MadModder

The Shop => Tools => Topic started by: NeoTech on April 16, 2013, 07:27:26 AM

Title: Using a dimond grinding cup in a mill.
Post by: NeoTech on April 16, 2013, 07:27:26 AM

Im thinkng if its possible to make an arbor and put a diamond grinding cup in a arbor using it my mill. I have 800 grit grinding cup and think it could be a neat way finishing off surfaces that need to be really flat.. Opinions.. crazy talk?

Title: Re: Using a dimond grinding cup in a mill.
Post by: Pete. on April 16, 2013, 09:44:15 AM

Electroplated diamond or CBN cupwheel? If you use an electroplated diamond wheel dry on steel the diamonds will break down pretty quickly.

Title: Re: Using a dimond grinding cup in a mill.
Post by: 75Plus on April 16, 2013, 10:07:06 AM

Diamond dust can DEVOUR the ways and gibs of a mill. Once it gets imbedded it is nearly impossible to remove.

Joe

Title: Re: Using a dimond grinding cup in a mill.
Post by: NeoTech on April 16, 2013, 02:04:11 PM

I have somekind of resin bonded cup on a aluminium base that i bough from CTC tool..

And yes i know diamond dust is bad for the ways.. i need to cover **** up when doing this i imagine..

Title: Re: Using a dimond grinding cup in a mill.
Post by: DaveH on April 16, 2013, 02:33:42 PM

If you going to use a diamond wheel on steel you will need to use a flood coolant, otherwise the diamond wheel will be destroyed.
Something to do with the heat and carbon-carbon attraction  :doh:
 :beer:
DaveH

PS. most manufactures only recommend diamond grinding wheels to be used on non ferrous materials.

Title: Re: Using a dimond grinding cup in a mill.
Post by: NeoTech on April 16, 2013, 03:38:23 PM

Hmmm so not a diamond cup then.. i dont own a surface grinder.. so how would one go about it then?!

Title: Re: Using a dimond grinding cup in a mill.
Post by: philf on April 16, 2013, 03:40:28 PM

CBN (Cubic Boron Nitride) wheels are readily available for grinding of steels. Keep your diamond wheel for carbide.

I have a diamond cup wheel and a CBN cup wheel which came with my Quorn T&C grinder (which my much missed mate bequeathed to me). I don't know which wheel is which - is there a simple way of finding out?

I tried using an Al2O3 cup wheel on my mill to grind a steel part taking all necessary precautions to keep grinding dust at bay. Putting on a small enough feed was too hit and miss to make it comfortable to use.

Phil.

Title: Re: Using a dimond grinding cup in a mill.
Post by: vtsteam on April 16, 2013, 05:44:05 PM

Quote from: philf on April 16, 2013, 03:40:28 PM

CBN (Cubic Boron Nitride) wheels are readily available for grinding of steels. Keep your diamond wheel for carbide.

I have a diamond cup wheel and a CBN cup wheel which came with my Quorn T&C grinder (which my much missed mate bequeathed to me). I don't know which wheel is which - is there a simple way of finding out?

Maybe try to scratch a piece of carbide on a wheel edge (not running). If it scratches on one and not the other, it's diamond.

Title: Re: Using a dimond grinding cup in a mill.
Post by: hopefuldave on April 16, 2013, 09:24:06 PM

Nope, CBN is also harder than carbide, not far off diamond hardness... Sounds to me like a pretty universal wheel, other than cost, what's the downside? There has to be one...  :D

Dave H. (the other one)

Title: Re: Using a dimond grinding cup in a mill.
Post by: chipenter on April 17, 2013, 04:09:08 PM

I have been thinking on the same lines , I have had a resin bonded diamond wheel on my bench grinder for eighteen months with no visible where , used for carbide and the soft steel under the tips , but you have to be gentle with it doesn't cut any quicker if you lean on it .