I have a Rigid band saw with the 3/4 hp motor and am considering swapping out the motor for one off my old table saw that is 2hp. The mounting brackets are the same so there is no issue there but the 3/4hp motor is only rated for 1450 rpm while the 2hp is rated for 3600 rpm. I noticed that of course the pulleys on the Tablesaw were both the same diameter while the ones on the bandsaw have a larger one on one side. Will the larger pulley on the band saw reduce the rpms of the 2hp motor down? If not would running the bandsaw at higher rpms be adverse, I would imagine that there would be a lot more heat.
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Replies
You need to maintain the bandsaw speed close to original. Otherwise you risk launching the tires or other damage to yourself or the machine. The formula for the speed is:
SFPM = MOTOR_RPM X MOTOR_PULLEY_DIAM ÷ SAW_PULLEY_DIAM X WHEEL_DIAM X 3.1416 ÷ 12
If you're considering a motor swap to cure a bogging problem, I recommend you start with the band rather than the motor.
Pete
I agree with Pete. If you are thinking of swapping the motor because the saw is not cutting well, the problem is not likely the motor. If you use a motor strong enough to "power through" the problem, other parts of the saw assembly are going to give you problems. The structure of the saw was designed for 3/4 hp.
99%+ bandsaw problems are due to problems with the saw's "tuning" and the type of blade.
Rich
I agree with the above posts. It takes some crazy sized pulleys to correct the speed, and the faster motor dosent have the torque of a slower motor at the same HP rating. At least that is what I have been told.
But the simple fact is that 3/4 horse motor will cut through 6" of very hard wood if the saw is working properly.
Pardon my spelling,
Mike
Make sure that your next project is beyond your skill and requires tools you don't have. You won't regret it.
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