Series 385 Channel Balances vs Series 380 Channel Balances

Question

Only different between these 2 parts is the bottom and it's a 3/32 different.  I think my part is the 385 series.  If I'm not sure, should I error on the smaller size and choose the 380 or error on the larger size and choose 385 ?  Lastly, the 16 inch balance, what is the normal weight support ?  I couldn't tell from the marking on the balance.

Paul · Accepted Answer

Take a look at the diagram of the two bottom balance shoes for the Series 380 and Series 385. The depth between the two is a little different. You will need to measure the depth of your bottom shoe and compare it to both pieces to determine which one is the better match. As for the stampings, your part should have a stamping or marking. If it does not, then you will need to remove your sash, weigh it on a scale, and refer to the chart on the store page.

Comparison of 15-004 and 15-005

Stamp Option Sash Weight Range

1510 4 to 6 lbs

1520 6 to 10 lbs

1530 10 to 12 lbs

1540 12 to 13 lbs

1550 13 to 17 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.