SEPA Milling Party?

[streaker69]

Would this work?

https://www.thingiverse.com/thing:2795464

[alpacaheat]

Looks good but we'd have to use, or compare to a retail jig to find out.

[Walleye Hunter]

OK, I was out in the garage pulling stuff but now I need to dig out a 1/4" end mill. Mine all seem to be HS. How long do the drill bits need to be? I have some pretty long ones if needed but they might be a little more difficult to weave up into the chuck. And what's the story on that drill stop collar?

And if you print a jig out and bring it along we can check it out.

[Walleye Hunter]

OK, my teacher is saying that I need 4 flute end mills and mine are all 3 and 2 flute. Any input on how important this is?

[streaker69]

Ask if you can toss in a couple of piccolos with the 2 or 3 flutes.

[t1066]

OK, my teacher is saying that I need 4 flute end mills and mine are all 3 and 2 flute. Any input on how important this is?

Weird. You tend to go more flutes the harder the material. End mills for aluminum tend to be 2 or 3 flutes. Odd numbers of flutes are to reduce vibrations while cutting. Fewer flutes also allow for better chip removal, since there is less chance the chips will bind up in the space available between the flutes. There usually isn't a problem using 4 flute end mills on aluminum, just take the feed rates a bit slower.

I'll talk to the tooling sales guy who services my work. I might be able to get a few samples from him. Given a choice, I'd go with a 3 flute end mill with a Zirconium coating. Something like this: https://www.penntoolco.com/accupro-3...-loc-37-230-0/

[Walleye Hunter]

OK, sounds good. And he also just told me that the end mill has to be long, it has to stick out 2" past the collet. That explains the long one in the picture in the link that alpacaheat posted up. I don't think I have anything that long so we will need a longer shaft end mill.

[Berncly]

Are we milling AR's, Glocks or both?

I am happy to give a demonstration of how to finish a P80 with hand tools while we wait to use the mill for the AR's.
Frightening I know, but I can do it.

Since the jig MIGHT be considered a consumable item in this operation...if people chip in $10 to use it, the replacement would probably be mostly covered.

I have this one:
https://www.80percentarms.com/produc...asy-jig-gen-1/

I did NOT buy the bits yet, but here's the sizes required:
https://www.80percentarms.com/produc...-jig-tool-kit/

1) Solid Carbide 1/4 inch end mill - custom made with super short 0.75 in flutes for optimal performance. Made in USA!
1) 3/8 Drill Bit
1) 19/64 drill bit
1) 5/32 drill bit
1) 3/8 drill stop collar

Chipping in to buy your jig is a reasonable request, it will destroy itself with use.
Same with the bits if the other guys can't supply them.
I suggest we should have 2 sets of bits in case of breakage.

Would this work?

https://www.thingiverse.com/thing:2795464

Streak, I can never tell if you're serious, but if you're coming and can print out a jig that would be great.

I'll talk to the tooling sales guy who services my work. I might be able to get a few samples from him. Given a choice, I'd go with a 3 flute end mill with a Zirconium coating. Something like this: https://www.penntoolco.com/accupro-3...-loc-37-230-0/

With your experience I would imagine your bit selection would be ideal.
Please let us know if you are able to supply bits to fit the jig.
If there is cost involved we can all split it.

------------

Walleye:
You may want to start thinking about possible dates.
Some of us may get ruled out just from the timing.
You may also want to suggest your favorite beverages and snacks.

[Berncly]

OK, sounds good. And he also just told me that the end mill has to be long, it has to stick out 2" past the collet. That explains the long one in the picture in the link that alpacaheat posted up. I don't think I have anything that long so we will need a longer shaft end mill.

Does he think one hour per person on the mill is realistic?

[Walleye Hunter]

Does he think one hour per person on the mill is realistic?

I forgot to ask.