Search found 5738 matches

by SteveM
Sun Sep 23, 2018 8:19 pm
Forum: Lathes
Topic: Look what followed me home today
Replies: 1
Views: 83

Look what followed me home today

I picked up a Pratt and Whitney 7" bench lathe today. IMG_0868.JPG Been looking for one to go alongside my mill for about 10 years. Mostly, I just find the 10" model which takes 5PN collets. Pretty complete, although it is missing the speedranger drive. Has the bed, headstock, drawbar, collets (miss...
by SteveM
Sun Sep 23, 2018 6:11 pm
Forum: General Discussion
Topic: Starrett #123 26" Vernier Caliper
Replies: 9
Views: 182

Re: Starrett #123 26" Vernier Caliper

Are you sure it measures 26"? The scale on a vernier is longer than the capacity, as there must be a place to the right of the jaws for the vernier scale. I suspect what you have is really a 24". That's exactly it - you can't use those extra 2" at the end, but they probably put them there so it did...
by SteveM
Fri Sep 21, 2018 2:03 pm
Forum: Milling Machines
Topic: Tightening a vise
Replies: 14
Views: 291

Re: Tightening a vise

Kurt, on their website, shows clamping forces given the torque applied to the handle. They say that, on the D688, with 80 ft-lb of torque on the handle, the vise is clamping with (GASP!) 7,342 pounds of force. https://www.kurtworkholding.com/manual-vise-opening-p-1205.html My guess is that if they a...
by SteveM
Fri Sep 21, 2018 1:57 pm
Forum: General Discussion
Topic: Gage blocks
Replies: 54
Views: 1679

Re: Gage blocks

This would get you close... https://www.ebay.com/itm/Van-Keuren-Light-Wave-Micrometer/111105462491?hash=item19de66d0db:g:tkUAAOxyPc5SB3P1 Van Keurens answer to the P&W Supermicrometer. How is one of those used (other than turning the large wheel). There seems to be a bunch of parts on it. What is t...
by SteveM
Fri Sep 21, 2018 1:51 pm
Forum: General Discussion
Topic: Why 27 TPI?
Replies: 9
Views: 299

Re: Why 27 TPI?

The 11" Sheldon is on the top of my list for lathes, as it has several advantages over a South Bend heavy 10 (more clearance and more travel), but I've only found one and it got away.

Steve
by SteveM
Fri Sep 21, 2018 10:48 am
Forum: Live Steam
Topic: WHO NEEDS CNC?
Replies: 34
Views: 1631

Re: WHO NEEDS CNC?

One of the things I think some miss in Dave's videos with his turret lathe is that the bulk of the time is not being used by things like switching tools and moving the stock in. All of that happens pretty quickly. Most of the time is the actual machining. The time to tap, chamfer, part, etc... are a...
by SteveM
Fri Sep 21, 2018 10:40 am
Forum: General Discussion
Topic: oilless compressors
Replies: 10
Views: 279

Re: oilless compressors

If anyone local to southwestern CT wants the quietest air compressor you have ever (never?) heard, I have a dental office compressor for sale. It's got a tank the size of a pancake compressor, and an insulated metal shroud over it. If you are standing next to it, you can carry on a conversation. My ...
by SteveM
Fri Sep 21, 2018 8:07 am
Forum: General Discussion
Topic: Why 27 TPI?
Replies: 9
Views: 299

Re: Why 27 TPI?

Our shop gang figured their lathes were set up for 24 tpi (no quick-change gear boxes then) so they just made everything 24 tpi! The thing is, with a standard American QC box, you CAN'T do 27tpi. My Atlas can't, nor can a South Bend. A chart for a South Bend change gear lathe shows that you can do ...
by SteveM
Thu Sep 20, 2018 9:05 pm
Forum: General Discussion
Topic: Why 27 TPI?
Replies: 9
Views: 299

Why 27 TPI?

I know that microphone stands have the odd pitch of 5/8x27. Never thought much of it and bought the tap so that I could make things to go on microphone stands. I'm sorting thru my dad's taps and there are quite a few other sizes of taps that are also 27 tpi. Is there any history to why there would b...
by SteveM
Thu Sep 20, 2018 9:02 pm
Forum: General Discussion
Topic: Gage blocks
Replies: 54
Views: 1679

Re: Gage blocks

That tool has a broad application. My first thought is to make one. If you make the wheel big enough, you could measure angstroms. I have one of those direct-reading tenths micrometer heads. I thought of making a bench mic out of it. I thought if I put a vernier on it, it would measure a tenth of a...
by SteveM
Wed Sep 19, 2018 7:24 am
Forum: Lathes
Topic: Jet 1224
Replies: 4
Views: 191

Re: Jet 1224

Thanks. Lots of information out there on it, now that I know where to look.

Steve
by SteveM
Tue Sep 18, 2018 9:12 pm
Forum: Lathes
Topic: Jet 1224
Replies: 4
Views: 191

Jet 1224

Anyone know anything about a Jet 1224?

Can't find anything on Tony Griffiths' or Keith Rucker's sites, probably because I don't know who actually made it.

Looks to be the same thing branded as Enco.

Steve