Grinder Wheel Side Wobble
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- čas přidán 22. 07. 2021
- I've been searching for a decent low speed grinder that's of equal quality to my high speed Baldor to use for sharpening my woodturning chisels. When in the store, every grinder I've tested all seen to have the same side to side wheel wobble. My Baldor never had that issue.
I've wondered how so many turners can use the same import grinder and not complain. I've come to the conclusion that some aren't as picky as I am OR they're using shims to correct the issue, or use the special self aligning washers I came across, that absolutely worked.
Self-Aligning Spherical Washers: woodturnerswonders.com/collec...
Machined Aluminum Washers:
woodturnerswonders.com/collec...
Wheels purchased from woodturnerswonders.com:
Radius Edge CBN Wheel 8-inch, 5/8" arbor - 80 grit
Mega Square 8" CBN Wheel, 5/8" arbor - 350 grit
Grinder: Rikon 80-808 slow speed 8" wheels - Jak na to + styl
Thank you so much for this review. I had a problem with my grinder and didn't have a clue how to fix it. Now I'm off and running excellent work.
Great video, thank you for sharing
I enjoyed the multiple attempts to screw the nut onto the left handed shaft thread clockwise.
Your original problem is not a problem with the grinder, but in the grind stones. I have the same grinder, and had the same situation, with the original white stones, As soon as I installed CBN wheels, without any fancy spacers or washers, the problem disappeared. I have been using this set up for four years now, and they are still running true, without me having done any further adjustments.
I should have tried testing the wobble without the spherical washers to see if the problem carried over to the cbn wheels and if I needed them. But seeing as how when I tighter the nut they shifted over a bit I think I did benefit using them.
It’s the crap stamped steel washers on those original stones, just look at them, no turning marks to true each face to each other and one moose with a big wrench and the washers are toast, machined washers or a machined washer collar are the fix plus feather torque on the shaft nuts and it’s all good to go
Absolutely.
Not referring to the side wobble here, but i thought id throw something out.
One of my wheels was running true, but out of balance.
I decided as counterweights, to add a large washer to both the inside of the wherl and the outside next to the nut.
Were talkning a large fender washer size.
I planned to remove 25 or 30 ish percent from onevside of each washet.
One side would be lighter, the other side heavier.
Anyway before shaving, the side off of one washer I installed it. Then I installed the grinding wheel with its original washers.
I tighten the nut finger tight
I became quite alarmed when loosenung the grinder nut that's how I just installed finger tight, quite gently.
Somehow with a second washer on the inside of the grinding wheels original washer, this tightened up the nut so tight that i needed a wrench and a hammer to tap the nut loose.
The torque from the grinder revving up allowed the wherl to slip, thus tightening the nut way more than finger tight.
I decided then not to invent a better mousetrap.
Great video, thanks for making it. 👍
If both wheels are running true but off balance and you dressed the edge of the wheels so they are flat I’m not sure what would cause your off balance. Maybe the density of the wheel isn’t consistent.
@@thewoodwork_ca
You just responded to another person and I kind of rewrote what I just said here.
I took so long to type, you replied to me also so I just saw this.
Anyway, no i wasn't dressing the sides of the wheels.
I had trued up the roundness of the stone and was trying to add modified washers to act as a counterbalance.
imported to where?
I'd love to see you try those fancy washers with one of the original wheels to see if it helps out
I just spent some time trying to get an original white Rikon wheel to run true using the spherical washer set. What I had to do was slide their fitting offside (the way they fit together) to create a slant the way a shim would work. I did get them to run true to a really acceptable amount but I don’t like how much work I had to put into it. If the wheel moved position on startup I’d have to redo it all unless I marked the positions of everything. But these would work the best over sticking shims or paper so I recommend them still.
@@thewoodwork_ca very interesting, I wonder why the quality is so low on these high end tools
@@TheGrantAlexander Thanks China
Those new wheel should run true for the price they cost and most likely you didn’t need to waste money on those dished washers, just get a sleeve of proper length.
Many can’t afford those very expensive wheels
The wheels running true is not the problem. The grinder you put them in is almost always the issue (arbor, flange washers).
I have made a padestal for my 8 in bench grinder. It weighs about 37 lbs. The problem is that when I switch off the grinder and it is slowing down it tends to resonate and vibrate at 2 rotating speeds. Can u suggest a solution. Thanks
There’s lots of stuff on the internet of things to try but other than making sure your shaft isn’t bent or your flanges aren’t flat, most people blame the wheels. CBN wheels are balanced and you can’t dress them so they can go out of true or balance. Lots of things can cause a wheel to be unbalanced like the weight or density of material heavier on one side. If the wheel loose and hanging on the shaft, you tighten it and dress it true that means you took material off one side more so it’s not the same density all around any more. Make sure those bushings are super high tolerance. Plastic loose ones could make you true away your wheel badly.
How wide are your can wheels and what did they cost. Thanks
I got them from woodturnerswonders.com 8” radius and an 8” mega square. 1” face. Prices are on their website, great people to deal with.
All very confusing, you show a wobble on the white grinding wheel, then use the special washers on the diamond wheel, which you didn’t check first..
If those special washers are a snug fit on the shaft, there’s no way they can move to give any adjustment…
You should have used them on the white wheel to see if there was any improvement…
Assuming the shaft diameter and the grinding wheels inner diameter are within .00005" ?
Off camera I did test the Diamond wheel with regular washer and it had the same wobble. Washers are never a snug fit on any shaft so they can slide on -there is always some play.
@@thewoodwork_ca I did some experimenting myself, as I'm setting up an old 6 inch grinder.
I found a thick, 1/2" wide washer in the metric at the hardware store. Its diameter was much, much closer to the shaft diameter. As you just stated, regular washers are too sloppy of a fit. This metric one seemed like it might work, so I tested it for fit.
My plan was to lob off a good portion of one side of the washer to make it behave as a counterbalance.
Anyhow, before modifying the washers, I placed one washer on the inside against the shaft lip, then installed grinder wheel with both of the grinder washers still in place.
I wanted to see if the wheel
wobble was any better. I turned the grinder on and it was no better, no worse.
When I tried to take the nut off, I couldn't twist it off with my fingers. A dozen balancing attempts before, I had put the nut on finger tight and had been able to remove it with my fingers. 🤔
Well, with these two washers on the inside, they must have allowed the wheel to spin against the but, this tightening it.
I put a wrench on the nut and had to tap it fairly hard to get the nut loosen.
It was tight enough to be scarry.
I ditched my attempt to use additional washers for balancing.
Yes,he compared 2 different wheels with 2 different mounting techniques.
He should have 1st retested the white stone wheel with just the precision washers. If it fixes the problem, great. Or it improves, good.
Next,retest white wheel with original washers and pivoting washer set and note any improvements or degradation.
And finally, precision washers with pivoting washers and white stone wheel and check results.
That way one could PROBABLY narrow it down to a out-of-true stone or a stone with a weight distribution problem....and that's a whole new problem.
I'd make sure the white stone came from a reputable abrasive company and check the shaft with a dial indicator.
Where does Baldor get the wheels they use?
Yes you are correct. I have spoken and since fired both my writer staff as well as my producer for the confusion it has caused you. However, last weekend I put on the original white wheels, the new washers and it ran true, much better than the original washers. I originally did not test the hood washers on the old white wheels because I bought all the new items in one order (Diamond wheel and spherical washers) and was excited to get them all on.
take the labels off the wheels and remove all the glue, thats how i fixed my grinder