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On domestic & commercial window control equipment
Sash balances

Sash balances
How to work out the correct type of balance required

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Window Remote Control Systems

Graphic of sash balance

Sash balances

Unique sash balances

Download this information as a printable PDF: Sash balances (PDF, 737 kB)

Specification chart

Graphic of specification chart

How to order

The correct type of balance required is governed by the size of the sashes. When ordering, give the following information concerning the particular type of windows for which balances are required.


Measuring the window

Graphic showing how to measure a window
Figure 1. The way to measure a window

Figure 1 shows the way to measure a window to give the information required when ordering.

  1. Total height - distance from sill to head measured inside frame.
  2. Top sash height - measured outside top and bottom rails.
  3. Bottom sash height - measured outside top and bottom rail.
  4. Width of sashes - measured outside the stiles.
  5. Weight of each sash - if weight of sash is not available state thickness of glass.

Feet

Graphic of available feet

Note:

  1. Prices are listed for Standard Length Sash Balances.
  2. HA-1 feet will be supplied standard. HA-2 and UC-1 feet available upon request.
  3. Colours: white, brown, black. Available upon request.

Types

Graphic of type D
Type D
Graphic of type A
Type A
Graphic of type B
Type B
Graphic of type HD
Type HD
Graphic of type M
Type M

Type D

  • Standard
  • 9/16" 14mm diameter
  • Residential, Commercial, Grooving
  • 5/8" x 5/8" 16mm x 16mm
  • Sash weight to 30lbs, 13.6kg

Type A

  • 3/8" 9.5mm diameter
  • Residential, Grooving
  • 7/16" x 7/16" 11mm x 11mm
  • Sash weight to 20lbs, 9kg

Type B

  • 1/2" 12.4mm diameter
  • Residential, Commercial, Grooving
  • 9/16" x 9/16" 14mm x 14mm
  • Sash weight up to 30lbs, 13.6kg

Type HD

  • 9/16" 14mm diameter
  • Residential, Commercial, Grooving
  • 5/8" x 5/8" 16mm x 16mm
  • Sash weight up to 40lbs, 18kg

Type M

  • Standard
  • 3/16" 20mm diameter
  • Residential, Commercial, Institutional, Grooving
  • 15/16" x 15/16" 24mm x 24mm
  • Sash weight from 30lbs to 60lbs, 14kg to 28kg
  • Price on application

Note: For matching top sash specify 50mm shorter than bottom sash.


Fitting Unique Sash Balances

Types

A

B

D HD-36-40

Sash Groove

 

A

11mm x 11mm

 

 

B

14mm x 14mm

 

 

D, HD

16mm x 16mm

N.B. Where top and bottom sashes are different heights, balances should be placed in the groove before sashes are fitted. When replacing, this may not be possible.

  1. Check that stops are fitted to top and bottom of window opening to stop sash from opening fully.
  2. The 2 short balances in a set of 4 are fitted to the top sash. The long ones to the bottom sash, length differential is 50mm.
  3. Fix balances at the top of window opening. Be sure they line up with the sash groove and are vertical.
  4. With bottom sash at it's highest position, wind sash attachment to the left until it retracts against the bottom rail of the sash. Pull the attachment down a few times. If it does not return to the bottom rail add another turn or two. Pull attachment down, without releasing the applied turns, and add three or more turns to the left. Temporarily attach sash.
  5. Repeat operations on the opposite side.
  6. Raise and lower sash. If it falls at the highest position, add a turn or two: if harder to pull down than to lift, release a turn, until the sash operates evenly up and down. Screw attachments firmly in position.
  7. Repeat operations for top sash.

DO NOT bend the spiral rod when applying turns.
DO NOT allow the sash attachment to foul the frame jamb.