You mentioned having a 2 HP 120/240VAC gearhead motor that's reduced by
23.1, so that should give you about 75 RPM final output (for a motor speed
of about 1725 rpm), I think.
If that gearbox is rated for an input of 2 HP, it's not going to wear out
anytime soon from powering your bandsaw.
For 12" wheels, (37.68" circumference) you'd get about 235 FPM blade speed
at a 1:1 ratio. Some reasonable pulley sizes should get you to your ideal
lower speed for metal. Getting up to the speed range mentioned for wood will
be a little more difficult.
Fractional HP motors are used to drive 10" bandsaw wheels through worm
reduction, so 2 HP should provide you with plenty of power.
WB
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"Roy" wrote in message
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The DC motor I have is rated on the data plate at 5100 rpm, and to
bring that down to a useable rpm with a gear reducer and jack shaft is
really not a feasible idea once I started to think about it. I would
have to get that motor down around 1400 to 1700 rpm for most gear
reducers, so I am already at a pretty low rate of speed and power with
the DC motor I have. A 1745 or 1800 rpm ( or even lower rpm) motor
puts me in that range already at a much higher torque , and reducing
that down or through a gear reducer seems more feasible, espeically if
coupled to a VFD.
I really do not know, but I don;t want to do and undo something as I
would rather do it right to start if its possible. I am figuring
(actually guessing) I should be able to use a 2 hp VFD, with a gear
reducer of 40 or 60:1 and a jackshaft to get the speeds and torque
that would be satisfactory, but even my guessing is just an uneducated
shot in the dark! I just do not have any faith in a used treadmill
motor on something such as this.
Making a worm gear setup is beyond my capabilites. I guess I would be
happy to just use it for metal as thats my main concern, as I am not
into doing any real woodworking per se, and I imagine it would cut
wood to some degree with a wood cutting type blade.
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