Things to do before you buy a new motor.
1) Make sure the wire powering the motor is at least 12AWG, 10 is
2) Convert present motor to 240V service.
2) Replace the blade with a quality blade designed for the task.
3) Check saw bearings. Sealed ball bearings are usually greased for
life and should be no problem; however, journal bearings should
probably be lubed if they have oil cups. If not get some oil into them
by whatever means possible.
If the above doesn't solve you problem, get out your piggy bank.
The recent ramp up in copper prices will be reflected in motor prices.
You can use either 1725 or 3450, it's simply a sheave matching
operation to get desired blade speed.
Stick with a 48/56 frame, that will give you a 5/8 shaft and will fit
existing mounting feet but may extend aft more than the present motor.
Buy a TEFC, cap start, cap run motor with built in overload which will
work fine for a woodworking tool since starting torque is usually low.
Couple of years ago, a 2HP unit as described above was about $300.
Today, $400 wouldn't surprise me.
Grainger will be a good source.
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