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Thread: Bench Grinder wheel balancing
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23rd June 2019, 10:09 PM #1
Bench Grinder wheel balancing
Saw this on a YouTube channel I like,
Thought it had some merit.
https://youtu.be/6TA5vf510Vo
Also if you like Bugatti as I do.
Follow there channel it is well worth it.
Cheers Matt.
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23rd June 2019 10:09 PM # ADSGoogle Adsense Advertisement
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23rd June 2019, 10:37 PM #2
Just get a CBN wheel. It comes balanced, and does not wear.
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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23rd June 2019, 10:43 PM #3
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23rd June 2019, 11:08 PM #4
I've always balanced the wheels by drawing a line on the wheel at the nut, then spinning it. Use the line as a mark to turn the wheel on the shaft. Spin again. Stop when the vibration is least.
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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23rd June 2019, 11:16 PM #5.
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23rd June 2019, 11:31 PM #6.
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The other type of metal I sharpen fairly often on my CBN wheel is Crobalt specifically as MW lathe tips.
Just As HSS is an iron based alloy, Crobalt is a cobalt based alloy with the remainder being Tungsten and Chromium, their carbides, plus additives. Even though it contains carbides which are vey hard, the overall hardness of Crobalt is some 3 HRC points softer than HSS but it's much tougher than HSS so it's edges do not wear away as fast as HSS. Normally Crobalt bits are sharpened on a 40-60 grit Alox wheel so one would think that they should not impact a CBN wheel. Perhaps they do, but even chaps on the MW forum members who don't use Crobalt are finding their CBN wheels are wearing.
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24th June 2019, 10:51 AM #7
Bob, I suspect the wear on a CBN wheel is similar to that on a diamond stone: the grit is embedded and not perfectly even. Use evens it out. Up until that time, it cuts more aggressively because of the errant bits. once levelled, it settles down to sharpen reliably, but not as aggressively. I have 15 year old DMT diamond stones that I thought were worn, but still cut.
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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24th June 2019, 11:30 AM #8
Well this thread seems to be on CBN wheels now [emoji849][emoji849]
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24th June 2019, 12:48 PM #9.
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25th June 2019, 06:19 PM #10Senior Member
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Personally, I would have mounted the wheel and trued it as the first step. It is obvious from the video that the wheel is slightly eccentric when mounted, and this probably accounted for most of the unbalance. The balance weights may not have been necessary.
Chas.
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25th June 2019, 11:37 PM #11
Its a double barreled thread now by the looks Matt
That's a pretty interesting way of being able to adjust balance.
But balancing works by carefully dressing the wheel as well doesn't it ?
If you use a diamond dresser and hold it so just the high spot touches each pass of the wheel you dress it true don't you ?
Rob
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26th June 2019, 09:59 AM #12
I wonder if based on the quality of the grinding wheel and consistency of the aggregate, the wheel may not be a uniform density, which would mean that being exactly round won't guarantee ballance?
Lance
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26th June 2019, 03:24 PM #13
I suspect that like diamond embedded abrasives CBN will vary in quality depending on the brand, and consequently price. A cheaper CBN wheel may not have the same depth of abrasive as a more expensive wheel and thus wear out faster.
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26th June 2019, 03:51 PM #14
I guess your right bench grinders have a common shaft too mound two different wheels [emoji849]
I give in [emoji106][emoji106]
I would say if you just dress the front of a wheel yes it is now “true ie perfectly round”
But the sides could still cause an out of balance wheel.
Cheers Matt
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28th June 2019, 09:00 AM #15Member
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