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Era D4 Type Spiral Balance – 15lbs to 30lbs

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These D4 Type spiral balances are light duty, economical, general purpose balances which are perfect for domestic or commercial applications with a sash weight range of 6.8kgs (15lbs) to 13.6kgs (30lbs).

They are adjustable within their weight range to suit actual glazed sash weights using a special tension adjustment tool. On how to adjust the tension of the spring see FAQ’s.

Length

20-inch-508mm, 21-inch-533mm, 22-inch-559mm, 23-inch-584mm, 24-inch-610mm, 25-inch-635mm, 26-inch-660mm, 27-inch-686mm, 28-inch-711mm, 29-inch-737mm, 30-inch-762mm, 31-inch-787mm, 31931, 31932, 31933, 31934, 31935, 31936, 31954, 31955, 31956, 31957, 31958, 31959, 31960, 31961, 31962, 31963, 31964, 31965, 32-inch-813mm, 33-inch-838mm, 34-inch-864mm, 35-inch-889mm, 38-inch-965mm, 40-inch-1016mm
Diameter

15mm
Groove Dimension

16-17mm
Max Weight

31966
Foot Type

Supplied separately

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