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1000 grit CBN wheel

Posts

1000 grit CBN wheel

#1

1000 grit CBN wheel

robo hippy

Well, I have to experiment. I recently got a 600 grit wheel from Ken Rizza, and the cutting edge results were significantly better on both gouges and scrapers. The scraper burr was excellent for shear scraping, but wasn't big enough or heavy duty enough for heavy roughing. Same with the gouges. Couldn't notice a lot of difference with the skew though. Well, again, my curiosity got the better of me, and I ordered an 8 inch 1000 grit from Ken, just because..... I have only had it out in the shop for an hour or so, but maybe there is hope for me and the skew chisel after all... Scraper burrs were about the same, both standard and negative rake. The skew, well it made a big difference, which probably means I never learned to sharpen one properly. I did find that I was getting different results going from left to right and from right to left on a piece of highly rippled sugar maple. I had not honed off the tiny burr. So, took the 600 grit CBN hone to it and the results switched. After several very light honings, there was no difference, and I was leaving a nice slick surface that before I was getting tear out that I could only tame with a 600 grit burr shear scrape, but I can cure just about anything with that. I still need a hundred or two hours of play time for any definite results, but that just makes every thing more fun. I will have it on my grinders down in Atlanta.

Now to see if I can find the second myrtle plank that is hidden in my shop. Turned most of the first one yesterday and today...

robo hippy

Re: 1000 grit CBN wheel

#2

Dick Hines

Re: 1000 grit CBN wheel

dick hines

Can a cbn wheel be used on a high speed grinder? I have a old grinder that belonged to my grandfather. I don't want to add the price of the CBN wheels to the cost of a new grinder.l

Re: 1000 grit CBN wheel

#3

Dennis in Southern Oregon

Re: 1000 grit CBN wheel

Dennis in Southern Oregon

I used an 80 grit cbn wheel on my Delta 3500 rpm grinder with no problems for a couple of years before I found a bargain on a 1750 rpm unit and switched to it.

Re: 1000 grit CBN wheel

#4

Re: 1000 grit CBN wheel

john Lucas

Dick I forgot to respond to you the other day when you asked that. I went to the shop and switched my grinder to 3450 and ran it. It seemed to work just the same. That is with a DWay CBN but the Ken Rizza CBN's high grade aluminum so I don't see why they won't work either.

Re: 1000 grit CBN wheel

#5

Re: 1000 grit CBN wheel

robo hippy

Dick, if you want a fairly long read about CBN wheels, there is one on my web site. Answers just about everything:

http://www.robohippy.net/

I don't think I would put the 600 or 1000 grit on a high speed grinder. They do make the 1000 grit for the Tormek and clones of wet slow speed grinders.

robo hippy

Re: 1000 grit CBN wheel

#6

Re: 1000 grit CBN wheel

John K Jordan

I just got a 600 grit from Ken that I will put on a 1/2 speed grinder. I'll compare the grind I get with that with the 600 wheel on the very slow Tormek turning the opposite direction.

It will be interesting to hear what you think about the grind from the 1000 grit wheel after you break it in - I think your article said that took about a month for the coarser grits, right?

Hey, what do you like to turn out of myrtle? I have a big slab of myrtle I got from Gary Evans years ago and I've never cut into it. What is myrtle like to turn?

JKJ

Re: 1000 grit CBN wheel

#7

Re: 1000 grit CBN wheel

robo hippy

I guess the most interesting observation for now is the burr, which even though it is tiny, it makes a difference and I may need to put some honing compound on my old Tormek. Break in time depends on how much use it gets, and my 600 grit wheel is not broken in yet, and I am not production turning any more.

Myrtle, which is really California Bay Laurel, and not a myrtle at all, is a beautiful wood. Some times is smells sweet and spicy, and other times it smells like it came off the bottom of a horse stall. The wood is pretty hard, similar to oak or maybe hickory, and has an interlocking grain. It also tends to be abrasive, which is why the big ugly tool works so well on it. When sanded to high grits, it really glows.

robo hippy

Re: 1000 grit CBN wheel

#8

Re: 1000 grit CBN wheel

john Lucas

I'm drooling over the 1000 grit if I can get one to fit my Tormek. Tormek says their wheel is 1000 grit if you use the fine stone on it. I don't think so. It leaves noticeable lines in the steel. Maybe Ken will have one at the AAW symposium and I can bring my magnifier to look at the steel. Come to think of it I should grind one end of a HSS cutter with my tormek and then the other with the 1000 grit wheel and see what the scratches reveal.

Re: 1000 grit CBN wheel

#9

Re: 1000 grit CBN wheel

Jorge Castaneda

John,

I've turned myrtle, also from Gary, I made a couple platters, it tools nicely.

Re: 1000 grit CBN wheel

#10

Re: 1000 grit CBN wheel

robo hippy

At present, the edge is much finer than on the 180 wheels. The scratch marks are not as polished as the 180 grit though, and pretty much identical to the 600 grit when viewing. They get much more polished looking as they break in.

robo hippy