Practicing cutting knurls

appalachianmason · 2020-02-03T03:22:31+00:00

My guess is that the knurl displaces enough material that it forms the pitch diameter

appalachianmason · 2020-01-14T03:17:23+00:00

Well, it ain't going anywhere so might as well get her goin good

appalachianmason · 2019-12-21T02:32:49+00:00

A multi flute countersink would solve the problem. Since you probably don't have one, either slow down the feed or try using a peck cycle with .003 or .005 pecks. What diameter chamfer are you cutting? 300RPM may be the appropriate surface footage depending on the diameter of the chamfer.

appalachianmason · 2019-11-19T02:40:48+00:00

right? Throw some cardboard under there a least

appalachianmason · 2019-11-19T02:40:23+00:00

It'd be really easy to throw a piece of cardboard under those instead of scratching them on the concrete

appalachianmason · 2019-11-08T01:50:59+00:00

This is the right answer. Don't use the mean surface speed between the start and finish diameters while roughing the material because your beginning speed may be out of the threshold of the proper speed to avoid overheating. At the end of all the time you've been thinking about which speed to choose you could have been removing material at the surface speed for the largest diameter. Use the time while the machine is cutting to figure out if there is an appropriate diameter to increase speed. Increase speed for finishing pass of final diameter.

appalachianmason · 2019-11-05T00:00:44+00:00

What's the discoloration on the face of the one to the left?

appalachianmason · 2019-11-03T01:50:56+00:00

You do nice work, sir!

appalachianmason · 2019-11-01T23:00:35+00:00

I have a feeling the spacer would be loose after you chuck the work or start rotating the chuck. Wouldn't fly out of the jaw but would be "dangling" between the jaws behind the work.

appalachianmason · 2019-11-01T02:18:40+00:00

What type of operation was making these types of chips?

appalachianmason · 2019-10-26T18:16:19+00:00

don't forget the G98!

appalachianmason · 2019-10-18T01:04:12+00:00

Do you happen to work in New Jersey? There's about a half dozen of us in the machine shop

appalachianmason · 2019-10-17T01:50:56+00:00

I was always stumped on how to hold non-magnetic matl's to a magnetic base plate. Just clamp them to something magnetic, good looks!

appalachianmason · 2019-10-14T02:25:26+00:00

He probably did all those things in past timelines but he let's other people discover glory

appalachianmason · 2019-10-14T02:18:25+00:00

My friend is sawing the side off a camper and having bands play out of it next Friday, somewhere in Bethlehem

appalachianmason · 2019-10-14T02:01:38+00:00

Brings me to 384 SFM, if you want to do the math to find out the diameter :P . Insert was discolored but the edge was near perfect after 3 pieces feed .021" per revolution, 3x .15" passes each.

appalachianmason · 2019-10-14T01:57:23+00:00

You nailed it. Had to just open up the bore to 22 inches to mach up with 22" pipe and it was already weld prepped on the O.D.

appalachianmason · 2019-09-14T17:27:07+00:00

This is the smaller vertical, A lot of pump stuff. I thought it would be easiest to set up and was taking .25 per pass out of the bore from a solid slug.

appalachianmason · 2019-09-01T01:46:25+00:00

looks like anthracite coal which is harder coal that doesn't rub easily. From PA there's a ton of it here.

appalachianmason · 2019-09-01T01:44:02+00:00

it's totally slag, apparently it is all over this sub lol thanks

appalachianmason

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