Spring type. Torsion springs cost more but deliver smoother operation and longer lifespan. Extension springs cost less but require more frequent replacement. Local labor rates. Cities with a higher ...

Q: I’m going to replace a broken spring for our garage door. The home-store salesman said I needed to replace both springs even though only one is broken. Is this true? A: A majority of homes use ...

Swatch Group has patented a method for measuring the torque of a balance spring in a timepiece oscillator. The method involves using a main tool with a mock arbor and a holding tool to grip the outer ...