plastic end of spiral balance

Thanks for posting. I think you may be mistaken. Spiral balances don't often have this shoe. Unfortunately, the shoe is not available by itself so you would have to replace the whole balance if it's broken. Check out our Series 860 and see if this is a match.

Ahh, I see. This is neither a spiral balance nor a block-and-tackle balance. It is actually a channel balance. See our Series 775 for a better match. The "casing" is the channel, and is part of the balance. It is not meant to become separate from the spring. To remove it, unscrew it and pull the top down first, then twist the shoe out. I think the reason you can't remove it is because the shoe is still locking it in.

Great! We actually have a guide on how to install this balance. Check it out below.

Is the new shoe the same size as the old shoe? The Series 775 has two different sized shoes, and if you ordered one that is bigger than the old version that's likely why it can't fit.

That doesn't seem to be the case. According to your order history, you purchased a balance with the 1-1/4" shoe. Of the two sizes we have for the Series 775 that is the larger. Are you sure you didn't need the 1" instead?

We can custom make a 35B balance with a 1" shoe for you, if that's what you need. But I would need you to confirm that you originally had a 1" shoe before we go any further.

For future reference, if you need your balance to be made a certain way but don't see the option on our site, let us know! We may be able to custom make it, or even add the option online.

Color doesn't really matter for this balance shoe. Size is the most important thing to consider. Are you sure you don't have any shoes on hand that you can measure? Perhaps in an identical window elsewhere in the house? I'm hesitant to custom make a balance for you until we know for sure what you have.

If you're confident that that's what you need, let me know and I can get the ball rolling on the custom order.