Search found 256 matches

by choprboy
Sun Oct 06, 2019 11:37 pm
Forum: General Discussion
Topic: Steel plate identification
Replies: 22
Views: 4439

Re: Steel plate identification

... you might try annealing it if you need to work with HSS. Unfortunately, the transmission adapter plates are about 18" across... My little oven will go to 2000F, but is only about 8"x8". AR400 drills & taps well with HSS. AR500 is at the upper end of hardness of what you can drill & tap with HSS...
by choprboy
Sun Oct 06, 2019 8:47 pm
Forum: General Discussion
Topic: Steel plate identification
Replies: 22
Views: 4439

Re: Steel plate identification

Edit: With a small coupon on the mill, HSS endmills will barely touch it, though carbide would chug thru. My insert facemill threw glowing orange hot chips everywhere. HSS drills immediately crapped out, a cobalt steel drill did the job but wasn't happy. I broke the first and second tooth (the tooth...
by choprboy
Sun Oct 06, 2019 7:55 pm
Forum: General Discussion
Topic: Steel plate identification
Replies: 22
Views: 4439

Steel plate identification

Anybody familiar with common steel plate grades and how hardened/AR responds to machining? I picked up a 2'x6' chunk of 1/2" steel plate from the scrap yard a while back to make plates for a transmission mount. There is usually a large supply of all different pieces, but little of it has original ma...
by choprboy
Tue Sep 24, 2019 3:30 am
Forum: General Discussion
Topic: Will a Bigger Compressor Make me Happy?
Replies: 31
Views: 6560

Re: Will a Bigger Compressor Make me Happy?

... It's a 5-HP Curtis (actually a Fu Sheng). When I got it, it was a dream come true, but it seems like it poops out with buffers and the DA sander. It's rated at 17.3 CFM. The next step up is about 7 CFM more... I wonder what others here are doing with their compressors. Is my experience typical?...
by choprboy
Sun Sep 22, 2019 3:21 am
Forum: Milling Machines
Topic: New guy with a new used mill lots of questions.
Replies: 21
Views: 4863

Re: New guy with a new used mill lots of questions.

I will try another picture... the first in the picture looks like a plumb bob. It has a hole in the end. (for a string?) The ones on the right are different diameters, and they have a dove tail cut in them. The middle one has a set screw. Yeah, looks like a plumb bob. The middle is possibly a borin...
by choprboy
Sat Sep 21, 2019 10:14 pm
Forum: Milling Machines
Topic: New guy with a new used mill lots of questions.
Replies: 21
Views: 4863

Re: New guy with a new used mill lots of questions.

As noted above, the first picture is of counterbores (along with possibly a couple annual cutters) with a quick change shank (I don't recognize it off hand, still looking). The second picture looks to be tool holders with either an Automotive Shank (aka Acme Shank) or an AXA Shank. Neither are very ...
by choprboy
Sat Sep 14, 2019 9:36 pm
Forum: Milling Machines
Topic: new to the forum! looking for Rockwell knowledge
Replies: 10
Views: 3131

Re: new to the forum! looking for Rockwell knowledge

There is generally a name plate on the front of the base plate and a logo plate on the front of the base cabinet. On the backside of the base plate is the model/serial number plate for the mill, which can be looked up to determine the manufacturer date. The serial number might also be stamped on eit...
by choprboy
Sat Sep 14, 2019 5:17 pm
Forum: Milling Machines
Topic: new to the forum! looking for Rockwell knowledge
Replies: 10
Views: 3131

Re: new to the forum! looking for Rockwell knowledge

Not sure what a Rockwell 66-530 is, haven't heard that designation before and a search doesn't bring up much. You picture is of a Rockwell 21-100 vertical mill. There are quite a few threads on the forum concerning the mill. Get a couple pickle jars and place them inside the base, one below the base...
by choprboy
Fri Sep 13, 2019 9:25 pm
Forum: General Discussion
Topic: Periscope films
Replies: 14
Views: 4507

Re: Periscope films

choprboy writes: Want a copy without paying Periscope? Just copy it off Youtube. You will not infringe any copyright by doing so. Well.. that is a bit more tricky... Because Periscope has slapped their logo and timestamp over the top, the Youtube video is now a derivative work and potentially (I th...
by choprboy
Fri Sep 13, 2019 5:53 pm
Forum: General Discussion
Topic: Periscope films
Replies: 14
Views: 4507

Re: Periscope films

Periscope is 100% absolutely not the owner. Periscope takes out of copyright videos from the Library of Congress archives (and other libraries), slaps their logo over the top, and then posts to Youtube with an ad to "license" a copy of the original from them. Countless pre-1976 films, which did not ...
by choprboy
Sun Sep 08, 2019 9:43 pm
Forum: Welding
Topic: Help identify this welder
Replies: 6
Views: 2054

Re: Help identify this welder

Yeah, I thought about Century, but the grey over black stripe is a very SnapOn look. Did Century actually make SnapOn's welders?
by choprboy
Sun Sep 08, 2019 1:57 pm
Forum: Welding
Topic: Help identify this welder
Replies: 6
Views: 2054

Re: Help identify this welder

Looks like a SnapOn YA2xx auto shop welder that someone has made a new front panel for. Maybe a YA204 or YA218/219.