Coil snapped after 20 years. : SWISCO.com

Quick Learner from Hummelstown, PA

Sep 8, 2026 2:32 pm

I'm thinking it's the s190 but I might be wrong, there are no markings on these pieces. I would like your opinion on this please. Thank you for your support.

4 user uploaded images

3 Replies

Quick Learner from Hummelstown, PA

Sep 10, 2026 2:47 pm

I'm curious which balance stamp this belongs to. I don't see any identifiers on the coil to know which balance stamp to purchase.

Casey from SWISCO

Sep 15, 2026 1:52 pm

Hello,

Your pivot shoe resembles the 15-180 shown below, which uses the 1/2" thick S190 coil springs. If there are no stamps on the original coils, you'll need to weigh your sash, divided by the number of coils used on both sides, to determine the correct strength options. Thanks for posting!

Alternate image for 15-180