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Electric motor question

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ADSR

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Hi guys. After 200 small thin wall cuts on my "industrial" bandsaw, the motor started blowing smoke out of it and the windings look burnt up.

The motor is a 1/2hp 17XX RPM but i'm not sure which way it spins. Can they spin either direction depending on how they are wired? I'm keeping an eye out on C/L for an American made motor and want it to spin the right way.

BTW, the saw was garbage to set up to cut square. I had to grind the vice casting to clear the bearing that guides the blade and other things as well. Wouldn't buy this saw again.

King canada and grizzly sell the saw....

http://www.kingcanada.com/Products.htm?CD=169&ID=12033

http://www.grizzly.com/products/5-x-6-Metal-Cutting-Bandsaw-w-Swivel-Head/G9742
 

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zkling

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The majority of universal motors can be reversed, by switching the start winding leads. Just watch out for older RI motors that were designed to run one direction only, but those typically have dual shafts to get reverse out of them. I'd look for a ball bearing motor. You might want to put a thermal overload switch inline if the new motor doesn't have one. Those stock motors are notorious for giving up the smoke. My mid 80's Taiwan horizontal has a Baldor replacement motor on it; probably the most expensive part of the saw :lol:
 
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Davefr

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Most of these 1/2HP 1750 RPM induction motors can be jumpered to turn CW or CCW. Many of them can also be jumpered to run off 120 or 240VAC.

You need to look closely at the nameplate.

For that type of tool I'd feel more comfortable going TEFC. (totally enclosed, fan cooled)
 
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454ragtop

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Davefr said:
Most of these 1/2HP 1750 RPM induction motors can be jumpered to turn CW or CCW. Many of them can also be jumpered to run off 120 or 240VAC.

You need to look closely at the nameplate.

For that type of tool I'd feel more comfortable going TEFC. (totally enclosed, fan cooled)
Click to expand...

Most any 1/2 HP motor of the correct RPM should do, IMHO a TEFC motor is overkill, pretty hard to get swarf in that motor. Just grab a motor, any good quality one is likely to outlast the saw.
Jim
 
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rlitman

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TEFC has the advantage that the motor will not **** debris through its windings.
In a shop environment, it should last darn near forever unlike an ODP motor, so long as it isn't overloaded.

As for which to buy, TEFC is WAY more expensive. An ODP motor on that saw probably isn't likely to get swarf from cutting into it, but if it's in the stream of your angle grinder one day ...
 
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lilredex

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You can tell which direction that motor turned by looking at the teeth on the blade.........probably moves toward the motor.

Agree, TEFC would be nice but not an absolute necessity. Find a KIJIJI motor 120V/1725 RPM. You might even find a free cast off furnace fan at the curb with a 1/2 HP motor. Most of those motors are reversible, look for the start winding to be accessible and not buried internally. PAL had 1 HP (1725 RPM) open frame (appliance) motors for $15 a while back........guess you missed those. Those import motors are weaklings and junk!!

Too bad you are not closer, I could come up with something that would work.

These: http://www.princessauto.com/en/detail/1-hp-treadmill-motor/A-p8300881e

The matching bracket was $1.
 
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A

ADSR

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lilredex said:
You can tell which direction that motor turned by looking at the teeth on the blade.........probably moves toward the motor.

Agree, TEFC would be nice but not an absolute necessity. Find a KIJIJI motor 120V/1725 RPM. You might even find a free cast off furnace fan at the curb with a 1/2 HP motor. Most of those motors are reversible, look for the start winding to be accessible and not buried internally. PAL had 1 HP (1725 RPM) open frame (appliance) motors for $15 a while back........guess you missed those. Those import motors are weaklings and junk!!

Too bad you are not closer, I could come up with something that would work.

These: http://www.princessauto.com/en/detail/1-hp-treadmill-motor/A-p8300881e

The matching bracket was $1.
Click to expand...

Hmm... i never saw those. I have to keep my eye out for this stuff. I'm uploading the video of the smoke monster coming out of the motor today. :lol_hitti
 
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Jswain

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I'd be looking for an old beat up tablesaw that someone is throwing away(can find one a few times a week around here anyways) or selling for very cheap and making that motor work on it. No sense spending an extra $200 on a saw that you already don't love lol
 
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Jere

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When my 4x6 bs motor gave up the ghost after (30+ years), I bought a belt driven Campbell hausfeld air compressor with a leaky tank from craigslist. It was like 40 bucks or so but had the same shaft size, HP, and rpm but it is USA made. So you might keep an eye out for the same. You could stick a higher HP motor on there if it has the same rpm. That way the machine would have a little more grunt.

There is a huge following for 4x6 saws in case you didn't know. Any issue has a fix at least that I have come across. Your is very similar just with a cool adjusting base. Don't give up on that thing yet!
 
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ADSR

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Jere said:
Looks good, make sure it runs and the bearings are good. Bearings aren't hard to change if you want to get into that. If not check that the shaft doesn't move up and down or squeal like crazy
Click to expand...

Great! I have a bunch to cut, haha!:beer:
 
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lilredex

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454ragtop

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marinusdees said:
I am staggered by the amount of (mis)information posted on this site. So many experts, so little space.
Click to expand...

Care to enlighten the rest of us to this so called misinformation? Might consider posting some useful information instead of throwing out useless innuendo.
Jim
 
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ADSR

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lilredex said:
Go get it. That dual shaft will allow it to drive in either direction, just by turning it 180*. It is from the fifties/sixties, I have the same one in a 3/4 HP model.
Click to expand...

Bought it last night. The shafts had no play in it at all. I fired it up and it ran like clockwork. It's silent compared to the china junk i pulled off.

Brought it home and blew it out. Man, it was full of sawdust:willy_nil Took me 10 min to get it clean. took a wire brush to it and shot some paint at it.

Pictures tomorrow. I'm happy tho. 15 bucks and she runs awesome!
 
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ADSR

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BTW, are there any sites/forums for 4x6 bandsaw mods? I did a search here but nothing came up.
 
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ADSR

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454ragtop said:
https://groups.yahoo.com/neo/groups/4x6bandsaw/info
Click to expand...

thanks. That site is tough to nav through:headscrat

Couple shots of the new motor. She works awesome!

20150214_140359_zpsf0tnnk63.jpg


20150214_140422_zpsupjz4zkc.jpg
 
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Jere

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LORDDiESEL said:
thanks. That site is tough to nav through:headscrat

Couple shots of the new motor. She works awesome!

20150214_140359_zpsf0tnnk63.jpg


20150214_140422_zpsupjz4zkc.jpg
Click to expand...


Looks good, if you are looking for mods "4x6 bandsaw mods" and google video or image searches will pull up the most varied results from all fabrication/shop message boards. Find a few good pictures and follow them to the site. These import saws have been around since the 70s so there is loads of stuff that can be done to them. It looks like yours came with some cool stuff to start with and swapping the motor is a good one.
 
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Davefr

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LORDDiESEL said:
thanks. That site is tough to nav through:headscrat

Couple shots of the new motor. She works awesome!
Click to expand...

Looks great!! Congrats on the inexpensive replacement.

The first mod I'd do is cover up that unused motor shaft. (maybe with a scrap piece of PVC/ABS pipe).

It's never a good idea to have exposed rotating motor shafts but the motor looks like it's mostly out of harms way.
 
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A

ADSR

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Davefr said:
Looks great!! Congrats on the inexpensive replacement.

The first mod I'd do is cover up that unused motor shaft. (maybe with a scrap piece of PVC/ABS pipe).

It's never a good idea to have exposed rotating motor shafts but the motor looks like it's mostly out of harms way.
Click to expand...

That's a good idea. I'll bang a piece of pipe on there and cap it.
 
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