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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... read more
Product Information

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.

Product Specification
  • Minimum sash weight - 6.8kgs (15lbs)
  • Maximum sash weight - 13.6kg (30lbs)
  • 21 lengths available ranging from 20" to 40"
  • Tube diameter - 16mm
  • Groove dimension - 17mm
  • Supplied as pairs
Product FAQs

How do I adjust the tension of the spring on this balance?

Spring tension is adjusted via the tensioning tool – our part code BALTENTOOL. Once the balance has been fitted onto the sash rotate the tang attachment into the tube anti-clockwise, using the tensioning tool pull the tang attachment downwards about 8” without it rotating.  Now apply adjustment via turning anti-clockwise, the amount of turns will depend on the sash weight.

All product options

All product options
Product Code Length DiscountPriceStockQuantity
D420004W
20 inch / 508mm
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D421004W
21 inch / 533mm
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D422004W
22 inch / 559mm
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D423004W
23 inch / 584mm
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D424004W
24 inch / 610mm
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D425004W
25 inch / 635mm
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D426004W
26 inch / 660mm
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D427004W
27 inch / 686mm
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D428004W
28 inch / 711mm
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D429004W
29 inch / 737mm
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D430004W
30 inch / 762mm
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D431004W
31 inch / 787mm
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D432004W
32 inch / 813mm
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D433004W
33 inch / 838mm
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D434004W
34 inch / 864mm
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D435004W
35 inch / 889mm
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D438004W
38 inch / 965mm
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D440004W
40 inch / 1016mm
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