motor recommendation for surface grinder???

Joined
Dec 3, 1999
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Well, I've had that thing sitting out there for awhile, but with two shows on consecutive week-ends, I haven't had time to mess with it. I went out and tore the three phase Baldor off of it today.

I'm curious to hear what you guys would recommend as a replacement. I got a quote for a new in the box Baldor, all the same except single phase (56 frame, 3450 rpm, 1/2 hp, TEFC) for $120.

It seems like 1/2 would be enough for a s. grinder, but many out there are at least 3/4 if not 1 to 1-1/2 hp.

Any help would be appreciated.

I know one thing for sure, even though the Baldor that was on it is only 2 months old and used 3 times, NOBODY wants it. Maybe I'll keep if for a spare anchor
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Thanks,
Nick
 
Joined
Dec 2, 1999
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Nick, What rpm is the original motor? I would think you should stay with the same rpm but kick the hp up at least 1/2 hp. I have a baldor 1 horse 1750 rpm but dont know if it will bolt up. Bruce
 
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Sep 23, 1999
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I think you can buy a phase converter for a couple hundred dollars. That way you could keep the grinder all original.

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Take care!! Michael
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Nov 25, 2000
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Nick,you might try selling your 3 phase to local machine shops,many of them are on 3 phase.Bruce,if your motor is 56 frame and shaft size is the same as Nicks,probably 5/8" ,it will work.

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MIKE
 
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Jun 15, 2000
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537
Hi Nick I cured my S.G. motor woes on my Brown&Sharp 6x18 with a 2hp.3600 rpm Marathon from Northern Hydraulics for around 140.00. I use it to taper with a belt conversion and put the rock back on for folder parts. Been two years now without a hassle. You might try www.northernhydraulics.com if that dont work e-mail me and I will find you a 800 number. Good luck GenO

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GenO Denning
CavemanEngineering.com
 
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Dec 3, 1999
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Thanks for all the replies guys
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I left some info out of that first post that I should have covered.

I HAVE looked into phase converters, but at about $160-200, it isn't a great idea. Because the motor is only 1/2 hp now, run it through a converter and it will be about 3/10 hp (not much left over). For that price I can bolt on a new motor and have lots of power.
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I think I worded that first post wrong, because what I was trying to say is that the Baldor I got a quote for is EXACTLY the same motor, but it's single phase.

The frame is 56, but it's just mounted on a side plate and drives the machine via pulley/belt.

GenO, thanks for the tip. I like the idea of making a belt conversion for tapering tangs and cleaning up damascus (when I get making it figured out). But throwing the rock back on for folder parts. I think for the rock the 1/2 hp is enough, but for a belt conversion I think the 1-2 hp would be nice.

Thanks for the advice guys.

GenO, do you have a photo of your belt conversion? I am trying to figure out the best way to rig this up so that it's easy to go from stone to belt and back.

Thank you
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Nick

 
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Jun 15, 2000
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Hey Nick I just found out the web page is down for a couple of days, but I think there is a pic of it in the shop tour. I have a show on me at the moment but after the show I will get some detailed pics up of the grinder conversion. Oh Enco has 1800 rpm c-face motors on sale also, they offer a 1 1/2 hp for 119.95 but I think that is slower than the OEM motors check them out at www.use-enco.com. Take care GenO

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GenO Denning
CavemanEngineering.com
 
Joined
Dec 3, 1999
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GenO and Kelly-

Thank you very much!
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I really appreciate that. I think that's what I'm going to do, now just finding the time to do it...

I've been so busy with work that I haven't even got the new motor yet.

No wonder I'm not ready for the Eugene show yet
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Thanks guys, I really appreciate you doing that for me!
Nick
 
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