Spiral Sash Balances: for timber, PVC and aluminium windows

Superior performance

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nSuitable for timber, PVC and aluminium windows

nPre-tensioned twin springs – reducing the need for on-site adjustment

nSuitable for domestic or commercial applications

nSemi-flexible outer tube – can be slightly bowed for easier installation

nSuitable for new or refurbished windows

nPeace of mind – comprehensive 10 year warranty

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Schlegel Spiral Sash Balances: ensuring easy sash operation

Schlegel design and manufacture an attractive and highly functional self-contained balancing device capable of maintaining the equilibrium of a sash window at any point in the travel of the sash.

Smooth and easy operation, in comparison to other methods of sash balancing, Schlegel sash balances are an ideal alternative to sash weights at a fraction of the cost. Spiral balance systems fit neatly into all building/reveal profiles and disregard the need for a box cavity therefore giving you a larger window opening.

The stainless steel spiral rod torsion and tension springs are made of high quality materials, giving long life to the spiral sash balances and years of trouble-free operation. We’ve been making spiral balances for windows for the past 40 years and believe our pride in the skills of our workforce is reflected in the quality of our output and dedication to continuous improvement of our product.

Sash balance selection It is important that the balances used are suitable for the weight of sash.

The relevant weight in kgs is printed on the tube or stamped on the foot attachment, check that the finished sash weight is within 0.5 kgs.

F Type K Type M Type

Weight capacity (kgs): 3.6 to 27.2 9 to 37.6 6.8 to 45.4

Plug type: Coloured plastic Natural plastic Metal

Tube diameter (mm): 17.5 19 22.5

Groove dimension: 18 20 23/24

Standard attachment

Tilt attachment

Below are the available plug colours with corresponding weight range in kgs.

Grey3.62 to 6.80

Natural17.69 to 20.41

Claret7.25 to 10.43

Orange20.86 to 22.68

Yellow10.88 to 14.06

Green23.13 to 24.94

Black14.51 to 17.23

Blue25.40 to 27.21

16

65

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Window preparation (cont.)2Bottom of the sashes should be prepared to suit the balance foot attachment to be used. Cut-outs to be of sufficient depth to receive attachments and screw heads.

Fig. 3

Fig. 5

Fig. 4

Fig. 6

Bottom rail preparation for standard ‘F’ balance foot.

Bottom rail preparation for standard ‘K’ and ‘M’ balance foot (grooved stile shown).

Stile preparation for channel fitting for standard ‘F’ balance foot (fix channel prior to fitting sash into frame).

Grooved stile preparation for channel fitting for standard ‘K’ and ‘M’ balance foot (fix channel prior to fitting sash into frame).

55

13

16

80

19

80

1 Window preparationProvision must be made to house each sash balance in a groove or channel. This can be either in the frame jamb (fig. 1), or in the sash stile (fig. 2), and must run the full length of the sash run. The groove must be of minimum dimensions shown in the table below.

Balance type F K M

Dimension X (mm): 17 21.5 26

Dimension Y (mm): 17 21.5 27

Fig. 1X

Y

Fig. 2

X

Y

ImPortant Don’t use balances on sashes beyond

their respective weight.

Don’t tension balances more than necessary.

Don’t tension balances before glazing.

Do keep the foot attachment tight into the sash and make sure that the covers of the fitting do not rub the jamb when the sash is moved.

Do fit correct travel stops.

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Installing to lower sash4Note that the longer pair of balances are normally for the lower sash, given sashes of equal height.

Fig. 8

Raise the sash as high as possible and secure in position, on the opposite side of the frame, with mole grip/clamp.

The foot of the balance attachment should now be visible below the sash.

Fig. 9

Using the woodscrews provided, fix the foot attachment to the underside of the bottom rail, ensuring that the balance is kept tight to the sash.

Fig. 7

With both sashes lowered, insert the balance in the groove.

Fit the top of the balance to the frame jamb at the centre of the groove up against the frame head, with the flat foot of the attachment against the jamb.

Fix using wood screws provided.

For unequal or very heavy sashes

Insert the balances into the groove, then from below the sash, insert the Adjustment Tool (available from Schlegel) into the brass thread at the bottom of the balance (note this is a left hand thread).

Using the tool, pull the foot attachment downwards and across under the bottom rail of the sash, fix (Fig. 9) and carefully remove the Adjustment Tool.

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Fig. 10

With both sashes lowered, insert the balance in the groove.

Fit the top of the balance to the frame jamb at the centre of the groove up against the frame head, with the flat foot of the attachment against the jamb.

Fix using wood screws provided.

Fig. 11

Raise the sash as high as possible and secure in position, on the opposite side of the frame, with mole grip/clamp.

Fig. 12

From below the sash, install the Adjustment Tool into the brass thread at the bottom of the balance.

Pull the balance foot down so that it can be located into the bottom of the channel and then carefully released.

Carefully remove the Adjustment Tool.

Installing to top sash5Note that the shorter pair of balances are normally for the top sash, given sashes of equal height.

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Tube Kgs 9 11.3 13.6 15.9 18.1 20.4 22 25 27.2 29.4 31.7 34 36.2 38.5 40.8 43.1 45.4length (ins) lbs 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 10020 2 0.5 1 1 2 2 2 3 3 3 4 1 2 2 2 3 324 2 0.5 1 1 2 2 2 3 3 3 4 2 2 2 3 3 428 2 1 1 2 2 2 2 3 3 4 5 2 2 3 4 4 432 2 1 2 2 2 3 3 4 4 5 6 2 3 3 4 4 536 3 2 2 2 3 3 3 4 4 6 7 3 3 4 5 5 540 3 2 2 2 3 4 4 5 5 7 8 3 4 4 5 5 644 4 2 2 3 3 4 4 5 5 7 8 3 4 4 5 6 648 4 2 3 3 4 5 5 6 6 8 9 4 5 5 6 6 752 5 3 3 3 4 5 5 6 6 8 9 4 5 5 6 7 756 5 3 3 4 4 5 5 6 6 9 9 4 5 5 7 7 860 6 3 3 4 5 6 6 7 7 9 10 5 6 6 7 8 864 6 3 3 4 5 6 6 7 7 9 10 5 6 6 7 8 968 7 4 4 5 6 6 6 8 8 10 11 6 6 7 8 9 972 7 4 4 5 6 7 7 8 9 10 11 6 7 7 8 9 10

F and K type adjustment

‘F’ and ’K’ balances are pre-tensioned and therefore should be correct weight for the sash, provided the information supplied was correct. If they do require adjusting, do so in accordance with section 7 of the ‘installation instructions’.

m type adjustment

For the ‘M’ balances please read the chart below and adjust in accordance with section 7 of the ‘installation instructions’.

Fitting travel stops tension adjustment6 7Fix the travel stops provided, the shorter one at the top of the bottom sash run.

Try the sashes up and down to the limit of their travel, if there is a tendency for either sash to drop when in the up position, adjust the balances as follows.

Insert a screwdriver into the slot in the ratchet fitting at the bottom of the balance.

Adjust by turning the ratchet in an anti-clockwise direction as viewed from the underside. Two clicks of the ratchet equal one complete turn.

Refer to the adjustment chart below for the number of turns to be added. Ensure that the same number of turns are applied to each balance pair, do not over tension.

In the case of non-standard applications special stops may be required. In such cases, suitable longer timber stops should be substituted for the standard metal type supplied. These should be long enough to prevent the balance from being extended by more than twice its tube length minus 2”.

Fig. 13Fig. 14 Fig. 15

25 standard

100 standard

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Care has been taken to ensure that the contents of this publication are accurate, but Schlegel and its subsidiary companies do not accept responsibility for errors or for information that is found to be misleading. Suggestions for, or description of, the end use or application of products or methods of working are for information only. All dimensions are in mm and are nominal. Schlegel reserve the right to change specification without prior notice.

Schlegel’s names and logos and all related trademarks (including ‘SCHLEGEL’ and ‘SCHLEGEL Red Square Logo’), trade names, and other intellectual property are the property of Schlegel Acquisition Holdings Limited trading as Schlegel International and cannot be used without its express prior written permission. All rights reserved.