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Author Topic:   End Mill question for you machinists out there
Dirt Roller

Total posts: 14
posted January 06, 2003 01:55 PM
Fell into a deal and got an End Mill and Lathe for free! LOL

Anyway, can anyone describe how to set up to mill a set of heads. I've got a few junk heads laying around, and would like to play around with my new toy.

Any help appreciated.

Dirt Freak

Total posts: 408
posted January 06, 2003 02:05 PM
You'll need first to spend the time to make sure the head of the mill is absolutely perpendicular to the bed, so that it will mill correctly across the length of the table as the bed moves.
You'll need the proper fixtures for holding a head and for leveling it, plus a GOOD machinist's level.
Next would come the proper milling head and tooling for it. You have to be able to mill the head all in one pass in ONE direction and not make laps back and forth across the surface.
See for the supplies you'll need and hang onto your shorts. The cheap end of the deal is over. Machine equipment for the automotive industry is pricey.

Hope that helps,
Dayton Umholtz, owner
Kinetic Performance

Dirt Roller

Total posts: 14
posted January 06, 2003 02:39 PM
Thanks for the link. You're absolutely right.........very pricey. lol

Dirt Maniac

Total posts: 135
posted January 06, 2003 06:38 PM
When you tell a machinist that you have an end mill, he will think that you have a cutter that you can hold in your hand and chuck up in a vertical mill. LOL! Tell him you have a Bridgeport, or Alliant, or a cheap Chinese mill, he'll have more respect for you. Seriously, there is a fellow that makes a large cutter just for doing cylinder heads in a vert mill, costs about $200, but you need a pretty good mill (Tight) to do an acceptable job, although it can be done. Look at a new aftermarket head sometime, you can see that they are not too concerned about cutting the whole surface in one pass. I'll dig up his info if you're interested.

Dirt Newbie

Total posts: 2
posted January 07, 2003 02:08 AM
You will need a decent test/dial indicator in addition to the machinists level to do an adequate set-up. A good sturdy fixturing will be a must,however, be careful that it doesn't distort the head when clamped. I would do alot of experimenting with junk heads before thinking about cutting on a good set. If you want to get the most out of this equipment, I would reccomend taking a night class at a local votech school and consult books available on machine theory. Wish I could stumble onto a free milling machine and lathe!!!

Dirt Roller

Total posts: 14
posted January 07, 2003 08:15 AM
Thanks for all the info guys. I do have some machinsts equipment, a good level, micrometers, dial indicators and such, and a "working" knowledge of how to use them. I'm no expert by any means. I was under the impression I could take a cutter ( like a fly cutter) and make "laps" to cut the head. I wasn't aware that it all had to be taken off in one shot.

I aim to play with it quite a bit before I try anything on a good set of heads.

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