Point Form Cutters

[GONRA]

GONRA made an Eccentric Spindle Indexer that screws directly onto my SB lathe spindle
to grind RADIAL RELIEF onto 1, 2, 3, 4 flute cutters.

Eccentricity is dialed in with 1 inch 40 tpi clamp screws.
Verkpiece (cutter, end mill, tiny number drill, etc.) centering is established optically
with a 40X "milling machine lineup/centering scope" mounted in lathe tailstock.
Grinding is with a Wholesale Tool electric hand grinder mounted on the lathe compound.
Verkpiece is chucked up in a 3/4 shank ER-16, ER-20 or.... commercial collet
mounted on an indexing wheel.

Etc. Etc. Etc......
I know, just lottsa GONRA crapola but it verks Just Fine
Just keep Lathe Spindle Speed down!

[barryjyoung]

So that's it? 6 years of silence? Has anybody considered making their own point form reamers? I have a Gorton tool and cutter grinder I am going to see if there is a way.

[IllinoisCoyoteHunter]

6 years of silence? This thread isn’t even a year old lol. Yes they can be made. They have been made. There’s several ways to skin a cat. I was going to try to get a handful of people in on a group buy but had very little interest. Had some family things come up and just haven’t had much time.

[GONRA]

IllinoiosCoyoteHunter - GONRA sez - don't forget RADIAL RELIEF. !!
That's the hard part! !!
Make sure yer Gorton can handle it.....

[IllinoisCoyoteHunter]

It’s not hard when you make them on a cnc grinder lol