Alpha HW110S Table Saw: Resolving Motor Noise or Vibration at Shutdown

If you’re noticing a noise or excessive motor vibration mainly at shutdown please refer to the information below on how to make adjustments to address it. Some noise and vibration at shutdown is usually considered normal and is caused by the centrifugal switch re-engaging as the motor slows down. 

However, in many cases, noise and vibration at shutdown can be significantly reduced or eliminated by increasing the motor drive belt tension.

Why the Noise Happens:

The motor’s centrifugal switch activates twice:

• Startup: Disengages (producing a faint “click” or “pop”)

• Shutdown: Re-engages while the motor is still rotating, which can produce a louder, scraping-like sound—especially if the belt is loose and vibration occurs

When to Check Belt Tension:

You should inspect and tension the belt if you experience:

• Clunk noise and vibration only during shutdown

• Belt squealing or screeching at startup

• Motor bogging down during cuts

• General loss of cutting power

How to Tension the Belt – HW110S Table Saw

Please refer to our step by step solution article for adjusting the belt tension:

Alpha HW110S Table Saw: Belt Information and Tensioning Instructions

What If the Noise Persists?

If the noise:

• Only occurs at shutdown → This is considered normal, especially on higher-horsepower motors like the HW110S.

• Occurs during operation or gets louder while running → This could indicate a bearing issue or other internal motor problem. Please contact our support team for further diagnostics.

Warranty & Support

Your Alpha HW110S 4HP table saw is backed by a 2-year manufacturer’s warranty from the date of purchase covering defects in materials and workmanship. If you ever experience unusual noise, performance issues, or have questions about maintenance, we’re here to help.