SWISCO - The Replacement Hardware Authority

30" Series 770 Balance

Product Code: S770-30

Product Description
Series 770 replacement 30" block and tackle channel balance system for a tilt window. Sold individually.
Stamp Option Sash Weight Range
B 13 to 19 lbs
C 19 to 24 lbs
D 24 to 29 lbs
E 29 to 33 lbs
*This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
Good Idea!
Balances are sold individually, however, it is a good idea to replace both window balances at the same time. Pairing a new balance with an old one would cause the new balance to wear out faster.
Helpful Tip!
The stamp option represents the strength of the channel balance. Locate the stamp on your channel balance. If your stamp does not match any of the stamp options available or you are unsure of which stamp option you should choose: ask our experts for help.
Customer Questions & Comments
Discussion # Of Replies Last Post Date
I could use help identifying a replacement for this window balance and shoeThis discussion includes image(s). 2 Jul 25, 2016
Unique balance with heavy duty hook 2 Jul 6, 2016
Millard Double Hung Window PartsThis discussion includes image(s). 2 Jun 29, 2016
Channel BalanceThis discussion includes image(s). 2 May 17, 2016
Help id window balanceThis discussion includes image(s). 4 Dec 4, 2015
Color of S770-30? 2 Oct 26, 2015
BSI balance replacement partsThis discussion includes image(s). 4 Jul 17, 2015
Broken balance: Unique Balance 29-D-40 for a Bonneville tilt double hung windowThis discussion includes image(s). 6 Jun 29, 2015
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