Milling 37 degree chamfer around a circular piece...

[peter.blais]

Hi, I'm trying to think of a good way to mill a 37 degree chamfer around the OD of a circular piece. Odviously because its a circle I can't just tilt the part 37 degrees... well, I could tilt a rotary table, but I dont' have one.

Anybody know of a chamfer tool which will cut that angle? Trying to think of a way to do this without a whole ton of setup.

Thanks

Peter

[Karl_T]

if its a one of, just make up a fly cutter. You'll have to go slow, light cuts.

Karl

[peter.blais]

They are small diameter, like... 3/8" and I'm doing a couple hundred at a time. That said, theres not a ton of material to remove, its a very small chamfer.

[Karl_T]

You need find find someone with a deckel style one flute grinder. This machine can quickly make up a small cutter for this.

Or order a custom chamfer tool made.

Karl

[peter.blais]

Yea, thats what I figured... I did see an adjustable carbide insert chamfer once, somewhere...

Any idea about what I should pay for a HSS 2 flute or 3 flute small chamfer custom made to that 37 degree? I've never had any tools custom made before...

[Karl_T]

You're not going to have much luck getting a deal on a one of like that. $50?

You might post here for a fella with a deckle style single flute cutter grinder to make up a tool. This should be cheap, but you'll have only one cutting edge.

Karl

[Rabies]

Lathe not an option?

[peter.blais]

Not yet... hopefully someday soon.

[Kiwi]

Grind the centre out of a 1/2'' drill.
This can be done quite successfully with a 4in angle grinder with the disc dressed to a thin edge.

[InspirationTool]

Page 155 in MSC... but ouch... $300+.

I'd have one ground if you can....

The other option would to have Severence grind a custom OD chamfer tool for you.

-Jeff

[fpworks]

I would definately have a custom ground tool made for this. Check out Garr Tool or Internal Tool as well.

[dertsap]

is this on cnc or manual ? if it's cnc simply grind an old carb endmill to 37 deg and interpolate , grinding one flt to size and grind the other flt off ,makes it easier