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Forum topic by irish620 posted 04-16-2012 09:53 PM 1208 views 0 times favorited 10 replies Add to Favorites Watch
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irish620

37 posts in 1772 days


04-16-2012 09:53 PM

Jocks,

I need a grinder and the lure of the old tools is growing in me. The grinder in the picture is available for $100 near my house. I don’t know much about grinders and certainly know anything about 60 year old grinders. Its made by
US electrical Co, which is still in business and is 110v. I think it has 6’’ wheels.
Now, before i go look at it, i have a few questions for you:

1. will i have problems finding new wheels for old grinders or are the arbors still the same as new ones ?
2. Do you think i will have to repair the wiring and bearings just because of the age ?
3. Do the motors last forever on these old grinders ? I don’t want to learn the windings are shot and then throw it out
4. Can you use buffing wheels with this type of grinder or are the speeds to slow ?

Thanks guys, any input is helpful !


10 replies so far

View Loren's profile

Loren

8302 posts in 3111 days


#1 posted 04-17-2012 12:09 AM

1. no problems.
2. no.
3. motors can last a very long time.
4. you can use buffing wheels with any grinder.

Run it and see if it sounds could. It should sound smooth and quiet. Most
of the sound will be from the wheels moving the air.

View irish620's profile

irish620

37 posts in 1772 days


#2 posted 04-17-2012 12:16 AM

Loren ,

Your advise is always respected.

Would you pay $100 if all was well ? Based on the picture

View waho6o9's profile

waho6o9

7172 posts in 2040 days


#3 posted 04-17-2012 12:24 AM

I like 1725 rpm’s. Some say too fast is not good. Any thoughts on this?

View Loren's profile

Loren

8302 posts in 3111 days


#4 posted 04-17-2012 02:19 AM

Not just for the grinder because it’s a metal shop grinder
and more than you really need, but the stand alone is
worth something and makes it a good deal. A grinder
stand alone is worth $40-$100 on the used market.

Slower is better than faster for sharpening tools. For
grinding welds might as well grind fast. 1725 is fine –
all you need to do is use a friable (white) wheel and
do put some water in the cup to cool your tools in.

View Don W's profile

Don W

17962 posts in 2031 days


#5 posted 04-17-2012 11:44 AM

I agree with Loren. I wish my grinder was a 1725 rpm. If your sharpening tools, make sure you take Loren’s advice and get the friable wheel.

I’d have to be in front of it to tell if I’d pay $100, but if its in good working order, it will server you better than the $100 HD purchase.

-- Master hand plane hoarder. - http://timetestedtools.net

View dbray45's profile

dbray45

3186 posts in 2240 days


#6 posted 04-17-2012 11:52 AM

To be honest, this grinder is for a machine shop. The motor will be too fast to sharpen chisels and plane blades – you will burn the steel and loose hardness. Had one, gave it away and bought a variable speed 8” Delta and always use it on the slowest speed unless I am buffing something or grinding a lawnmower blade.

New Delta is like $30-40.

-- David in Damascus, MD

View Don W's profile

Don W

17962 posts in 2031 days


#7 posted 04-17-2012 11:59 AM

David, what Delta do you have and where can you get one for $30-$40? I’ve been looking for a slower speed grinder.

-- Master hand plane hoarder. - http://timetestedtools.net

View dbray45's profile

dbray45

3186 posts in 2240 days


#8 posted 04-17-2012 12:20 PM

Lowes – hang on – let me find it

Crap – its gone up in price

http://www.tools-plus.com/delta-gr275.html?utm_medium=feed&utm_source=froogle&utm_term=DELGR275

I bought it at Lowes but they don’t show it on their web page.

-- David in Damascus, MD

View irish620's profile

irish620

37 posts in 1772 days


#9 posted 04-17-2012 01:17 PM

Since I don’t know much about grinders, I wasn’t sure if it could be a multi purpose grinder.
I am doing a restore on a 47’ unisaw and thought a grinder with a wire wheel and buffer would be great.
But I would like to sharpen tools as well, and use it as a normal shop tool when the restore is over. I guess there is no all in one buffer/grinder that works well for all applications ?

View dbray45's profile

dbray45

3186 posts in 2240 days


#10 posted 04-17-2012 02:30 PM

There are usually two wheels on a grinder. They make buffing wheels, different grits of stones, wire wheels, etc… for these devices. If you are doing a top, get a portable grinder with a wire wheel, if you are doing small and woodworking tools, get a variable speed – slower the better. As a rule of thumb if your hands are near that device keep you fingers safe, the faster the stone, the more skin it takes off and the farther it throws that little blade across the room – through whatever is in its way.

I have had a stone disintegrate at full speed – grinders scare me far more than a table saw or band saw

-- David in Damascus, MD

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