ilyakubus
off to a rocking start
Member since November 2014
Posts: 6
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Post by ilyakubus on Nov 23, 2014 23:02:37 GMT -5
Hey Guys, first of all I'd like to introduce myself, if you are part of any rock groups on Facebook you will know me by the same name.
I am also KubusRubus on Etsy and KubusRubus on deviantart.com
Here is my question/inquiry for suggestions.
At this point I have a 6in flat lap and a felt wheel as well as a leather one that I use for most grinding and polising.
I am thinking about getting a single 2.5x6in expandable rubber wheel and putting it on my 1725rpm 1/3hp motor, with no speed control.
What do you guys think about this idea? How would you go about the water supply? Would this even make sense with no speed control? (I can get a controller if necessary)
Any and all ideas are welcome.
Thanks a lot, Ilya
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Post by jakesrocks on Nov 23, 2014 23:23:09 GMT -5
Unless it's a fully enclosed motor, I wouldn't. Electricity and water combined tend to make the user light up like a Christmas tree.
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Post by Rockoonz on Nov 23, 2014 23:50:42 GMT -5
I agree with Don, I would only run a wet grinder or sander with a wet duty motor or a belt drive that would isolate the motor from the water. 1725 is the RPM you want for an expandable drum.
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,339
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Post by quartz on Nov 24, 2014 16:34:18 GMT -5
Personally, I don't have a problem using any motor for your project, but it would have to be well shielded from splash, on a grounded system, and preferably plugged into a single plug portable GFCI. My question is how to drive it on a motor shaft, set collars don't [in my opinion] provide enough driving power. I can picture a sleeve attached on the motor shaft, with a shoulder on the inside, the wheel against the shoulder, and some threads outboard of the wheel to tighten the wheel to the shoulder using a nut and washer. That brings up motor rotational direction, depending on which way it rotates [assuming non-changeable] the threads on the sleeve, and the nut, may have to be left-hand to keep from self loosening.
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ilyakubus
off to a rocking start
Member since November 2014
Posts: 6
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Post by ilyakubus on Nov 24, 2014 22:56:30 GMT -5
Thanks guys, I've actually done quite a lot of electrical work, a lot more than lapidary, so I know how to keep everything safe. I can shield the motor completely, as I have a long and thick mandrel and can put a rubber washer on the shaft, behind the shield. The circuit is 20amp GFCI protected. What is bothering me at this point (besides the point brought up about the mandrel not being able to drive the wheel) is a halfway decent water supply system, but I am guessing I really don't need anything more than a gravity fed system, I have a solenoid that could shut it down and a tiny valve from some plumbing or heating work.
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ilyakubus
off to a rocking start
Member since November 2014
Posts: 6
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Post by ilyakubus on Nov 24, 2014 23:01:33 GMT -5
Oh and my mandrel is basically how you described, quartz, except the thread is right hand, getting another one is not a problem.
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,339
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Post by quartz on Nov 24, 2014 23:30:25 GMT -5
If the motor turns counterclockwise, you need right hand threads on pinch nut, clockwise requires left hand thread. Just like each end of a bench grinder. If you build a gravity coolant system with a solenoid and valve shutoff, you will be way ahead of most, good idea. Reservoir can be as simple as a hanging bucket.
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ilyakubus
off to a rocking start
Member since November 2014
Posts: 6
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Post by ilyakubus on Nov 25, 2014 20:55:41 GMT -5
Excellent! Thank you very much! I feel a lot more confident about this little addition now. My motor does indeed turn counter-clockwise, but can be re-wired, which I would rather not do, as I prefer counter-clockwise...
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Post by Rockoonz on Nov 26, 2014 1:28:54 GMT -5
I use ice maker water tap kits and the Lowes yellow 1 gal paint buckets for my water supply buckets. The ice maker valves are needle valves so there,s a lot of fine adjustment to water flow.
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ilyakubus
off to a rocking start
Member since November 2014
Posts: 6
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Post by ilyakubus on Nov 26, 2014 12:08:42 GMT -5
Thanks Rockoonz, that is actually what I was going to use, as I have a bunch of copper tubing and fittings left over from 10 years of construction
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