CBN wheel for shaping

[kosh]

Hi,

I've currently got 46 and 80 grit white wheels on my grinder but whenever I need to reshape a tool or change the bevel angle the grinding takes forever .... and I'm sick of the dust generated from dressing the wheel all the time :)

so I'm thinking of getting an CBN wheel to reshape turning tools. I was wondering what grit size would be most appropraite for this - my reading suggests 80? I'm happy to continue to use the 80 grit white wheel for resharpening at this stage - the CBn would only be for major grinding ....

many thanks,
Paul.

[Pat]

Paul, I run Woodcut 80# for reshaping and 180# dry and wet (Tormek), for sharpening.

The 80# requires a soft hand and eats HSS.

[Jim Carroll]

Kosh the 80g (http://www.cwsonline.com.au/shop/item/vicmarc-200mm-x-40mm-x-80g-cbn-wheel) is ideal for reshaping all HSS turning tools , as Pat indicates light hands are still needed as you can wear away the tool very quickly.

THe 180g (http://www.cwsonline.com.au/shop/item/vicmarc-200mm-x-40mm-x-180g-cbn-wheel)is the ideal wheel for sharpening the tool but again light hands are needed.

[DaveTTC]

Just adding a question to this thread .... is 180 fine enough for a keen edge?

I have seen some CBN wheels as fine as 320. Is 320 overkill?

Dave TTC
Turning Wood Into Art

[Jim Carroll]

180 is fine enough for turning tools

280 is what is used on the tormeks for finer finishes for tools that require a better finish

[Evanism]

I use the 180 for all sharpening. It is excellent.

It would be fantastic to have something finer than this, say 320.

The coarser ones need a light touch. The 80 is unbelievable for grinding and reshaping. As Jim says, very light touch! You can see the HSS vaporising in front of your eyes!

[Oldgreybeard]

I agree with evanism - I have a 180 grit on my Tormek 1200 and it is brilliant. I do use the leather wheel to give my skews a final hone.
Bob

[kosh]

thankyou everyone for your replys and information - much appreciated. It looks like the 80 grit will do what I need for now.

bye for now,
Paul.

[Don McLeod]

The 180 is a good grit for sharpening and I suspect you will need nothing finer. A light touch is also required. Reed Gray (AKA Robo Hippy)an american wood turner has written an excellent article on CBN wheels and can be found at this link.
http://www.robohippy.net/featured-article/