We've all come to rely on the accuracy of digital electric clocks--but many of us still have a mechanical clock or two around the house. It's a windup wall clock, a weight-driven cuckoo clock, or a travel alarm. Because it is mechanical rather than electrical, it is more subject to wear. That's where regular maintenance can make a real difference. See the Electric Clock Fix-It Guide for help in repairing an electric clock.

How Does It Work?

A clock is an instrument for measuring and displaying time. Mechanical clocks are driven by spur gears that are powered by either a falling weight or an unwinding spring that turns the hands at a precise rate. The main shaft then turns the hour, minute, and sometimes second hands around the clock face to indicate current time.

What Can Go Wrong?

Clocks can fall or be knocked over and damaged--sometimes beyond repair. However, most clock servicing is done because the mechanical clock isn't telling accurate time anymore. It's slowing down or has stopped. This is a preventable condition.