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Four Wheel Grinder

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Project by Kelly posted 02-24-2020 11:00 PM 851 views 1 time favorited 8 comments Add to Favorites Watch

I picked up a home made, four wheel grinder in response to a craigslist ad with the idea of being able to use four different stone wheels, for maximum versatility of use.

The grinder came with a 220 VAC, 1720 RPM motor, and no stand.

I built a simple stand with a horizontal storage area on top. The whole thing sits atop the, in my shop, usual casters.

I ran a 220 circuit, installed some wheels, fired it up and all was go.

Looking at it, one could build this from 2x’s, six pillow blocks, two shafts, four pulleys, a coupler [to tie the motor to the upper shaft], and adjustable flanges [to hold the pulleys], however called.

Though this worked great, and gave me the ability to run four different grits, the speed was more than I wanted. To my good fortune, fate smiled on me and I was able to purchase a 3/4 hp sewing machine motor and controller at a yard sale (amazing, since we are not the place to be for yard sale opportunities).

The 3/4 horse sewing machine motor is variable speed (0- 2,400 RPM) and reverses at the flick of a switch.

I swapped the 220 VAC motor for the variable speed one and fired it up. I love the ability to control the speed by simply turning a knob. Being able to slow the speed to, say, 300 or 400 RPM, allows me to avoid taking too much metal off something, or overheating the metal.

I added two CBN wheels (ouch) for lathe knife sharpening and profiling. This made the slow speed capability even more impressive.

In the end, the variable speed motor and CBN wheels make this home spun unit the best sharpening station I’ve seen. It, certainly, would compete with the twelve hundred dollar Tradesman. At least until you got into things where even a little run out cannot be tolerated. Of course, you’re getting into an even more impressive end price.

I haven’t installed the switch yet, but I added LED strips under the upper hood, making it easy to see what you’re doing.

The unit came with iron bars on the end, like the one seen on the right, but I’ve cut one off and will be adding some heavy duty aluminum angle stock to support the sharpening jigs.





8 comments so far

View recycle1943's profile

recycle1943

3882 posts in 2296 days


#1 posted 02-24-2020 11:27 PM

What an apparatus – nice find

-- Dick, Malvern Ohio - my biggest fear is that when I die, my wife sells my toys for what I told her I paid for them

View swirt's profile

swirt

4911 posts in 3646 days


#2 posted 02-25-2020 02:40 AM

Good finds and clever repurposing.

-- Galootish log blog, http://www.timberframe-tools.com

View mafe's profile

mafe

12496 posts in 3763 days


#3 posted 02-25-2020 08:29 AM

Super cool, or should I say sharp setup.
Nothing like sharp tools.
Best thoughts,
Mads

-- MAD F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View ralbuck's profile

ralbuck

6457 posts in 2940 days


#4 posted 02-25-2020 08:57 PM

Shop equipment is just a place to start from to make it usable for our purposes.
Great job.
Good score and nice equipment rescue too.

-- Wood rescue is good for the environment and me! just rjR

View Kelly's profile

Kelly

2795 posts in 3618 days


#5 posted 02-25-2020 09:09 PM

I should add:

(1) I have drawers “started” that will be home to all sorts of polishing supplies (diatomaceous earth, rotten stone, pumice, baking soda, plastic polish, polishing pads and hook-and-loop heads, etc.).

(2) I have an old household cyclone vac, which ticked me off (the head wouldn’t stay up where it belonged, though it, otherwise worked well) and it is being dedicated to a PVC pipe and valve system to grab the not insignificant amount of iron that rolls off blades.

It will be perfect for collecting dust and grit off the four “stones.”

View bushmaster's profile

bushmaster

3868 posts in 2957 days


#6 posted 02-25-2020 09:35 PM

Thats one impressivw unit

-- Brian - Hazelton, British Columbia

View LittleBlackDuck's profile

LittleBlackDuck

3794 posts in 1495 days


#7 posted 02-25-2020 10:19 PM

Very impressed K’... As I have a Tormek, not so much for sharpening/grinding, but more so for buffing… with that magical variable speed. Would work wonders with a couple of 8” buffs mounted (more specifically, the Beall buffing system).

-- If your first cut is too short... Take the second cut from the longer end... LBD

View Kelly's profile

Kelly

2795 posts in 3618 days


#8 posted 02-26-2020 12:35 AM

Another craigslist score, and why I don’t need buffers on this, is the $100.00 AirHandler buff system. It has a squirrel cage and filters and does a great job of grabbing the not insignificant amount of garbage that comes off the wheels. On the latter, I am always amazed at how loaded the 12”x25” filters get.

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