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Tool grinder Interwood

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Nick spanners

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#1
84D8D714-3281-4D76-9CC2-8082A5CF92B1.jpeg Hi
I recently purchase an interwood tool grinder off eBay, type MK VI. 345
It seems an interesting machine
Just wondering if anyone has a manual or experience with these

The motor / grinding wheel can be adjusted to any angle, the motor can then the wound up and down
The tool holder can be adjusted to a multitude of angles, the moved in / out to the grinding wheel

The machine looks to have many options for grinding different tools
I can not immediately see how I would grind a drill?
Any feed back would be apreciated
7FBC5894-C494-4572-B336-DC90051D1768.jpeg
7FBC5894-C494-4572-B336-DC90051D1768.jpeg
84D8D714-3281-4D76-9CC2-8082A5CF92B1.jpeg
 

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pstemari

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#2
Depends on exactly what sort of grind you want, but for a basic four-facet grind you'd need to rotate that fixture 31° in the horizontal plane and vertically about 7° to grind the primary relief, and then increase the vertical angle a bit more to grind the secondary relief. That holder should have a facility to rotate the drill 180° in place.

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Nick spanners

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#3
The general grinding principle looks to be in at a Tangent to the grind stone
 

Nick spanners

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#4
The general grinding principle looks to be in at a Tangent to the grind stone
The holder has a 12-hole indexing head with fine adjustment via two bolts on top
 
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