Help measuring diameter

Quick Learner from Cleveland Ohio

Aug 2, 2017 7:38 pm

Can u tell me which part of the spiral balance (pink arrow or blue arrow) I measure for the diameter so that I can order the proper replacement
parts. The metal ridged tube is 3/8 and the white plastic cover is 5/8. These are Alcoa windows from around 1994. Also for the length, do I measure the ridged metal or the plastic tube cover. Thank you!

4 Replies

Tom from SWISCO

Aug 4, 2017 1:39 pm

You want to measure the outer white tube for both diameter and length, indicated by the pink arrow. If yours is 5/8", then I would recommend our Series 600 spiral balance. This is assuming this is for a tilt window.

Quick Learner from Cleveland Ohio

Aug 4, 2017 2:53 pm

Thank you for the reply. Yes. It is for a tilt window. One more quick question, if the length of the whte tube measures 29.5 is it best to order a 30 inch or 29 inch.

Tom from SWISCO

Aug 8, 2017 11:44 am

I would bump it up to 30". Manufacturers used to make spiral balances on the 1/2", but those sizes have been phased out over the years. We find going up to the next inch is a safe bet.