Coil

Question

I am having trouble figuring out what coil part I need the only thing I see Is the letter c on the coil. The coil also snapped this is why it's not working anymore. I need to find the coil the rest of it appears to be fine

Jasmine · Accepted Answer

Hey there,

Thanks for posting! Your pivot shoe appears to be an older discontinued version our 15-177. To determine if this replacement will work for you, you'll need to remove your existing shoe from the window and compare the dimensions to those shown below.

Alternate image for 15-177

These pivot shoes are compatible with the 1/2" thick Series 152 coil balance springs. To determine the correct spring strength for a particular sash, since there are no stamps/markings, you'll need to obtain the exact weight of your sash. Once you have the sash weight, you'll divide it by the total number of coils in the window.

To install the coil to the shoe, you will need to slightly unroll the coil so that you can fit the coil into the slot at the stop of the shoe. Then you'll need to secure the coil to the shoe using the 33-072 .

You may also need the 15-143 coil bushing, 15-144 coil bushing cap, and the 15-145 coil support barrel.