spiral balance cycles before failure
A professional from Kentucky says:
October 21, 2010
What is the number of cycles a balance is intended to handle before failure.
Paul Sr. from SWISCO responded:
October 25, 2010
The life expectancy of the S400 spiral balance is 5 to 10 years under normal use. Several factors determine the life expectancy such as having the correct strength balance for the sash weight, usage, and window sash friction.