AR15.Com Archives
 Need tool and cutter grinder advice
wintermute76  [Team Member]
10/21/2011 4:16:41 AM EST
Looking to talk the shop into a grinder for sharpening our stuff. I need it most for a 3 tip tool that needs additional relief for cutting a helical groove thru a bushing.
It would also get used for end mills and drills etc.
I used a Monoset a little back in college for end sharpening mills and we had a Deckel my old job for grinding carbide splits.
Here's a pic of what I'm trying to do. It pushes up a burr due to insufficient clearance. I got lucky hand grinding the old insert, but can't seem to duplicate it.


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Cole2534  [Team Member]
10/21/2011 6:31:40 AM EST
Practical Machinist will have your answer.

Most of us around here would be damn happy just to have a surface grinder, must less a T&CG.
wintermute76  [Team Member]
10/21/2011 6:35:25 AM EST
I'll have to post over there, not even sure I remember my password there

Our shop here is kinda odd, they'll buy a new mill for no real reason, yet just throw out dull tools

ETA: wow 2 years since I logged in there last.
WildApple  [Team Member]
10/22/2011 3:19:50 AM EST


I'm not sure about carbide cutters but high speed steel could be done with a surface grinder. You would need to dress the wheel for the couture of the cutter and probably use a sine plate and a spin indexer
Cole2534  [Team Member]
10/22/2011 5:00:35 AM EST
Originally Posted By WildApple:


I'm not sure about carbide cutters but high speed steel could be done with a surface grinder.

Should just be a matter of wheel choice.



Posted Via AR15.Com Mobile
WildApple  [Team Member]
10/23/2011 4:11:23 AM EST

Originally Posted By Cole2534:
Originally Posted By WildApple:


I'm not sure about carbide cutters but high speed steel could be done with a surface grinder.

Should just be a matter of wheel choice.



Posted Via AR15.Com Mobile

What type of wheel did he use to hand grind the one in the picture?
wintermute76  [Team Member]
10/23/2011 4:33:53 AM EST
Diamond cup wheel on a bench grinder.
WildApple  [Team Member]
10/23/2011 6:57:46 AM EST
These guys may be able to set you up

http://www.leechcarbide.com/
AeroE  [Moderator]
10/23/2011 5:27:51 PM EST
Check the St. Louis Craigslist, I saw a Deckel grinder on there recently.

Never mind, I think ad has been pulled.

wintermute76  [Team Member]
10/24/2011 6:18:19 AM EST
Does a Deckel even have the capacity to grind this tho? I know the one we had at Dynamic worked fine for splits, but I know nothing about any other attachments they have.

BTW these screw onto a shank when actually in use. They'd be on their shank for grinding as well.
HammerSlammer  [Member]
11/29/2011 7:04:47 AM EST
Carbide indexable inserts, special as well a standard profiles, are routinely cut on Wire EDM machines.

Grinding carbide tools requires diamond or silicon carbide abrasive wheels.

Enjoy the journey.
wintermute76  [Team Member]
11/29/2011 12:00:27 PM EST
Carbide takes forever to cut with WEDM. Used to do it

Ended up finding a custom cutter shop, $38 each to relieve them.
After a bit I may be able to talk them into justification for a Monoset.
shrikefan  [Team Member]
12/23/2011 1:46:07 PM EST
I know it may be bad practice, but can you start the cut from the bottom and interpolate it upward? It looks like there may be more clearance on the top of the cutters but I can't really tell for sure by the pictures.
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