl

e 3

— C

onst

ruct

ion

tole

ranc

es fo

r tra

vers

ing

trac

ks o

f tol

eran

ce c

lass

es 1

to 4

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

ATo

lera

nce

of s

pan

S of

cr

ab ra

ils re

late

d to

rail

cent

re a

t eac

h po

int o

f tra

vers

ing

track

±3

Valid

for a

ll sp

ans

S ≤

16 m

±5

Valid

for a

ll sp

ans

S ≤

16 m

±8

Valid

for a

ll sp

ans

S ≤

16 m

±12,

5

Valid

for a

ll sp

ans

S ≤

16 m

mm

bTo

lera

nce

of h

oriz

onta

l st

raig

htne

ss re

late

d to

te

st le

ngth

of 2

000

mm

(s

ampl

e va

lue)

at e

ach

poin

t of r

ail h

ead

Pos

ition

of c

rab

rail

in g

roun

d pl

an (d

atum

sym

bol i

n ac

cord

ance

with

ISO

110

1)

11

24

mm

ETo

lera

nce

of h

eigh

t re

late

d to

opp

osite

m

easu

ring

poin

ts a

t rig

ht

angl

es a

t eac

h po

int o

f tra

vers

ing

track

Hei

ght o

f tra

vers

ing

track

(lat

eral

slo

pe)

±3,2

Valid

for a

ll sp

ans

S ≤

2 m

±1,6

S

E ≤

E max

S in

met

res,

val

id

for S

> 2

m

±6,3

max

.

±4,2

Valid

for a

ll sp

ans

S ≤

2 m

±2S

E ≤

Em

ax

S in

met

res,

val

id

for S

> 2

m

±8 m

ax.

±5

Valid

for a

ll sp

ans

S ≤

2 m

±2,5

S

E ≤

Em

ax

S in

met

res,

val

id

for S

> 2

m

±10

max

.

±6,3

Valid

for a

ll sp

ans

S ≤

2 m

±3,2

S

E ≤

Em

ax

S in

met

res,

val

id

for S

> 2

m

±12,

5 m

ax.

mm

Δhr

Hei

ght t

oler

ance

of

poi

nts

of w

heel

co

ntac

t at e

ach

poin

t of

trave

rsin

g tra

ck

1,6

Valid

for a

ll sp

ans

S ≤

2 m

0,8S

Δhr

≤ Δh

r max

S in

met

res,

val

id

for S

> 2

m

3,2

max

.

2

Valid

for a

ll sp

ans

S ≤

2 m

1S

Δhr

≤ Δh

r max

S in

met

res,

val

id

for S

> 2

m

4 m

ax.

2,5

Valid

for a

ll sp

ans

S ≤

2 m

1,25

S

Δhr

≤ Δh

r max

S in

met

res,

val

id

for S

> 2

m

5 m

ax.

3,2

Valid

for a

ll sp

ans

S ≤

2 m

1,6S

Δhr

≤ Δh

r max

S in

met

res,

val

id

for S

> 2

m

6,3

max

.

mm



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ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

FTo

lera

nce

of p

aral

lelis

m

of e

nd s

tops

or b

uffe

rs

on tr

aver

sing

trac

k to

righ

t ang

les

to

long

itudi

nal a

xis

with

pa

ralle

lism

sym

bol /

/

Pos

ition

in a

gro

und

plan

0,8S

±8 m

ax.

S in

met

res

S

±10

max

.

S in

met

res

1,25

S

±12,

5 m

ax.

S in

met

res

1,6S

±16

max

.

S in

met

res

mm

GTo

lera

nce

of a

ngul

arity

re

late

d to

cra

b ra

il cr

oss-

sect

ion

at e

ach

poin

t of

trav

ersi

ng tr

ack

with

an

gula

rity

sym

bol ∠

46

912

0/00

(see

N

ote)

KTo

lera

nce

of p

aral

lelis

m

of c

rab

rail

rela

ted

to

web

at e

ach

poin

t of

trave

rsin

g tra

ck w

ith

para

llelis

m s

ymbo

l //

t min

= s

mal

lest

thic

knes

s of

web

±0,5

t min

—m

m

NO

TE

Par

amet

er G

with

the

char

acte

ristic

of d

atum

app

lies

to c

rab

rails

with

flat

upp

er ra

il su

rfac

es o

nly.

For

cra

b ra

ils w

ith c

onve

x su

rfac

es, t

oler

ance

s fo

r G a

re n

ot re

quire

d.

Tabl

e 3

(con

tinue

d)



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ISO 12488-1:2012(E)

Tabl

e 4

— C

onst

ruct

ion

tole

ranc

es fo

r cra

ne w

heel

s of

tole

ranc

e cl

asse

s 1

to 4

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

resp

ect t

o th

is ta

ble

Gra

phic

al re

pres

enta

tion

Cla

ss 1

Cla

ss 2

Cla

ss 3

Cla

ss 4

Uni

t

ATo

lera

nce

of s

pan

S of

a c

rane

re

late

d to

whe

el c

entre

, whe

el

with

flan

ges

±2

Valid

for a

ll sp

ans

S ≤

10 m

±[2

+ 0,

1(S−

10)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

±2,5

Valid

for a

ll sp

ans

S ≤

10 m

±[2,

5 +

0,1(

S−10

)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

±3,2

Valid

for a

ll sp

ans

S ≤

10 m

±[3,

2 +

0,1(

S−10

)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

±4

Valid

for a

ll sp

ans

S ≤

10 m

±[4

+ 0,

1(S−

10)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10

m

mm

ATo

lera

nce

of s

pan

S of

a

cran

e re

late

d to

whe

el c

entre

, fla

ngel

ess

whe

els,

gui

de

rolle

rs o

n on

e si

de

±3,2

Valid

for a

ll sp

ans

S ≤

10 m

±[3,

2 +

0,1(

S−10

)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

±4

Valid

for a

ll sp

ans

S ≤

10 m

±[4

+ 0,

1(S−

10)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

±5

Valid

for a

ll sp

ans

S ≤

10 m

±[5

+ 0,

1(S−

10)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

±6,3

Valid

for a

ll sp

ans

S ≤

10 m

±[6,

3 +

0,1(

S−10

)]

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

mm

ΔeTo

lera

nce

of w

heel

bas

e e

or

boge

y di

stan

ce e

, 8 w

heel

s±3

,2

Valid

for e

≤ 3

m

±e

e in

met

res,

val

id

for e

> 3

m

±4

Valid

for e

≤ 3

m

±1,2

5e

e in

met

res,

val

id

for e

> 3

m

±5

Valid

for e

≤ 3

m

±1,6

e

e in

met

res,

val

id

for e

> 3

m

±6,3

Valid

for e

≤ 3

m

±2e

e in

met

res,

val

id

for e

> 3

m

mm

ΔN

Par

alle

l offs

et o

f cra

ne w

heel

s or

bog

eys,

8 w

heel

s±5

Valid

for

inde

pend

ent d

rive

only

±2

Valid

for c

oupl

ed

driv

e on

ly,

S ≤

20 m

±[2

+ 0,

2(S−

20)]

S in

met

res,

val

id

for c

oupl

ed d

rive

only

, S >

20

m

±6,3

Valid

for

inde

pend

ent d

rive

only

±2,5

Valid

for c

oupl

ed

driv

e on

ly,

S ≤

20 m

±[2,

5 +

0,2(

S−20

)]

S in

met

res,

val

id

for c

oupl

ed d

rive

only

, S >

20

m

±8

Valid

for

inde

pend

ent d

rive

only

±3,2

Valid

for c

oupl

ed

driv

e on

ly,

S ≤

20 m

±[3,

2 +

0,2(

S−20

)]

S in

met

res,

val

id

for c

oupl

ed d

rive

only

, S >

20

m

±10

Valid

for

inde

pend

ent d

rive

only

±4

Valid

for c

oupl

ed

driv

e on

ly,

S ≤

20 m

±[4

+ 0,

2(S−

20)]

S in

met

res,

val

id

for c

oupl

ed d

rive

only

, S >

20

m

mm



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

resp

ect t

o th

is ta

ble

Gra

phic

al re

pres

enta

tion

Cla

ss 1

Cla

ss 2

Cla

ss 3

Cla

ss 4

Uni

t

ΔF

Alig

nmen

t tol

eran

ce o

f gui

de

rolle

rs o

r whe

el fl

ange

s±0

,32a

a in

met

res

±0,4

e

e in

met

res

±0,4

a

a in

met

res

±0,5

e

e in

met

res

±0,5

a

a in

met

res

±0,6

3e

e in

met

res

±0,6

3a

a in

met

res

±0,8

e

e in

met

res

mm

Δhr

Hei

ght t

oler

ance

of p

oint

s of

w

heel

con

tact

For a

giv

en s

tiffn

ess

of

stru

ctur

es re

late

d to

whe

el

load

s, th

e di

ffere

nce

in h

eigh

t be

twee

n th

e po

ints

of w

heel

co

ntac

t sha

ll be

lim

ited

in s

uch

a w

ay th

at th

e m

ean

whe

el

load

(cra

b w

ith lo

ad in

cen

tre

of b

ridge

) of t

he d

riven

whe

els

can

chan

ge b

y no

mor

e th

an

± 5

%. W

here

this

cal

cula

tion

is n

ot m

ade,

Δhr

is v

alid

for

the

heig

ht to

lera

nce

acco

rdin

g to

this

tabl

e. T

he h

eigh

t to

lera

nce

of th

e po

ints

of

whe

el c

onta

ct o

f a c

rane

is th

e m

axim

um v

ertic

al d

ista

nce

of

a po

int o

f whe

el c

onta

ct fr

om

plan

e S;

e s

et b

y th

ree

poin

ts

of w

heel

con

tact

. For

sta

tical

ly

dete

rmin

ate

supp

orte

d cr

anes

, Δh

r =

0,4

S m

ay b

e us

ed.

2 m

ax.

Valid

for a

ll sp

ans

S ≤

10 m

[2 +

0,1

(S−1

0)]

max

.

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

2,5

max

.

Valid

for a

ll sp

ans

S ≤

10 m

[2,5

+ 0

,1(S

−10)

] m

ax.

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

3,2

max

.

Valid

for a

ll sp

ans

S ≤

10 m

[3,2

+ 0

,1(S

−10)

] m

ax.

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

4 m

ax.

Valid

for a

ll sp

ans

S ≤

10 m

[4 +

0,1

(S−1

0)]

max

.

S in

met

res,

val

id

for a

ll sp

ans

S >

10 m

mm

Tabl

e 4

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

resp

ect t

o th

is ta

ble

Gra

phic

al re

pres

enta

tion

Cla

ss 1

Cla

ss 2

Cla

ss 3

Cla

ss 4

Uni

t

ΔD

Dia

met

er to

lera

nce

for

coup

led

and

inde

pend

ently

dr

iven

cra

ne w

heel

s.

a/S

with

out w

heel

flan

ges

e/S

with

whe

el fl

ange

s

∆DD

DD

DD

DD

=−

=+

>1

21

21

22

;;

Whe

re w

heel

s ar

e m

echa

nica

lly o

r ele

ctric

ally

cou

pled

, it

is n

eces

sary

to c

heck

whe

ther

the

max

imum

allo

wab

le

diam

eter

diff

eren

ce re

quire

s hi

gher

val

ues

for e

and

a, o

r lo

wer

tole

ranc

es. F

or c

rane

s w

ith tw

o co

uple

d dr

ives

, ΔD

sh

all b

e di

vide

d by

1,4

.

h9

For D

1 an

d D

2. D

iam

eter

to

lera

nce

acco

rdin

g to

IS

O 2

86-2

16,aD

SD

in m

etre

s

16,eD S

D in

met

res

h9

For D

1 an

d D

2. D

iam

eter

to

lera

nce

acco

rdin

g to

IS

O 2

86-2

2aD S

D in

met

res

2eD S

D in

met

res

h9

For D

1 an

d D

2. D

iam

eter

to

lera

nce

acco

rdin

g to

IS

O 2

86-2

25,aD

SD

in m

etre

s

25,eD S

D in

met

res

h9

For D

1 an

d D

2. D

iam

eter

to

lera

nce

acco

rdin

g to

IS

O 2

86-2

32,aD

SD

in m

etre

s

32,eD S

D in

met

res

mm

ϕkA

xle

para

llelis

m to

lera

nce

in

a gr

ound

pla

n (in

clin

atio

n of

ax

is)

±0,3

±0,4

±0,5

±0,6

30/

00

ϕrA

xle

para

llelis

m to

lera

nce

in

a gr

ound

pla

n (in

clin

atio

n of

w

heel

)±0

,4±0

,5±0

,63

±0,8

0/00

τkA

xle

para

llelis

m to

lera

nce

in

elev

atio

n (a

xle

cam

ber)

The

tole

ranc

es a

re fo

r an

unlo

aded

cra

ne (w

ithou

t cra

b)

with

unr

estri

cted

sup

port

on

or n

ear t

he e

nd c

arria

ges.

The

m

ean

valu

es o

f tol

eran

ces

are

chos

en a

ppro

xim

atel

y so

that

und

er lo

ad (c

rab

with

to

tal l

oad

in c

entre

of b

ridge

), a

horiz

onta

l pos

ition

of t

he

whe

el a

xle

will

resu

lt fro

m

elas

tic d

efor

mat

ion.

+ 1,

9

− 0,

4

+ 2,

4

− 0,

50/

00

Tabl

e 4

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

resp

ect t

o th

is ta

ble

Gra

phic

al re

pres

enta

tion

Cla

ss 1

Cla

ss 2

Cla

ss 3

Cla

ss 4

Uni

t

τrA

xle

para

llelis

m to

lera

nce

in

elev

atio

n (w

heel

cam

ber)

The

tole

ranc

es a

re fo

r an

unlo

aded

cra

ne (w

ithou

t cra

b)

with

unr

estri

cted

sup

port

on

or n

ear t

he e

nd c

arria

ges.

The

m

ean

valu

es o

f tol

eran

ces

are

chos

en a

ppro

xim

atel

y so

that

und

er lo

ad (c

rab

with

to

tal l

oad

in c

entre

of b

ridge

), a

horiz

onta

l pos

ition

of t

he

whe

el a

xle

will

resu

lt fro

m

elas

tic d

efor

mat

ion.

+ 2

− 0,

5

+ 2,

6

− 0,

60/

00

FTo

lera

nce

of p

aral

lelis

m o

f en

d st

ops

or b

uffe

rs o

n cr

ane

at ri

ght a

ngle

s to

long

itudi

nal

axis

with

par

alle

lism

sym

bol /

/

±(0,

8S)

S in

met

res

±8 m

ax.

±(1,

0S)

S in

met

res

±10

max

.

±(1,

25S)

S in

met

res

±12,

5 m

ax.

±(1,

6S)

S in

met

res

±16

max

.

mm

αFA

xle

para

llelis

m to

lera

nce

of

guid

e ro

llers

acr

oss

trave

lling

tra

ck±0

,5±0

,63

±0,8

±10/

00

βFA

xle

para

llelis

m to

lera

nce

of

guid

e ro

llers

alo

ng tr

avel

ling

track

±0,3

±0,4

±0,5

±0,6

30/

00

ΔhF

Hei

ght t

oler

ance

of h

F

+ −0 1

+ −0 16,

+ −0 25,

+ −0 4

mm

Tabl

e 4

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tabl

e 5

— C

onst

ruct

ion

tole

ranc

es fo

r cra

b w

heel

s of

tole

ranc

e cl

asse

s 1

to 4

and

tole

ranc

e fo

r the

gui

de ro

llers

in T

able

4

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

ATo

lera

nce

of s

pan

S of

a

crab

rela

ted

to w

heel

ce

ntre

, whe

el w

ith

flang

es

±1

Valid

for a

ll sp

ans

S ≤

2 m

±[1

+ 0,

1(S−

2)]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

±2

Valid

for a

ll sp

ans

S ≤

2 m

±[2

+ 0,

1(S−

2)]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

±2,5

Valid

for a

ll sp

ans

S ≤

2 m

±[2,

5 +

0,1(

S−2)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

±3,2

Valid

for a

ll sp

ans

S ≤

2 m

±[3,

2 +

0,1(

S−2)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

mm

ATo

lera

nce

of s

pan

S of

a

crab

rela

ted

to w

heel

ce

ntre

, flan

gele

ss w

heel

, w

ith g

uide

rolle

rs o

n on

e si

de

±1,6

Valid

for a

ll sp

ans

S ≤

2 m

±[1,

6 +

0,1(

S−2)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

±3,2

Valid

for a

ll sp

ans

S ≤

2 m

±[3,

2 +

0,1(

S−2)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

±4

Valid

for a

ll sp

ans

S ≤

2 m

±[4

+ 0,

1(S−

2)]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

±5

Valid

for a

ll sp

ans

S ≤

2 m

±[5

+ 0,

1(S−

2)]

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

mm

ΔeTo

lera

nce

of w

heel

ba

se e

of c

rab

whe

els

or b

ogey

dis

tanc

e e,

8

whe

els

±3,2

e in

met

res,

val

id

for e

≤ 3

m

±e

e in

met

res,

val

id

for e

> 3

m

±4

e in

met

res,

val

id

for e

≤ 3

m

±1,2

5e

e in

met

res,

val

id

for e

> 3

m

±5

e in

met

res,

val

id

for e

≤ 3

m

±1,6

e

e in

met

res,

val

id

for e

> 3

m

±6,3

e in

met

res,

val

id

for e

≤ 3

m

±2e

e in

met

res,

val

id

for e

> 3

m

mm

ΔN

Par

alle

l offs

et o

f cra

b w

heel

s or

bog

eys,

8

whe

els

±5

Valid

for

inde

pend

ent d

rive

only

±2

Valid

for c

oupl

ed

driv

e on

ly

±6,3

Valid

for

inde

pend

ent d

rive

only

±2,5

Valid

for c

oupl

ed

driv

e on

ly

±8

Valid

for

inde

pend

ent d

rive

only

±3,2

Valid

for c

oupl

ed

driv

e on

ly

±10

Valid

for

inde

pend

ent d

rive

only

±4

Valid

for c

oupl

ed

driv

e on

ly

mm

ΔF

Alig

nmen

t tol

eran

ce o

f gu

ide

rolle

rs o

r whe

el

flang

es

±0,3

2a

a in

met

res

±0,4

e

e in

met

res

±0,4

a

a in

met

res

±0,5

e

e in

met

res

±0,5

a

a in

met

res

±0,6

3e

e in

met

res

±0,6

3a

a in

met

res

±0,8

e

e in

met

res

mm



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

ΔD

Dia

met

er to

lera

nce

for c

oupl

ed a

nd

inde

pend

ently

driv

en

crab

whe

els

h9

Dia

met

er

tole

ranc

e ac

cord

ing

to

ISO

286

-2

h9

Dia

met

er

tole

ranc

e ac

cord

ing

to

ISO

286

-2

h9

Dia

met

er

tole

ranc

e ac

cord

ing

to

ISO

286

-2

h9

Dia

met

er

tole

ranc

e ac

cord

ing

to

ISO

286

-2

mm

Δhr

Hei

ght o

f tol

eran

ce o

f po

ints

of w

heel

con

tact

1,6

max

.

Valid

for a

ll sp

ans

S ≤

2 m

[1,6

+ 0

,1(S

−2)]

max

.

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

2 m

ax.

Valid

for a

ll sp

ans

S ≤

2 m

[2 +

0,1

(S−2

)]

max

.

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

2,5

max

.

Valid

for a

ll sp

ans

S ≤

2 m

[2,5

+ 0

,1(S

−2)]

max

.

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

3,2

max

.

Valid

for a

ll sp

ans

S ≤

2 m

[3,2

+ 0

,1(S

−2)]

max

.

S in

met

res,

val

id

for a

ll sp

ans

S >

2 m

mm

ϕkA

xle

para

llelis

m

tole

ranc

e in

a g

roun

d pl

an o

f cra

b fra

me

(incl

inat

ion

of a

xis)

±0,3

±0,4

±0,5

±0,6

30/

00

ϕrA

xle

para

llelis

m

tole

ranc

e in

a g

roun

d pl

an o

f cra

b w

heel

(in

clin

atio

n of

whe

el)

±0,4

±0,5

±0,6

3±0

,80/

00

τkA

xle

para

llelis

m

tole

ranc

e in

ele

vatio

n of

cra

b fra

me

(axl

e ca

mbe

r)+ −19 04, ,

+ −24

05, ,

——

0/00

τrA

xle

para

llelis

m

tole

ranc

e in

ele

vatio

n of

cra

b w

heel

(whe

el

cam

ber)

+ −2 05,

+ −26

06, ,

0/00

Tabl

e 5

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

F

Tole

ranc

e of

par

alle

lism

of

end

sto

ps o

f buf

fers

on

cra

b at

righ

t ang

les

to lo

ngitu

dina

l axi

s w

ith

para

llelis

m s

ymbo

l //

±0,8

S

S in

met

res

±8 m

ax.

±S

S in

met

res

±10

max

.

±1,2

5S

S in

met

res

±12,

6 m

ax.

±1,6

S

S in

met

res

±16

max

.

mm

NO

TE

For t

oler

ance

s of

gui

de ro

llers

, see

Tab

le 4

.

Tabl

e 5

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)Ta

ble

6 —

Con

stru

ctio

n to

lera

nces

for r

ail j

oint

s

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

Gra

phic

al re

pres

enta

tion

All

clas

ses

Uni

t

HF

Vert

ical

offs

et o

f the

w

elde

d jo

int a

t the

rail

flang

e

HF

to b

e re

mov

ed b

y fin

ish

grin

ding

0 (fo

r wel

ding

in p

rodu

ctio

n)

1 m

ax. (

for w

eldi

ng o

n si

te)

mm

HS

Hor

izon

tal o

ffset

of t

he

rail

head

Pos

ition

in g

roun

d pl

an

1 m

ax.,

with

a ta

per o

f 1:5

0 to

ble

nd th

e of

fset

mm

b sIn

clin

atio

n of

rail

in

grou

nd p

lan

b s a

nd

heig

ht c

h (la

tera

l slo

pe)

with

ang

ular

ity s

ymbo

l ∠

Tole

ranc

es b

s an

d c h

re

late

d to

a te

st le

ngth

of

1 m

Une

venn

ess

near

join

t wel

ding

sha

ll be

true

d up

at t

he ra

il he

ad

by g

rindi

ng w

ithou

t not

ches

2m

m

c h

2m

m

HX

Flat

ness

afte

r grin

ding

th

e tru

ed-u

p ar

ea o

f HS

No

finis

hing

requ

ired

at

the

rail

end

join

t nea

r th

e ra

il fa

sten

ing

for a

st

agge

red

rail

end

join

t

—0,

5 m

ax.

mm

Det

acha

ble

rail

join

ts s

hall

be in

acc

orda

nce

with

this

tabl

e.



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tabl

e 7

— O

pera

tiona

l tol

eran

ces

for t

rave

l and

trav

erse

trac

ks a

nd c

rane

and

cra

b w

heel

s of

tole

ranc

es c

lass

es 1

to 4

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

A w1

Tole

ranc

e of

spa

n S

of c

rane

rails

rela

ted

to ra

il ce

ntre

at e

ach

poin

t of t

rave

lling

trac

k

±10

Valid

for a

ll sp

ans

S ≤

16 m

±[10

+ 0,

25(S

−16)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

16 m

±16

Valid

for a

ll sp

ans

S ≤

16 m

±[16

+ 0,

25(S

−16)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

16 m

±25

Valid

for a

ll sp

ans

S ≤

16 m

±[25

+ 0,

25(S

−16)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

16 m

±40

Valid

for a

ll sp

ans

S ≤

16 m

±[40

+ 0,

25(S

−16)

]

S in

met

res,

val

id

for a

ll sp

ans

S >

16 m

mm

B w1

Tole

ranc

e of

hor

izon

tal

stra

ight

ness

of r

ail

head

at e

ach

poin

t of

trave

lling

trac

k

Pos

ition

of c

rane

rail

in g

roun

d pl

an

±10

±20

±40

±80

mm

E w1

Tole

ranc

e of

hei

ght

rela

ted

to o

ppos

ite

mea

surin

g po

ints

at

right

ang

les

at e

ach

poin

t of t

rave

lling

trac

k

Hei

ght o

f tra

vers

ing

track

(lat

eral

slo

pe)

±10

±20

±40

±80

mm

A w2

Tole

ranc

e of

spa

n S

of

crab

rails

rela

ted

to ra

il ce

ntre

at e

ach

poin

t of

trave

rsin

g tra

ck

±6

Valid

for a

ll sp

ans

S ≤

16 m

±10

Valid

for a

ll sp

ans

S ≤

16 m

±16

Valid

for a

ll sp

ans

S ≤

16 m

±25

Valid

for a

ll sp

ans

S ≤

16 m

mm



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

E w2

Tole

ranc

e of

hei

ght

rela

ted

to o

ppos

ite

mea

surin

g po

ints

at

right

ang

les

at e

ach

poin

t of t

rave

rsin

g tra

ck

Hei

ght o

f tra

vers

ing

track

(lat

eral

slo

pe)

±12,

5±1

6±2

0±2

5m

m

A w3

Tole

ranc

e of

spa

n S

of a

cra

ne re

late

d to

w

heel

cen

tre, w

heel

w

ith fl

ange

s

±5

Valid

for S

≤ 1

0 m

±[5+

0,2(

S−10

)]

S in

met

res,

val

id

for S

> 1

0 m

±8

Valid

for S

≤ 1

0 m

±[8+

0,2(

S−10

)]

S in

met

res,

val

id

for S

> 1

0 m

±12,

5

Valid

for S

≤ 1

0 m

±[12

,5+0

,2(S

−10)

]

S in

met

res,

val

id

for S

> 1

0 m

±20

Valid

for S

≤ 1

0 m

±[20

+0,2

(S−1

0)]

S in

met

res,

val

id

for S

> 1

0 m

mm

A w3

Tole

ranc

e of

spa

n S

of a

cra

ne re

late

d to

w

heel

cen

tre, w

ith

flang

eles

s w

heel

s an

d gu

ide

rolle

rs o

n on

e si

de

±12,

5

Valid

for S

≤ 1

0 m

±[12

,5+0

,2(S

−10)

]

S in

met

res,

val

id

for S

> 1

0 m

±14

Valid

for S

≤ 1

0 m

±[14

+0,2

(S−1

0)]

S in

met

res,

val

id

for S

> 1

0 m

±16

Valid

for S

≤ 1

0 m

±[16

+0,2

(S−1

0)]

S in

met

res,

val

id

for S

> 1

0 m

±20

Valid

for S

≤ 1

0 m

±[20

+0,2

(S−1

0)]

S in

met

res,

val

id

for S

> 1

0 m

mm

ΔDw

3To

lera

nce

on c

rane

w

heel

dia

met

er fo

r in

depe

nden

t driv

e

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

mm

ΔDw

3To

lera

nce

on c

rane

w

heel

dia

met

er fo

r co

uple

d dr

ive

IT12

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

IT13

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

IT14

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

IT14

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

mm

Tabl

e 7

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Tole

ranc

e pa

ram

eter

Tole

ranc

e

Sym

bol

Des

crip

tion

with

re

spec

t to

this

tabl

eG

raph

ical

repr

esen

tatio

nC

lass

1C

lass

2C

lass

3C

lass

4U

nit

A w4

Tole

ranc

e of

spa

n S

of

a cr

ab re

late

d to

whe

el

cent

re, w

heel

with

fla

nges

±3

Valid

for a

ll sp

ans

S ≤

2 m

±[3

+ 0,

2(S−

2)]

S in

met

res,

val

id

for S

> 2

m

±6

Valid

for a

ll sp

ans

S ≤

2 m

±[6

+ 0,

2(S−

2)]

S in

met

res,

val

id

for S

> 2

m

±8

Valid

for a

ll sp

ans

S ≤

2 m

±[8

+ 0,

2(S−

2)]

S in

met

res,

val

id

for S

> 2

m

±12

Valid

for a

ll sp

ans

S ≤

2 m

±[12

+ 0

,2(S

−2)]

S in

met

res,

val

id

for S

> 2

m

mm

Tole

ranc

e of

spa

n S

of

a cr

ab re

late

d to

whe

el

cent

re, w

ith fl

ange

less

w

heel

s an

d gu

ide

rolle

rs o

n on

e si

de

±5

Valid

for a

ll sp

ans

S ≤

2 m

±[5+

0,2

(S−2

)]

S in

met

res,

val

id

for S

> 2

m

±10

Valid

for a

ll sp

ans

S ≤

2 m

±[10

+ 0,

2(S−

2)]

S in

met

res,

val

id

for S

> 2

m

±12

Valid

for a

ll sp

ans

S ≤

2 m

±[12

+ 0,

2(S−

2)]

S in

met

res,

val

id

for S

> 2

m

±16

Valid

for a

ll sp

ans

S ≤

2 m

±[16

+ 0,

2(S−

2)]

S in

met

res,

val

id

for S

> 2

m

mm

ΔD

w4

Tole

ranc

e of

cra

b w

heel

dia

met

er fo

r in

depe

nden

t driv

e

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

h18

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

mm

ΔD

w4

Tole

ranc

e of

cra

b w

heel

dia

met

er fo

r co

uple

d dr

ive

IT12

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

IT13

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

IT14

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

IT14

Tole

ranc

es

acco

rdin

g to

IS

O 2

86-2

mm

Tabl

e 7

(con

tinue

d)



--`,,```,,,,````-`-`,,`,,`,`,,`---

ISO 12488-1:2012(E)

Bibliography

[1] ISO 8686-1:1989, Cranes — Design principles for loads and load combinations — Part 1: General



--`,,```,,,,````-`-`,,`,,`,`,,`---



--`,,```,,,,````-`-`,,`,,`,`,,`---

Cranes — Tolerances for wheels and travel ... -...

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Transcript of Cranes — Tolerances for wheels and travel ... -...