Motor Question

[Jay Houghton]

I have a Meber 600 which is a 24" Italian bandsaw. It's got a 2.2kw 3ph motor on it that runs the machine just fine. I've resawed 12" oak and maple with no problems. I'm contemplating a single phase motor but my question is about how small this motor is for being almost 3hp. You can see from the two pictures that the Baldor, also 3hp, is way bigger than the OEM motor. How can that tiny motor on the saw be 3hp? There's no shortage of power, but it seems odd. I should be able to fit a single phase motor the size of the Baldor in there and maybe it'll run even better!

Jay
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[Matt Day]

I have basically the same saw - a Centauro 600. Why would you change the motor in the first place?

[Bruce King]

The 3 phase produces more power per size than a single phase as you already see.
It also costs less to run until you factor in repairs. Don’t change it out unless you want to sell and the buyer wants the single phase one.

[Mike Henderson]

If you're going to a single phase shop, get a VFD to drive the original motor. That should be less expensive than a new single phase motor.

Mike

[Bill Dufour]

It looks like the Baldor is unvented and has no cooling fan of any kind. It also has to make room for a centrifugal switch and starting coils inside. For a big bandsaw I think 3 phase is a good idea just for the slow start and dynamic braking. 3HP is the breakpoint for VFD pricing. Above 3hp they jump way up in price.
Bil lD

[Jay Houghton]

That Baldor is a TEFC 3ph motor so there's no start windings.
Jay

[John Lanciani]

That Baldor is a TEFC 3ph motor so there's no start windings.
Jay

That Baldor is not TEFC, the vents are clearly visible on the shaft end of the motor. It’s open drip-proof.

[Bill Dufour]

I see the vents now. I thought the Baldor is single phase? A vented motor is a poor idea in a woodshop
Bill D

[David Kumm]

Machinery companies tend to fill small frame motors with lots of wire to boost HP. The lighter weight allows for a little less need for frame strength. The italian motors in particular are examples. The downside is they can run hotter , especially at 60hz and replacing the frame size with the same hp on the larger motors is difficult. If you swap the motor you will also need to swap or rebore the pulley, change the belt, and possible change the starter. Much cheaper to add a vfd for 200-300, and use the starter to fire up the vfd. Dave

[Brian Runau]

That Baldor is a TEFC 3ph motor so there's no start windings.
Jay


Baldor is ODP. Motor manufacturers went to ODP models VS TEFC to get around the energy efficiency standards that went up a couple years back. larger HP TEFC became regulated, ODP weren't included in the new standard and that left a loop hole for them to exploit. Brian