I recently purchased 3 Skil 6-1/2" Wormdrive saws for my carpentry business. I powered them up right out of the box without blades attached and they all sounded and felt fine. Running them with blades attached they felt and sounded as though they had bad bearings. My 10 year old HD77 runs smooth as silk. Any suggestions would be appreciated.
There are a few reasons that the saw would be short on power. First, using too long of an extension cord will limit the amount of current to the saw which will cause a loss of power. This will also create heat in the motor and can damage the field and armature.
A damage field or armature will cause a loss of power. There will usually be sparks from the motor, an electrical smell and even smoke.
If the gears are badly worn they can cause a loss of power. The gears might only be making enough contact with each other to spin the blade without a load but then slip under load.
I hope this will point you in the right direction!
Yes, all of the worm drives within at least the last 10 years use the same switch. It is part #2610321608 and is available from http://ereplacementparts.com.
