03-07-2012, 12:47 PM
03-07-2012, 07:10 PM
I don't recall ever seeing a #10 with 28 tpi. Shouldn't the most common pitches for #10 be 24 and 32?
03-08-2012, 05:53 AM
You were right, I changed it. Thanks.
Originally Posted by cameron
It was easy to change. I have it in a Word document.
I can email a copy to anyone who wants one.
03-09-2012, 03:00 AM
Maybe the Guy is using what he has, I agree, when measuring metric stuff like bolts a cheap digital calipers are very good. The system you know is always going to be the best!
Originally Posted by loply
03-09-2012, 06:33 AM
I am being forced to learn both systems every day...
03-12-2012, 05:25 PM
Wow, some things never change! I'm a '75 grad from machine shop technology at the old VoTech school on Winbourne Av. in Baton Rouge. I made the same hammer, which I still have. My instructor was John M. Jones. He designed the hammer project in 1960. It was copied and used in many machine shop schools. Interesting that they are still using those projects but after thinking about it, probably still using the same curriculum.
Originally Posted by H380
BTW, my final project before graduation was the dreaded pentagonal dodecahedron. I was working after school in a machine shop by that time so I took some aluminum stock to work and knocked it out one night on the clock while I was supposed to be threading valve stems.....lol.
Last edited by martym; 03-12-2012 at 05:29 PM.
03-14-2012, 08:05 PM
To: Sir Earl ...
Sir John, Earl of Bridgeport & Sudspumpwater. MBE
[ Motor Bike Engineer ] Nottingham England.
Hey ... He must know ROBIN HOOD!
03-15-2012, 08:00 PM
New Iberia here. Yes the project book was last revised in 1978. Still has both pecan crackers.
Originally Posted by martym
03-15-2012, 11:38 PM
...aaaaand back to shop made tools!
These are rough and ugly, but I made some boring bar holders for my 7x10 mini-lathe. I have chosen not to convert to a QCTP and instead have several 4-way turrets I can swap in and out for semi-quick tool changes. So, I needed a way to hold round tools.
The turret will just accommodate 5/8" square stock, so I clamped a 5/8" 1018 steel blank in the toolpost and used a center drill in the 3-jaw to make a small hole that's perfectly on-center as far as height goes. I also dialed the cross-slide so the periphery of the finished hole would be 1/16" inch away from the edge of the stock.
Then I moved the stock to the 4-jaw, and using a mill centerfinder in the tailstock and the hole I just centerdrilled, I dialed the piece in. This one was the 1/4" holder:
After drilling through, I then cut a slot on the thick side of the stock. I started a shallow groove with a hacksaw and then did most of the work with a recip saw (no mill here). Here are 1/4", 3/8", and 1/2" holders. The 1/2" uses the full width of the 4-way turret, blocking two tool positions, but the smaller ones just occupy one tool position (well, they will once I cut those HSS bits in half!).
Here's one clamped in my tool post:
03-16-2012, 12:16 AM
Necessity is the mother of invention, nicely done.
Bill in SE Idaho