Looking at the stamp as 15-1 it could be 1510 option but looking at it as b 15 it could be 1520.
Weigh the actual window sash.
1510 will carry a window sash load of 4 through 6 pounds,
a 1520 will carry a weigh range of 6 through 10 pounds.
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.
Stamp Options
Casey from SWISCO
Apr 23, 2009 8:12 am
4 Replies
Handy Person from 91354, CA
Apr 23, 2009 11:10 am
I have a SWISCO balance Series 380 with a stamp b 15-1. What option do I need?
Quick Learner
Jun 5, 2009 5:34 pm
I have a balance spring with a stamp of 1520y the y looks to be up side down. what do i need?
Casey from SWISCO
Jun 8, 2009 6:19 am
Most likely the 1520, to check remove the window sash and place it on a scale.
A 1520 will carry a window sash weight range of 6 through 10 pounds.
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.
A 1520 will carry a window sash weight range of 6 through 10 pounds.
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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