Harbor Freight again

Larry, I'm sure to click on that link to take a peek. On your worry though, I have been running an open frame DC for a couple years and have so far had one pop and one bad pop. I am grinding a lot more simple high carbon now and I doubt the ol'girl will be with me much longer. For casual or periodic knife making - for the buck its a great budget. (I have not looked at your motor yet so I do not speak of it specifically).

EDIT: I looked. Not bad for the buck. Figure it high on the spec end. Count on about 1 1/2 horse. If that's good enough for the equpment 70 bucks new is not bad - my opinion - but figure it actually a little lower in horses than pictured. I might be wrong.

RL
 
I thought using compressor motors for something like a grinder was a no-no because they aren't intended to run continually. FWIW Harbor Freight has a 1HP TEFC "farm duty" motor online for $90, I think. May be a bit underpowered, but it's sealed up and is intended for machine/wood shop use.
 
T Blade said:
Just checked my e-mail. HF sent me this. http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=30189 Not too bad if you need a motor and you're on a budget. Though this is an open ended motor, it seems that people using this type have not reported burned up motors due to crap getting into the windings.

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It's way too fast for a grinder motor, IMO. If you can't go variable speed, at least get a TEFC motor that runs at 1750 RPM.
 
Chiro75 said:
I thought using compressor motors for something like a grinder was a no-no because they aren't intended to run continually. FWIW Harbor Freight has a 1HP TEFC "farm duty" motor online for $90, I think. May be a bit underpowered, but it's sealed up and is intended for machine/wood shop use.
Click to expand...
Steve,
"Compressor motor" usually means that it has high starting and breakdown torque for hard starting applications (ie: compressors) and does not in itself signify if the motor is intended for continuous duty or not.
Regards,
Greg
 
rlinger said:
Larry, I'm sure to click on that link to take a peek. On your worry though, I have been running an open frame DC for a couple years and have so far had one pop and one bad pop. I am grinding a lot more simple high carbon now and I doubt the ol'girl will be with me much longer. For casual or periodic knife making - for the buck its a great budget. (I have not looked at your motor yet so I do not speak of it specifically).

EDIT: I looked. Not bad for the buck. Figure it high on the spec end. Count on about 1 1/2 horse. If that's good enough for the equpment 70 bucks new is not bad - my opinion - but figure it actually a little lower in horses than pictured. I might be wrong.

RL
Click to expand...
Roger, as you said "For casual or periodic knife making - for the buck its a great budget." As that is the type of grinding I perform, it's OK. I have a DC treadmill motor on my grinder (1 1/2HP maybe), and it works fine.

Mike Hull said:
It's way too fast for a grinder motor, IMO. If you can't go variable speed, at least get a TEFC motor that runs at 1750 RPM.
Click to expand...
Mike, those are my feeling exactly. The treadmill motor I have on my grinder, operates at 4000RPM, so I am using a 2 5/8" pulley on the motor and a 5 1/4" pulley on the grinder shaft, which should cut the RPM in half, and give you more torque at the platen/wheel.

AT this time, I am not actually looking for an electric motor, I just put this up on the forum incase other newbies want to get into a grinder for less money. As some people could use an inexpensive motor, sell a couple of knives, save that money and upgrade to a more serious motor.


Larry T

Member of NECKA & NCCA
 
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