Tilt Window Balance

A quick learner from Orlando, FL says:
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?


Profile picture of Paul Sr.
Paul Sr. from SWISCO responded:
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.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)