I am looking for a replacement window balance.
What I have looks close to your S770-28 except it is stamped "Unique 27-E-50" on the back of the channel.
The channel is 28 inches X 9/16" width X 1/2" depth.
Can you help cross reference this stamped identification with one of your products?
Thanks,
Greg
Tilt Window Balance

Quick Learner from Orlando, FL
Nov 30, 2010 1:20 pm
2 Replies

Paul from SWISCO
Dec 1, 2010 10:31 am


Feel free to post images if you are unsure of the balance series.
SWISCO 28" Series 770 with stamp option 28E will carry a window sash weight range of 28 through 32 pounds. To check if this will work, remove the window sash and place it on a scale.
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.
SWISCO 28" Series 770 with stamp option 28E will carry a window sash weight range of 28 through 32 pounds. To check if this will work, remove the window sash and place it on a scale.
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.
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