NAST555
Stainless
- Joined
- May 23, 2008
- Location
- Gauteng, South Africa
So I have a customer that always specifies flat bottom holes in flanges... Truthfully I know the application and it is not needed but they INSIST on it so how I normally do it is drill 10.2mm with a carbide stub either helix or plunge out the last bit to a flat bottom (depending on what cutters I have lying around) and then tap M12. We opened up a small tool supply place and one of the agencies that supplies to us are the agents for OSG over here.
I flipped through their promotional brochure and found these EXOCARB ADF Drills - OSG
This way if I can just drill with it I can remove the flat bottom operation. Even if it is not perfectly flat it does not matter, it just needs to look flat. Anyone used these? Do they work as well as normal drills? The material in question is generally structural steel W302 normally. What are the advantages over a slot drill (normal centre cutting 2 flute endmill)? I generally dont like plunging with a slot drill because the material is sometimes a bit bent and not always have the most rigid fixturing because of shapes of the parts but have never had one move from normal drilling/tapping.
Normally about 1000 holes on a run of parts and not deeper than 2XD
I flipped through their promotional brochure and found these EXOCARB ADF Drills - OSG
This way if I can just drill with it I can remove the flat bottom operation. Even if it is not perfectly flat it does not matter, it just needs to look flat. Anyone used these? Do they work as well as normal drills? The material in question is generally structural steel W302 normally. What are the advantages over a slot drill (normal centre cutting 2 flute endmill)? I generally dont like plunging with a slot drill because the material is sometimes a bit bent and not always have the most rigid fixturing because of shapes of the parts but have never had one move from normal drilling/tapping.
Normally about 1000 holes on a run of parts and not deeper than 2XD