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How are four facet drills shapened on a tool and cutter grinder?

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sparky961:
That Meteor grinder sounds like just what I need.  Still see any around?  Meh... shipping would kill me.  But on second thought, could be worth it when you consider the time and uncertainty with my other idea.

What is the mechanism and/or technique to get the point dead on with the Meteor?

sparky961:
Seems popular.  Seems expensive.  I quick perusal of eBay located one:

http://www.ebay.ca/itm/EXTREMELY-RARE-SWISS-MADE-METEOR-KBS-3-TWIST-DRILL-TOOL-GRINDER-NEW-OLD-STOCK-/252552447022?hash=item3acd4c842e:g:ZxYAAOSwCGVX5BIQ

Biggles:
There are a few cheaper items around ranging from Record to Tormek which have a Jig for 4 facet drill grinding
 :)

Metalman:
Thanks John for having spent so much time to give me such a detailed explanation, very interesting.

If I were a younger man I may have looked out on ebay, etc. to see if I could locate one like the first machine going at a reasonable price. Nowadays it would be just a novelty as I have done nothing of any size in the workshop for a few years and that is not likely to change.

Thanks again.
Harold

Houtenkrullen:



--- Quote from: John Stevenson on March 16, 2017, 06:55:07 PM ---Harold,
 I have two machines that can do 4 facet, well one is close but more later.

One is a German Meteor drill grinder that goes from 0.1mm up to 6mm in two stages. ).1mm to 3.2mm and 3mm up to 6mm on a second collet.........and because they are not so well know they can be picked up cheap. I paid £40 for this off Ebay.

--- End quote ---

John, I have been looking for one like this for some time. Apparently they are better known in the Netherlands, because I haven't seen one anywhere near that price. More like €600-750.
Do you have the user manual of the machine? I am very curious about how it achieves such a high accuracy.
Peter

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