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grinder woes "long"

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grinder woes "long"

#1

grinder woes "long"

dominic palazzola

>hello everyone this is my first post here in turning.

iv been woodworking for a few years and just recently decided that i wanted to do a little turning, chair spindals and such. so after doing some searching on google groups and reading i decided on the 12 x 35" lathe from harbor freight and there hss tools. seemed like everyone says this is a good deal for a beginner and i caught the lathe on sale for 179.00 and thre tools for 29.00. so here i was with this lathe and tools and soon found out that i needed to learn to sharpen these lathe tools. so off i am again in search of the best way to sharpen these tools, i ended up at oneways site and chose the wolverine system. on there recomendation i chose a 8" 3450 rpm grinder,, so off to the delta service center i pick up a grinder and then off to woodcraft and buy the wolverine jig,skew attachment,dressing jig. keep in mind here all i want to do is turn a few spindals and i see the dollars adding up fast. so i get home and i follow oneways directions and mount the grinder and jig to a base and start learning to sharpen. and at first all is going pretty good, after about a dozen sharpening sessions the grinder starts vibrating very badly and only gets worse,, did the dressing jig thing and that didnt seem to help. so off to woodcraft again and pick up a new 80 grit wheel and mount that. well the shaking and vibrating is worse then the stock wheels that came with the grinder. scratching my head i remove the wheels all together and turn the grinder on and all is running smooth. put the 60 grit stock wheel on and runs pretty smooth, take that off and put the 36 grit wheel on and the shaking is terrible, take that wheel off and put the new blue 80 grit wheel on and the shaking is worse then the last wheel. hhmmmm so now im thinking that i need to buy the balancing kit from oneway. so on further observation as the grinder is slowing down i can see alot of side to side wobble in the three stones, is this normal? are these defects in the wheels or is there some way to dress the wheel sides? am i approaching this whole thing wrong? before i spend any more money id like to know if im missing something here. at this rate by the time im done putting this sharpening system together i am going to have a lot of money invested to just turn spindals.

Re: grinder woes "long"

#2

Re: grinder woes "long"

Jim DeLaney, Tustin, CA

>You need to dress the wheels to perfectly round. A diamond tipped whel dresser, or one of the 'old style' star wheel dressers will do wonders in truing them up and taking away most - probably all - of the vibration.

Enco, etc will have the diamond dressers for not too much - under $20 - depending on the size you get. The star wheel dressers are about the same price.

Jim D.


Re: grinder woes "long"

#3

Re: grinder woes "long"

John Lucas

>Sounds like the wheels are out of balance or off center.

The first thing to do is get the wheels as close to centered as possible. Do this by rotating the wheel by hand and hold a pencil so it touches the stone on the high spot. Use the tool rest from the oneway system. Loosen the bolt and adjust the wheel by pushing on the high spot. Check again. Hopefully the pencil line got longer. Keep doing this until the pencil line goes as far around as you can get it.

Now the stone should be much closer to being balanced but will probably be slightly out of true. I use a diamond hone to true it up the rest of the way. If the wheels fit the shaft perfectly (most don't) you could skip the pencil thing but I've found that most have a little slop and can be improved greatly by centering them.

Re: grinder woes "long"

#4

Re: grinder woes "long"

dominic palazzola

>jim thanks for responding,

i do have the wolverine dressing jig, i approached the wheel with the diamond slowly till i had full contact across the width of the wheel and continued till it stopped. should i continue with the dressing some more?

thanks again

Dom

Re: grinder woes "long"

#5

Re: grinder woes "long"

Bruce McElhaney Spring Lake, MI

>I see Oneway recommends a high speed grinder with their own wheels. I can't speak on how that combo works out. But in general I don't go along with using a high speed (3450 RPM) grinder for grinding woodturning tools. High speed grinders can easily overheat your tools. I use a low speed (1750 RPM) grinder with high Quality, Norton white friable wheels. The wheels still need to be balanced, trued and dressed. Then there's another subject about sharpening techniques and skills that needs to be addressed.

Re: grinder woes "long"

#6

Re: grinder woes "long"

John F.

>Just a suggestion, to check for out of round, I would advise marking the entire outer surface of the wheel with a pencil, dont have to be even, but mark it all the way around, then dress with your diamond dresser from oneway. then stop the grinder and check to see that the pencil mark is gone from all the way around it.

this should at least make sure that the wheel is totally round, if that doesnt fix it, the wheel is truely bad...., or so I would believe...

John F.

Re: grinder woes "long"

#7

Re: grinder woes "long"

dominic palazzola

>ok i took all your input and spent some more time dressing the wheels with the diamond and i have the grinder running smooth again, thanks a bunch fellas.

Dom

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