Whitco Spiral Sash Balance No. 700 – 1080 mm Body, 7.25–10 kg, Standard Foot, Black W617002117
Whitco Spiral Sash Balance No. 700 – 1080 mm Body, 7.25–10 kg, Standard Foot, Black W617002117
A Whitco spiral sash balance is a narrow, fully-sealed spiral-and-torsion-spring balance that counter-balances the sash of a timber or aluminium double-hung window, holding it open at any height without a cord or weight. This is Balance No. 700 with a 1080 mm body, rated for the 7.25–10 kg weight range, supplied with the standard foot attached.
Key Features
Specifications
| Type | Spiral sash balance (double-hung windows) |
| Balance number | No. 700 |
| Body length (L) | 1080 mm |
| Closed dimension (C) | 1105 mm |
| Extended dimension (E) | 2134 mm |
| Weight range | 7.25–10 kg |
| Foot | Standard foot attached |
| Tube colour | Black |
| Spring | Oil-tempered carbon steel torsion spring |
| Spiral | Zinc-plated variable pitch |
| Casing | ABS polymer; zinc diecast fixing plug; stainless-steel foot plate |
| Recommended rebate | 15 × 15 mm |
| Origin | Australian made |
| Whitco code | W617002117 |
How to Choose the Right Balance
If you're replacing a balance, measure the body length of the old unit and match the 'L' dimension in the size chart below. For a new top sash, measure the overall sash height including horns (the Closed 'C' dimension) and pick the balance whose C matches, or the next smaller. For a bottom sash, measure the window opening height from sill to head (the Extended 'E' dimension) and pick the balance whose E matches, or the next larger.
Weigh the sash, or estimate it from the glass thickness (see the guide below). Match the weight to Range 1 (2.25–7.25 kg), Range 2 (7.25–10 kg) or Range 3 (10–14 kg).
Choose the standard foot attached, or 'no foot' to fit an adjustable foot (ordered separately, together with the tension key).
Whitco spiral balances are supplied in black only.
Working Out the Sash Weight
| Glass thickness | Weight per m² |
|---|---|
| 3 mm | 7.5 kg/m² |
| 4 mm | 10.0 kg/m² |
| 5 mm | 12.5 kg/m² |
| 6 mm | 15.0 kg/m² |
| Double-glazed 6+6 mm | 30.0 kg/m² |
Multiply the weight per m² by the sash glass area (double the figure for double-glazed), then add an allowance for the sash frame. Best practice is to weigh the sash for an accurate result.
Spiral Balance Size Chart
| Balance No. | Body length (L) | Closed (C) | Extended (E) |
|---|---|---|---|
| No. 110 | 292 mm | 318 mm | 559 mm |
| No. 200 | 318 mm | 343 mm | 610 mm |
| No. 220 | 343 mm | 368 mm | 660 mm |
| No. 240 | 368 mm | 394 mm | 711 mm |
| No. 260 | 394 mm | 419 mm | 762 mm |
| No. 280 | 419 mm | 445 mm | 813 mm |
| No. 210 | 445 mm | 470 mm | 864 mm |
| No. 300 | 470 mm | 495 mm | 914 mm |
| No. 320 | 495 mm | 521 mm | 965 mm |
| No. 340 | 521 mm | 546 mm | 1016 mm |
| No. 360 | 546 mm | 572 mm | 1067 mm |
| No. 380 | 572 mm | 597 mm | 1118 mm |
| No. 310 | 597 mm | 622 mm | 1168 mm |
| No. 400 | 622 mm | 648 mm | 1219 mm |
| No. 420 | 648 mm | 673 mm | 1270 mm |
| No. 440 | 673 mm | 699 mm | 1321 mm |
| No. 460 | 699 mm | 724 mm | 1372 mm |
| No. 480 | 724 mm | 749 mm | 1422 mm |
| No. 410 | 749 mm | 775 mm | 1473 mm |
| No. 500 | 775 mm | 800 mm | 1524 mm |
| No. 520 | 800 mm | 826 mm | 1575 mm |
| No. 540 | 826 mm | 851 mm | 1626 mm |
| No. 560 | 851 mm | 876 mm | 1676 mm |
| No. 580 | 876 mm | 902 mm | 1727 mm |
| No. 510 | 902 mm | 927 mm | 1778 mm |
| No. 600 | 927 mm | 953 mm | 1829 mm |
| No. 620 | 953 mm | 978 mm | 1880 mm |
| No. 640 | 978 mm | 1003 mm | 1930 mm |
| No. 660 | 1003 mm | 1029 mm | 1981 mm |
| No. 680 | 1029 mm | 1054 mm | 2031 mm |
| No. 610 | 1054 mm | 1080 mm | 2083 mm |
| No. 700 | 1080 mm | 1105 mm | 2134 mm |
| No. 720 | 1105 mm | 1130 mm | 2183 mm |
Closed 'C' = overall top-sash height (including horns). Extended 'E' = window opening height, sill to head. Match the dimension you can measure to pick the balance number.
Feet & Accessories
| Standard adjustable foot (Weight Range 1–3) | W615100 |
| TFD-type foot | W615200 |
| Super heavy-duty adjustable foot | W615300 |
| Tension key (for adjustable foot) | W492700 |
| Long stop | W493000 |
| Accessory kit (top + bottom stop + screws) | W492900 |
10-Year Warranty
How do I choose the right spiral balance for my window?
First get the length: if you're replacing one, measure the old balance's body length and match the 'L' dimension in the size chart. For a new top sash, measure the sash height including horns (Closed 'C') and pick that balance number or the next smaller; for a bottom sash, measure the opening height sill-to-head (Extended 'E') and pick that number or the next larger. Then pick the weight range (1, 2 or 3) from the sash weight, choose the foot option, and it comes in black.
How do I work out the sash weight?
Weigh the sash for the most accurate result, or estimate from the glass: 3 mm ≈ 7.5 kg/m², 4 mm ≈ 10, 5 mm ≈ 12.5, 6 mm ≈ 15, double-glazed 6+6 mm ≈ 30 kg/m². Multiply by the glass area and add an allowance for the frame, then match to Range 1 (2.25–7.25 kg), 2 (7.25–10 kg) or 3 (10–14 kg).
What does the balance number mean — why do the codes and lengths differ?
Each balance number is a specific length. This one, No. 700, has a 1080 mm body, a Closed 'C' dimension of 1105 mm and an Extended 'E' dimension of 2134 mm. A larger number is a longer balance for a taller sash, so the code and length change together — always match the number to your sash, not just the weight.
Standard foot or adjustable foot?
The standard foot comes attached. The 'no foot' version is supplied ready to accept an adjustable foot, which is ordered separately along with the tension key used to set the spring tension.
What's the difference between a spiral and a spring balance?
Both counter-balance a double-hung sash so it stays open at any height. A spiral balance uses a variable-pitch spiral and torsion spring in a fully sealed tube (timber or aluminium windows); a spring balance uses a tension spring and a friction foot (aluminium windows). They are not interchangeable — match the type to your existing window.
Is it in stock?
Whitco sash balances are supplied in black, which is normally held in stock with the supplier. If you need help matching the balance number, weight range or foot, call Prime Hardware on 1800 329 028.
What warranty applies?
Whitco products carry a 10-Year Warranty against defects in materials and workmanship, under the Australian Consumer Law. Manufactured by ASSA ABLOY Australia.
How can I get help?
Call Prime Hardware on 1800 329 028, email sales@primehardware.com.au, or visit the showroom at 2/249 Annangrove Road, Annangrove NSW 2156. Tell us your sash height, sash weight (or glass thickness) and window section and we'll match the exact balance, weight range and foot for you.
