TOPBALL - NB Corporation...rotational motion of ball elements. NB's self-aligning TOPBALL can be...

TOPBALL

TOPBALLⓇ

TOPBALLSTRUCTURE AND ADVANTAGES ・・・ D-2TYPES ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ D-3LIFE CALCULATION ・・・・・・・・・・・・・・・・・ D-4RELATION BETWEEN BALL CUIRCUITS AND LOAD RATING D-4MOUNTING ・・・・・・・・・・・・・・・・・・・・・・・・・・ D-5ANTI-CORROSIVE TYPE ・・・・・・・・・・・・・ D-6USE AND HANDLING PRECAUTIONS D-7DIMENSION TABLE ・・・・・・・・・・・・・・・・・・ D-8

D-1

TOPBALLRThe NB TOPBALL is a linear motion mechanism utilizing the rotational motion of ball elements. NB's self-aligning TOPBALL can be designed into many different applications such as factory automated equipment, machine tools, industrial machines, electrical equipment, optical and measuring instruments.

STRUCTURE AND ADVANTAGES

Higher Load Capacity and Longer Travel lifeNB's uniquely designed load plate provides circular arch contact to the ball element resulting in a greater dispersion of the load, enabling TOPBALL to provide up to three times the load capacity therefore 27 times the travel life of conventional slide bushings.

Self Aligning CapabilityLoad plates are thinner at the ends to provide a pivot point at the center of the plate. The center acts as a fulcrum to compensate for any slight misalignment between the shaft and the housing bore that might be caused by inaccurate machining, mounting errors or shaft deflection.Straight load plate ST option is available for non self-alignment.

Floating SealNB's unique floating seal design allows for self-alignment while maintaining equal and constant contact to the shaft. Seals do not add to the overall length of the bushing allowing for more compact designs.

High SpeedTOPBALL meets high speed requirements. The maximum speed is 5m/s.

Clearance AdjustableTOPBALL load plates are designed to "float" in the outer sleeve which allows for clearance between the ball elements and shaft to best suit application requirements.

TOPBALL UnitThis is a TOPBALL with a housing. The housing has the most appropriate bore tolerance that optimizes TOPBALL's performance.

Tolerance interchangeable with Asian Metric Slide Bush TypeShaft diameter tolerance for TMF and TMA types is the same as Asian Metric slide Bush (refer to "Clearance and Fit" in page D-6).TMF type is an easy to mount flange type.Mounting dimensions of TMA type are the same as those of Asian Metric SMA type which makes replacement easy.

Figure D-1 Circular Arch Design and Ground Surface Raceway

Figure D-2 Floating Seal and Self-aligning Feature

ground surface raceway

load plate

circular arch design

floating seal

1°

self-aligning feature

TYPES

Table D-1 Types

Metric Series Inch Series

TK

TK-OP

TKA

TKE

TKD

TKA-W

TKE-W

TKD-W

TW

TW-OP

TWA

TWJ

TWD

TWA-W

TWJ-W

TWD-W

P.D-12

P.D-14

P.D-16

P.D-8

P.D-8

P.D-15

P.D-17

P.D-20

P.D-24

P.D-10

P.D-10

P.D-21

P.D-25

TOP

BA

LLTO

PB

ALL

Uni

t

open

type

clos

ed ty

pecl

osed

type

adju

stab

le ty

peop

en ty

pe

P.D-13

Figure D-3 Basic Structure of TKload plate

resin retainer

ball element

floating seal

resin outer cylinder

side ring

TMF

P.D-18

TMA

P.D-19

adju

stab

le-o

pen

type

Toler

ance

inter

chan

geab

le wi

th As

ian M

etric

Slide

Bus

h Typ

e

P.D-22 P.D-23

D-2 D-3

TOPBALLTOPBALL

C CC

CMAXCMAX

none

CMAX

Cz

（except for TK10）（TW8 only）

Cz

C CC

CMAXCMAX CMAX

CzCz Cz

Applied Load Coefficient (fW)When calculating the applied load, the weight of the mass, inertial force, moment resulting from the motion, and the variation with time should be accurately estimated. However, it is very difficult to accurately estimate the applied load due to the existence of numerous variables, including the start/stop conditions of the reciprocating motion and of the shock/vibration. Estimation is simplified by using the values given in Table D-2.

LIFE CALCULATION

Since ball elements are used as the rolling element in the NB TOPBALL, the following equation is used to calculate the rated life.

If the stroke and number of cycles per unit time are constant, the life time is calculated using the following equation.

Lh: life time (hr) ℓs: stroke length (m)　L: rated life (km) n1: number of cycles per minute (cpm)

L: rated life (km) fH: hardness coefficientfT: temperature coefficient fC: contact coefficient fW: applied load coefficient (Table D-2)C: basic dynamic load rating (N) P: applied load (N)*Refer to page Eng-5 for the coefficients.

L＝（fH・fT・fCfW ・C

P ）3・50 Lh＝ L・103

2・ℓS・n1・60

Table D-2 Applied Load Coefficient

operating conditions

no shock/vibration0.25m/s or lesslow shock/vibration1m/s or lesshigh shock/vibration1.5m/s or lesshigh shock/vibration3m/s or less

5m/s or less

applied load coefficient fW

1.0〜1.5

1.5〜2.0

2.0〜3.5

3.5〜4.0

4.0 or more

The load rating varies according to the loaded position on the circumference.The value in the dimension table indicates the lowest load rating with the load placed on top of one ball circuit.Table D-3 shows the load ratio for the TK and TW TOPBALL.

MountingTK type TOPBALL is designed to be press fitted into the housing bore. When inserting bushing, however, don't apply excess force nor shock load which may cause permanent damage. For TW type TOPBALL, examples of mouting are shown in Figures D-4〜7 and D-9.

2. Housing: There are a wide range of designs and manufacturing techniques for housings. NB TOPBALL Units are available as standard products. When housings are prepared separately please refer to Table D-4 and D-5 for a proper fit.

Table D-4: Recommended Tolerance for Shaft Dia. and Housing Bore

partnumber

shaft dia. housing boredr

mmtol. (h6)

μmD

mmtol. (H7)

μmTK 8TK10TK12TK16TK20TK25TK30TK40TK50

81012162025304050

0−9

0−11

0−13

0−16

161922263240476275

＋18/0

＋210

＋250

＋300

Table D-5: Recommended Tolerance for Shaft Dia. and Housing Bore

partnumber

shaft dia. housing boredr

inchtol. (g6)

inchD

inchtol. (H7)

inchTW 3TW 4TW 6TW 8TW10TW12TW16TW20TW24TW32

.1875 .2500 .3750 .5000 .6250 .75001.00001.25001.50002.0000

−.0002 −.0006

−.0002 −.0007−.0003 −.0008−.0004 −.0010

−.0004/−.0012

.3750 .5000 .6250 .87501.12501.25001.56252.00002.37503.0000

＋.0005/0＋.0007

0＋.0008

0＋.0010

0

＋.00120

Clearance and FitAn appropriate clearance between TOPBALL and shaft is required in TOPBALL operation. Inadequate clearance may cause early failure and/or poor, rough movement. Proper clearance is determined by shaft diameter and housing bore. Table D-4〜6 show recommended tolerances of the shaft and housing bore.

Tolerance of TMF and TMA typeShaft diameter tolerance of TMF and TMA types matches that of Asian Metric Slide Bush:g6.Table D-6 shows recommended tolerances of TMF and TMA types. Please insert TMF type into an installation bore which is slightly larger than the outer cylinder.

Shaft and HousingTo optimize NB TOPBALL performance, high precision shafts and housings are required.1. Shaft: Dimensional tolerance, surface roughness and hardness greatly affect the traveling performance of

the TOPBALL.The shaft must be manufactured to the following tolerances.A. Surface roughness of Ra0.4 or less.B. Hardness of 58 HRC or more (refer to page Eng-5).C. The proper tolerance of the shaft diameter is recommended on Table D-4 and D-5.

The NB Shaft is an ideal component manufactured to meet these specifications. Please see pages F-1 〜 for details.

MOUNTING

Table D-3 Load Positionssize TK10〜TK16 TW10TK8 TW3〜TW8TK20〜TK50 TW12〜TW32

C(dynamic load rating in the table)

Cmax(maximum dynamic load rating)

load ratio Cmax/C CMAX/C

Cz/C

Cz(dynamic load rating in reverse direction)

load ratio Cz/C

1.414 1.4141.463 1.4631.280 1.280

ー 0.700.44 0.440.60 0.57

Table D-6: Recommended Tolerance（TMF,TMA type）

part numbershaft dia.

drmm

tol. (g6) μm

TMF16TMF20TMF25

−TMA20TMA25

162025

−6／−17− 7−20

RELATION BETWEEN BALL CIRCUITS AND LOAD RATING

D-4 D-5

TOPBALLTOPBALL

Examples of MountingFigures D-4 to D-9 illustrate mounting methods as example.

A special TOPBALL is also available for anti-corrosive requirements. Please specify with a suffix "-SK" for either TOPBALL or TOPBALL Unit part number. The load plates are electroless nickel plated and balls are made of stainless steel.

ANTI-CORROSIVE TYPE

Figure D-4 Use of Holding Plates

Figure D-7 Open Type

Figure D-5 Clearance Adjustable Type

Figure D-8 Press Fit (TK type)

Figure D-6 Use of Retaining Rings

Figure D-9 Pin Fixing

* Please fix by the pin for open type housing .

* Please contact NB for SA type support rails' compatibility with the TOPBALL units.

magnified A

A

Table D-7

−ＳＫ

part numbermaterial

load plateelectroless nickel plate

ball elementstainless steel

Rotational motion not supportedThe NB TOPBALL is designed only for linear motion, so that for applications in which a combination of linear and rotational motion is a requirement, Stroke Bush (P. E-2), Slide Rotary Bush (P. E-10), or Rotary Ball Spline (P. B-32) are recommended.

Self AlignmentWhen used with a single bearing on a single shaft or with a single bearing each on 2 shafts, Self-Alignment causes either shafts or bearings to tilt. To avoid tilting, 2 shafts with 2 bearings on each shaft is recommended. Non-self aligned "ST" type is available only for Euro Metric TK type TOPBALL in size 12 to 40. Please contact NB for details.Operating Temperature RangeThe operating temperature range is from -20℃ to 80 ℃ . In case of operation at a temperature outside of this range, please contact NB.

Dust PreventionForeign particles and dust in the NB TOPBALL affect the motion accuracy and shorten product life. Standard seals will perform well for dust prevention under normal operating conditions, however, in harsh environment it may be necessary to attach protective covers.

LubricationIt is important to lubricate the NB TOPBALL for an accurate operation and for a long life. Anti-rust oil is applied to the NB TOPBALL prior to shipment only. The NB selected anti-rust oil has a little to no effect on lubricants, however, please apply lubricant after cleaning the TOPBALL, for example, using kerosene, etc. For grease lubrication, lithium soap-based grease is recommended. A special low dust generating grease is also available for clean room application. Please refer to page Eng-40 for details.

Operating SpeedThe maximum speed is 5m/s. Product life time may be shortened if operating speed is more than 3m/s due to wear of resin components. Please set applied load coefficient and static safety factor with a margin.

Figure D-10　

USE AND HANDLING PRECAUTIONS

D-6 D-7

TOPBALLTOPBALL

TK TYPE－ TOPBALL Metric Type －　　　　

part number structure Self-aligning 1° in all directions

F: pin hole

TK12-OP

TK25-OP

TK16-OP, TK20-OP

Self-Aligning Type

TK30-OP, TK40-OPTK50-OP

W WB

J JF

h h

h h

θ θ

θ θ

F

FF JJ

L

1°

7°

D1D

G G

dr

Non Self-Aligning Type

W WBL

D1D

dr

1N≒0.102kgf

dynamicCN

staticCoN

open typemajor dimensionspart number

TK 8TK10TK12TK16TK20TK25TK30TK40TK50

number of ball circuits

massg

＋ 80

＋ 9− 1＋11− 1＋13−2

−−173548

103177275520

basic load rating

81012162025304050

161922263240476275

D

mm mm2529323645586880

100

±0.2

tolerancemm

Lshaft

diameter

mm8

1012162025304050

mmtolerance

mm16.522.022.924.931.544.152.160.677.6

0 −0.2

0 −0.3

423750

1,0201,2502,0903,7805,4706,590

10,800

534935

1,2901,5502,6304,7206,8108,230

13,500

inner contact diameter (dr)

example TK UU

closed type

20 - OP - -ST SK

TK type

sealblank: without sealUU: seals on both sides

blank: closedOP: open

self aligningblank: self-aligningST: non self-aligning＊

blank: standardSK: anti-corrosion※

mmtolerance

μm

dr＊

massg

−−

TK12-OPTK16-OPTK20-OPTK25-OPTK30-OPTK40-OPTK50-OP

−−4455555

7.213.9212654

122193354615

455566666

One-sided seal is also available. Please contact NB for details.* Based on nominal housing bore

B open typeW

mm

D1

mmh

mmθ FH11

mmG

mmJ

mm1.11.31.31.31.61.851.852.152.65

15.2182124.930.337.544.55972

−−

6.5 9 911.51419.522.5

−−

66° 68° 55° 57° 57° 56°54°

−−

3

5

−−−−−1.521.52.5

−−0.71.01.01.51.72.42.7

TK type TK-OP type

※For anti-corrosion the load plates are electroless nickel plated with stainless steel balls.＊ST option is available for size 12 to 40


D-8 D-9

TOPBALLTOPBALL

TW TYPE － TOPBALL Inch Type －　　　　

part number structure

TW type TW-OP type

1inch=25.4mm1lbs≒0.454kg1lbf≒4.448N

dynamicClbf

staticColbf

part number major dimensions basic load rating nominalshaft

diameterinchinch

toleranceinch

closed typetolerance

inch

* Based on nominal housing bore** Seals are not available on TW3.*** One-sided seal is also available. Please contact NB for details.

B open typeW

inch

D1

inchh

inchF

inchG

inchJ

inch

open type

TW　 3TW 　4TW 　6TW 　8TW 10TW 12TW 16TW 20TW 24TW 32


masslbs

0 -.0005

0 -.0006

0/-.0008

− − −

.033

.083

.102

.220

.419

.6391.168

.1875

.2500

.3750

.5000

.6250

.75001.00001.25001.50002.0000

.3750

.5000

.6250

.87501.12501.25001.56252.00002.37503.0000

D

inch inch.562.750.8751.2501.5001.6252.2502.6253.0004.000

±.0080

-.015

0 -.020

0/-.0250/-.0300/-.040

toleranceinch

L

inch

dr＊masslbs

−− −

TW 　8-OPTW 10-OPTW 12-OPTW 16-OPTW 20-OPTW 24-OPTW 32-OP

− − − 3 4 5 5 5 5 5

.004

.009

.014

.043

.103

.123

.265

.485

.7501.411

4 4 4 4 5 6 6 6 6 6


3/161/43/81/25/83/41

1-1/41-1/2

2

− 0

-.015

0 -.020

0/-.0250/-.0300/-.040

35 60 95

230 400 470 850

1,230 1,480 2,430

47 80

120 290 500 590

1,060 1,530 1,850 3,040

− − −

.313

.375

.438

.563

.625

.7501.000

− .4687.5880.8209

1.05901.17601.46871.88592.23892.8379

− − −

.136

.105

.136

.136

.201

.201

.265

− − −

.6250

.1250

.1250

.1250

.1875

.1875

.3125

− − −

through.0390.0590.0470.0900.0900

through

− .0390.0390.0459.0559.0559.0679.0679.0859.1029

− .515.7031.0321.1121.2721.8862.0112.4223.206

TW 8-OP TW10-OP TW12-OP thru TW32-OP

120°

h30°

.125

F

h G15°

30°

72°

72°26°

J F

h G

8°60°

60°

30°

J

F

J

G

Self-aligning 1°in all directions

D1D

W WBL

dr

1°

size

example TW UU20 - OP - SK

TW typesealblank: without sealUU: seals on both sides

blank: closedOP: open


※For anti-corrosion the load plates are electroless nickel plated with stainless steel balls.

D-10 D-11

TOPBALLTOPBALL

TKA TYPE(Euro Standard)－ Block Type －


M6×1 depth 8(oil hole)

NB mark

An oil hole is not provided on size 8, 10, 12, and 16.

C±0.15B±0.15E±0.015

h±0.015

4-M

f

K

T

GF

W

4-S

L

Y

X

self-aligning 1°in all directions(self-aligning type)

inner contact diameter

example TKA UU30 - -ST SK

TKA typesealblank: without sealUU: seals on both sides

self aligningblank: self-aligningST: non self-aligning＊


※For anti-corrosion the load plates are electroless nickel plated with stainless steel balls.＊ST option is available for size 12 to 40

TKA-W TYPE(Euro Standard)－ Double-Wide Block Type －


W

4-M

4-φS

B±0.15E±0.015

T

f

G

F

h±0.015

NB mark

K

C±0.15

MO M6×1 depth 8(oil hole)

Y

L

double-wide type

example TKA UU30 - SK

inner contact diameter sealblank: without sealUU: seals on both sides



W

TKA type

part number

basic load ratingdynamic

CN

staticCoN

S

mm

mass

g

allowablestatic

momentMoN･m

f

mm

MC

mm

K

mm

B

mm

Y

mm

T

mm

G

mm

F

mm

L

mm

W

mm

E

mm

h

mm

mounting dimensionsmajor dimensionsinner contact diameter

mmTKA 8WUUTKA10WUUTKA12WUUTKA16WUUTKA20WUUTKA25WUUTKA30WUUTKA40WUU

810121620253040

1516182225303545

17.52021.526.5303943.554

35404353607887

108

62707684

104130152176

2831.5354250607090

2225283542485872

5555578

10

6.5 7 7.5 9.5 9 10 11.5 14

2529324045606886

505256647694

106124

5 5.5 5.5 6.5 7.5 9 9.5 11

M4M5M5M6M8M10M10M12

911111318222226

3.34.34.35.36.68.48.4

10.5

6851,2151,6522,0253,3906,1208,860

10,680

1,0681,8702,5803,1005,2609,440

13,62016,460

119175227390630

1,2101,8803,280

6.53 13.4 20.9 28.2 62.0 149 247 3491N≒0.102kgf

part number


CN

staticCoN

S

mm

mass

g

f

mm

MC

mm

K

mm

B

mm

Y

mm

X

mm

T

mm

G

mm

F

mm

L

mm

W

mm

E

mm

h

mm


mm

1N≒0.102kgf

TKA 8UUTKA10UUTKA12UUTKA16UUTKA20UUTKA25UUTKA30UUTKA40UUTKA50UU

81012162025304050

151618222530354550

17.52021.526.5303943.55466

35404353607887

108132

3236394354677991

113

2831.5354250607090105

222528354248587285

5555578

1012

−−−−

1922.52626.543.5

−−−−

91011.51412.5

2529324045606886

108

202023263240455850

5 5.5 5.5 6.5 7.5 9 9.5 1112

M4M5M5M6M8M10M10M12M16

91111131822222634

3.34.34.35.36.68.48.4

10.513.5

423750

1,0201,2502,0903,7805,4706,59010,800

534935

1,2901,5502,6304,7206,8108,23013,500

5990

116205326624980

1,6702,950

D-12 D-13

TOPBALLTOPBALL

TKE TYPE(Euro Standard)－ Open Block Type －


self-aligning 1°in all directions(self-aligning type)

L

XC±0.15

W

Rθ

4-M

4-φS4-φP

B±0.15KE±0.015

YT

f

J

F h±0.015


NB mark

part number


example TKE UU30 - -ST SK

TKE typesealblank: without sealUU: seals on both sides

self aligningblank: self-aligningST: non self-aligning


basic load ratingmounting dimensionsmajor dimensions


1N≒0.102kgf

TKE-W TYPE(Euro Standard)－ Double-Wide Open Block Type －


LC±0.15

W

Rθ

4-M

4-φS4-φP

B±0.15E±0.015

YT

f

J

F h±0.015


NB mark

K

MO

double-wide type

example TKE UU30 - SK




W

TKE type

part number


CN

staticCoN

S

mm

mass

g

allowablestatic

momentMoN･m

f

mm

MC

mm

K

mm

B

mm

Y

mm

T

mm

R

mm

F

mm

L

mm

W

mm

E

mm

h

mm


mmTKE12WUUTKE16WUUTKE20WUUTKE25WUUTKE30WUUTKE40WUU

121620253040

182225303545

21.526.5303943.554

43 53 60 78 87108

76 84104130152176

283542516077

6.5 9 911.51419.5

5 5 5 7 810

7.5 9.5 91011.514

324045606886

56 64 76 94106124

5.5 6.5 7.5 9 9.5 11

M5M6M8M10M10M12

111318222226

4.3 5.3 6.6 8.4 8.410.5

1,6522,0253,3906,1208,860

10,680

2,5803,1005,2609,440

13,62016,460

190312505

1,0501,6302,880

11.3 15.2 35.3 85.2 140 1991N≒0.102kgf

θ

66°68°55°57°57°56°

P

mm 8 9.511141417.5

J

mm 4.5 5.5 6.5 8.6 8.610.8

TKE12UUTKE16UUTKE20UUTKE25UUTKE30UUTKE40UUTKE50UU

12162025304050

18222530354550

21.526.5303943.55466

43 53 60 78 87108132

394354677991

113

28354251607788

6.5 9 911.51419.522.5

5 5 5 7 81012

14.515.51922.52626.543.5

7.5 9.5 91011.51412.5

324045606886

108

23263240455850

M5M6M8M10M10M12M16

11131822222634

4.3 5.3 6.6 8.4 8.410.513.5

1,0201,2502,0903,7805,4706,590

10,800

1,2901,5502,6304,7206,8108,230

13,500

99175275558860

1,4902,500

66°68°55°57°57°56°54°

5.5 6.5 7.5 9 9.51112

8 9.511141417.520

4.5 5.5 6.5 8.6 8.610.813

dynamicCN

staticCoN

S

mm

mass

g

f

mm

MC

mm

B

mm

Y

mm

X

mm

T

mm

R

mm

F

mm

L

mm

W

mm

E

mm

h

mm

θ P

mm

J

mm

inner contact

diameter

mm

K

mm

D-14 D-15

TOPBALLTOPBALL

TKD TYPE(Euro Standard)－ Clearance Adjustable Open Block Type －


self-aligning 1° in all directions(self-aligning type)

L

XC±0.15

W

GRθ

4-M

4-φS4-φP

B±0.15E±0.015

YZ

T

f

J

F h±0.015


NB mark

K


example TKD UU30 - -ST SK

TKD typesealblank: without sealUU: seals on both sides

self aligningblank: self-aligningST: non self-aligning



TKD-W TYPE(Euro Standard)－ Clearance Adjustable Double-Wide Open Block Type －


L

A N

C±0.15W

GRθ

4-M

4-φS4-φP

B±0.15E±0.015

YZ

T

f

J

F h±0.015


NB mark

K

MO

double-wide type

example TKD UU30 - SK




W

TKD type

part number


CN

staticCoN

S

mm

mass

g

f

mm

MC

mm

K

mm

B

mm

Y

mm

X

mm

G

mm

R

mm

F

mm

L

mm

W

mm

E

mm

h

mm

mounting dimensionsmajor dimensionsinner

contact

diameter

mm

1N≒0.102kgf

θ P

mm

J

mm

Z

mm

T

mm

part number


CN

staticCoN

S

mm

mass

g

allowablestatic

momentMoN･m

f

mm

MC

mm

K

mm

B

mm

Y

mm

T

mm

R

mm

F

mm

L

mm

W

mm

E

mm

h

mm

mounting dimensionsmajor dimensionsinner

contact

diameter

mmTKD12WUUTKD16WUUTKD20WUUTKD25WUUTKD30WUUTKD40WUU

121620253040

182225303545

21.526.5303943.554

43 53 60 78 87108

76 84104130152176

283542516077

6.5 9 911.51419.5

5 5 5 7 810

7.5 9.5 91011.514

324045606886

56 64 76 94106124

5.5 6.5 7.5 9 9.5 11

M5M6M8M10M10M12

111318222226

4.3 5.3 6.6 8.4 8.410.5

1,6522,0253,3906,1208,860

10,680

2,5803,1005,2609,440

13,62016,460

190312505

1,0501,6302,880

11.3 15.2 35.3 85.2 140 1991N≒0.102kgf

θ

66°68°55°57°57°56°

P

mm 8 9.511141417.5

J

mm11.51418222633

G

mm3.23.245.55.55

Z

mm 5 6 8101215

19.521.52733.539.545.5

A

mm

N

mm374150637385

TKD12UUTKD16UUTKD20UUTKD25UUTKD30UUTKD40UUTKD50UU

12162025304050

18222530354550

21.526.5303943.55466

43 53 60 78 87108132

394354677991113

28354251607788

6.5 9 911.51419.522.5

3.23.245.55.557

14.515.51922.52626.543.5

7.5 9.5 91011.51412.5

324045606886108

23263240455850

5.5 6.5 7.5 9 9.5 1112

M5M6M8M10M10M12M16

11131822222634

4.3 5.3 6.6 8.4 8.410.513.5

1,0201,2502,0903,7805,4706,590

10,800

1,2901,5502,6304,7206,8108,230

13,500

99175275558860

1,4902,450

66°68°55°57°57°56°54°

8 9.511141417.520

11.5141822263339

5 6 810121517

5 5 5 7 81012

D-16 D-17

TOPBALLTOPBALL

TMF TYPE－ Tolerance interchangeable with　 Asian Metric Slide Bush Type －

TMA TYPE－ Tolerance interchangeable with　 Asian Metric Slide Bush Type －

C±0.2B±0.2

W

K

E±0.02

h±0.02

T f

F

G

L

NB mark

4-S2

4-S1

Self-aligning 1°

in all directions

partnumber


CN

staticCoN

shaftdiameter

mm

mass

g

inner contact diameterRecommended shaft

diameter：g6mm

hmm

Emm

Wmm

Lmm

Fmm

Gmm

Tmm

Bmm

Cmm

Kmm

S1 fmm

S2

mm

outer dimensions mounting dimensionsmajor dimensions

TMA20CUUTMA25CUU

2025

2126

2738

5476

5367

4151.5

3542

1112

4054

4050

711

M6M8

1218

5.27

2025

221475

2,6304,720

2,0903,780

1N≒0.102kgf

partnumber


CN

staticCoN

shaftdiameter

mm

mass

g

numberof ballcircuits

drRecommended shaft

diameter：g6mm mm

toleranceμm

L

mmDfmm

tmm

P.C.Dmm

X×Y×Zmm

D flangemajor dimensions

TMF16CUUTMF20CUUTMF25CUU

566

162025

324045

435467

546274

8 810

162025

216347488

1,5502,6304,720

1,2502,0903,780

1N≒0.102kgf

5.5×9×5.15.5×9×5.16.6×11×6.1

435160

0−25

P.C.D.mounting hole×4

dr

Self-aligning 1°

in all directions

DfD

X

Z

Y

tL

part number structure part number structure

inner contact diameter inner contact diameter

example exampleTMF TMAC C25 25- -UU UU

TMF type TMA type

with snap ring with snap ring



D-18 D-19

TOPBALLTOPBALL

TWA TYPE(Inch Standard)－ Block Type －

TWA-W TYPE(Inch Standard)－ Double-Wide Block Type －


NB mark

self-aligning 1°in all directions

B±.01KW

E±.0012

TG

h±.0012

F

LC±.014-S

oil hole*M

MO

B±.01KW

E±.0012

TG h±

.0012

F

LC±.01

4-S

oil hole*M NB mark

partnumber

partnumber

size

example TWA UU20 - SK

TWA typesealblank: without sealUU: seals on both sides


basic load rating basic load ratingmass

lbs

mass

lbs

allowablestatic

momentMo

Ibf･in

h

inch

h

inch

E

inch

E

inch

W

inch

W

inch

L

inch

L

inch

F

inch

F

inch

T

inch

T

inch

G

inch

G

inch

M

inch

M

inch

B

inch

B

inch

C

inch

K

inch

C

inch

K

inch

S

inch

S

inch

dynamicClbf

dynamicClbf

staticColbf

staticColbf

mounting dimensions mounting dimensionsmajor dimensions major dimensions

TWA 4UUTWA 6UUTWA 8UUTWA 10UUTWA 12UUTWA 16UUTWA 20UUTWA 24UUTWA 32UU

TWA 　4WUUTWA 　6WUUTWA 　8WUUTWA 10WUUTWA 12WUUTWA 16WUUTWA 20WUUTWA 24WUU

1/43/81/25/83/41

1-1/41-1/2

2

1/43/81/25/83/41

1-1/41-1/2

.4370

.5000

.6870

.8750

.93701.18701.50001.75002.1250

.4370

.5000

.6870

.8750

.93701.18701.50001.7500

.8125

.87501.00001.25001.37501.62502.00002.37503.0000

.8125

.87501.00001.25001.37501.62502.00002.3750

1.6251.7502.0002.5002.7503.2504.0004.7506.000

1.6251.7502.0002.5002.7503.2504.0004.750

1.1881.3131.6881.9382.0632.8133.6254.0005.000

2.5002.7503.5004.0004.5006.0007.5009.000

.813

.9381.2501.6251.7502.1882.8133.2504.063

.813

.9381.2501.6251.7502.1882.8133.250

.188

.188

.250

.281

.313

.375

.438

.500

.625

.188

.188

.250

.281

.313

.375

.438

.500

.750

.8751.1251.4371.5631.9382.5002.8753.625

.750

.8751.1251.4371.5631.9382.5002.875

1.0001.1251.3751.7501.8752.3753.0003.5004.500

1.0001.1251.3751.7501.8752.3753.0003.500

1.3121.4371.6882.1252.3752.8753.5004.1255.250

1.3121.4371.6882.1252.3752.8753.5004.125

.750

.8751.0001.1251.2501.7502.0002.5003.250

.156

.156

.156

.188

.188

.188

.250

.313

.375

2.0002.2502.5003.0003.5004.5005.5006.500

.156

.156

.156

.188

.188

.188

.250

.313

.156

.156

.156

.188

.188

.219

.219

.281

.406

.156

.156

.156

.188

.188

.219

.219

.281

60 95

230 400 470 850

1230 1480 2430

96 150 370 640 750

1360 1970 2370

80 120 290 500 590

1060 1530 1850 3040

160 240 580

1000 1180 2120 3060 3700

.090

.120

.248

.465

.5531.2002.3803.4606.830

.190

.250

.5101.0001.2002.4005.0007.800

26.8 52.2 183 373 496126021002900

※For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. ※For anti-corrosion the load plates are electroless nickel plated with stainless steel balls.



1lbf・in≒0.112N・m

nom.shaft dia.inch

nom.shaftdia.inch

* Provided with push-in oil fitting for 1/4" to 1/2" sizes. Sizes from 5/8" to 2" offer a 1/4-28 tapped hole with a plug for adding a fitting if desired. Product of NB Corporation of America　

* Provided with push-in oil fitting for 1/4" to 1/2" sizes. Sizes from 5/8" to 1-1/2" offer a 1/4-28 tapped hole with a plug for adding a fitting if desired. Product of NB Corporation of America

double-wide type

example TWA UU20 - SK

size sealblank: without sealUU: seals on both sides


W

TWA type

D-20 D-21

TOPBALLTOPBALL

TWJ TYPE(Inch Standard)－ Clearance Adjustable Block Type －

TWJ-W TYPE(Inch Standard)－ Clearance Adjustable Double-Wide Block Type －



oil hole*

B±.01KW

E±.0012

M

TG h±

.0012

F

C±.01L

4-S

NB mark

MO

B±.01KW

E±.0012

M

TG h±

.0012

F

oil hole*

C±.01L

4-S

NB mark

part number part number

size

example TWJ UU20 - SK

TWJ typesealblank: without sealUU: seals on both sides



lbs

allowablestatic

momentMo

Ibf･in

mass

lbs

h

inch

h

inch

E

inch

E

inch

W

inch

W

inch

L

inch

L

inch

F

inch

F

inch

T

inch

T

inch

G

inch

G

inch

M

inch

M

inch

B

inch

B

inch

C

inch

K

inch

C

inch

K

inch

S

inch

S

inch

dynamicClbf

dynamicClbf

staticColbf

staticColbf


TWＪ　4UUTWＪ　6UUTWＪ　8UUTWＪ 10UUTWＪ 12UUTWＪ 16UUTWＪ 20UUTWＪ 24UUTWＪ 32UU

TWＪ　4ＷUUTWＪ　6ＷUUTWＪ　8ＷUUTWＪ 10ＷUUTWＪ 12ＷUUTWＪ 16ＷUUTWＪ 20ＷUUTWＪ 24ＷUU

1/43/81/25/83/41

1-1/41-1/2

2

1/43/81/25/83/41

1-1/41-1/2

.4370

.5000

.6870

.8750

.93701.18701.50001.75002.1250

.4370

.5000

.6870

.8750

.93701.18701.50001.7500

.8125

.87501.00001.25001.37501.62502.00002.37503.0000

.8125

.87501.00001.25001.37501.62502.00002.3750

1.6251.7502.0002.5002.7503.2504.0004.7506.000

1.6251.7502.0002.5002.7503.2504.0004.750

1.1881.3131.6881.9382.0632.8133.6254.0005.000

2.5002.7503.5004.0004.5006.0007.5009.000

.813

.9381.2501.6251.7502.1882.8133.2504.063

.813

.9381.2501.6251.7502.1882.8133.250

.188

.188

.250

.281

.313

.375

.438

.500

.625

.188

.188

.250

.281

.313

.375

.438

.500

.750

.8751.1251.4371.5631.9382.5002.8753.625

.750

.8751.1251.4371.5631.9382.5002.875

1.0001.1251.3751.7501.8752.3753.0003.5004.500

1.0001.1251.3751.7501.8752.3753.0003.500

1.3121.4371.6882.1252.3752.8753.5004.1255.250

1.3121.4371.6882.1252.3752.8753.5004.125

.750

.8751.0001.1251.2501.7502.0002.5003.250

.156

.156

.156

.188

.188

.188

.250

.313

.375

2.0002.2502.5003.0003.5004.5005.5006.500

.156

.156

.156

.188

.188

.188

.250

.313

.156

.156

.156

.188

.188

.219

.219

.281

.406

.156

.156

.156

.188

.188

.219

.219

.281

60 95

230 400 470 850

1230 1480 2430

96 150 370 640 750

1360 1970 2370

80 120 290 500 590

1060 1530 1850 3040

160 240 580

1000 1180 2120 3060 3700

.090

.120

.248

.465

.5531.2002.3803.4606.830

26.8 52.2 183 373 496126021002900

.190

.250

.5101.0001.2002.4005.0007.800



nom.shaft dia.inch

nom.shaftdia.inch

* Provided with push-in oil fitting for 1/4" to 1/2" size. Sizes from 5/8" to 2" offer a 1/4-28 tapped hole with a plug for adding a fitting if desired. Product of NB Corporation of America

* Provided with push-in oil fitting for 1/4" to 1/2" size. Sizes from 5/8" to 1-1/2" offer a 1/4-28 tapped hole with a plug for adding a fitting if desired. Product of NB Corporation of America

double-wide type

example TWJ UU20 - SK



W

TWJ type



D-22 D-23

TOPBALLTOPBALL

TWD TYPE(Inch Standard)－ Open Block Type －

TWD-W TYPE(Inch Standard)－ Double-Wide Open Block Type －



4-S B±.01KW

E±.0012

C±.01L

h1

G M

Th±.0012

oil hole*30°

F

NB mark

MO

4-S B±.01KW

E±.0012

h1

G M

Th±.0012

oil hole*

C±.01L

30°

F

NB mark

partnumber

partnumber

size

example TWD UU20 - SK

TWD typesealblank: without sealUU: seals on both sides



lbs

allowablestatic

momentMo

Ibf･in

mass

lbs

h

inch

h

inch

E

inch

E

inch

W

inch

W

inch

L

inch

L

inch

F

inch

F

inch

T

inch

T

inch

G

inch

G

inch

M

inch

M

inch

h1

inch

h1

inch

B

inch

B

inch

C

inch

K

inch

K

inch

C

inch

S

inch

S

inch

dynamicClbf

dynamicClbf

staticColbf

staticColbf


TWＤ　8UUTWＤ 10UUTWＤ 12UUTWＤ 16UUTWＤ 20UUTWＤ 24UUTWＤ 32UU

TWＤ 8ＷUUTWＤ 10ＷUUTWＤ 12ＷUUTWＤ 16ＷUUTWＤ 20ＷUUTWＤ 24ＷUU

1/25/83/41

1-1/41-1/2

2

1/25/83/41

1-1/41-1/2

.6870

.8750

.93701.18701.50001.75002.1250

.6870

.8750

.93701.18701.50001.7500

1.0001.25001.37501.62502.00002.37503.0000

1.0001.25001.37501.62502.00002.3750

2.0002.5002.7503.2504.0004.7506.000

2.0002.5002.7503.2504.0004.750

1.5001.7501.8752.6253.3753.7504.750

3.5004.0004.5006.0007.5009.000

1.1001.4051.5351.9752.4852.9103.660

1.1001.4051.5351.9752.4852.910

.250

.281

.315

.375

.437

.500

.625

.250

.281

.315

.375

.437

.500

.688

.875

.9371.1881.5001.7502.250

.688

.875

.9371.1881.5001.750

.861.061.121.401.882.122.70

.861.061.121.401.882.12

.260

.319

.386

.512

.596

.681

.933

.260

.319

.386

.512

.569

.681

1.6882.1252.3752.8753.5004.1255.250

1.6882.1252.3752.8753.5004.125

1.0001.1251.2501.7502.0002.5003.250

.156

.188

.188

.188

.250

.313

.375

.156

.188

.188

.188

.250

.313

2.5003.0003.5004.5005.5006.500

.156

.188

.188

.218

.218

.281

.406

.156

.188

.188

.218

.218

.281

230 400 470 850

1230 1480 2430

370 640 750

1360 1970 2370

290 500 590

1060 1530 1850 3040

580 1000 1180 2120 3060 3700

.188

.365

.4521.0101.9802.9505.840

128 164 283 719

1200 1650

.400

.8001.0002.0004.2006.700



nom.shaft dia.inch

nom.shaft dia.inch

* Provided with push-in oil fitting for 1/2" size only. Sizes from 5/8" to 2" offer a 1/4-28 tapped hole with a plug for adding a fitting if desired. Product of NB Corporation of America

* Provided with push-in oil fitting for 1/2" size only. Sizes from 5/8" to 1-1/2" offer a 1/4-28 tapped hole with a plug for adding a fitting if desired. Product of NB Corporation of America

double-wide type

example TWD UU20 - SK



W

TWD type



D-24 D-25

TOPBALLTOPBALL

TOPBALL - NB Corporation...rotational motion of ball elements. NB's self-aligning TOPBALL can be...

Documents

Transcript of TOPBALL - NB Corporation...rotational motion of ball elements. NB's self-aligning TOPBALL can be...