Friday, September 24, 2010

A Few Links

Here are a few Taig and Machining related links:

Thursday, September 23, 2010

Steve Fornelius’ Steady Rest

Steve Fornelius says, "I needed a following rest for my lathe and after a basically fruitless search, I decided to heavily modify on by JR Bentley.
I had to make it simple, because I don't have a mill to make anything fancy! If you can tell me how to post to your site, I'll submit there.
Anyway, here's the gist of the project:
One piece 3/4" x 1/2" four inches long for the base
One piece 3/4" x 1/2" fly cut to 1/2" x 1/2" x 3 inches long for the crosspiece
Two pieces 3/4" x 1/2" fly cut to 1/2" x 1/2" x 2 inches long for the upright and guide support
Two pieces of 1/4" brass rod for guides
Five 3/4 inch 10-32 socket head cap screws
Simple drilling, tapping and counterboring for the cap head screws. I found I could use my Delta 9" bandsaw to cut the metal, so I saved a lot of hacksawing!

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Wednesday, September 22, 2010

John Silvia’s Quick Change Tool Post


This is my version of the quick change tool post by E. Paul Alciatore III as published in the Feburary/March 2010 Machinist's Workshop magazine. I modified his design to hold 1/4" tools and to fit the taig. Instead of using steel for the tool holders, I substituted aluminum. I figured if it was strong enough for the original tool holder it would be fine for this one. As long as I was using aluminum I thought it would be fun to try anodizing, hence the red color.
I made the tool post out of 3/4" drill rod. I also used a piece of the drill rod to make a D-reamer to size the hole in the holders. On the bottom of the post I milled flats to match a 5/8" square hole in the mounting plate. The mounting plate was made of 1/4" steel. Mounting the post to the plate made it easy to mill the large flat on the post at 45 degrees. The large flat is 5/8" from the other side. The combination of mounting plate and post can be mounted on either the left or right side of the taig cross slide and, because of the square hole, it can oriented to cut on the left or right. The base of the post does not come all the way through. When tightened down with the two bolts, believe me, this post is going nowhere! Of course, by using only the bolt through the post it can be used at any angle.
The tool holders are 1 3/4" on a side and 1 1/16" thick. When cutting the corner off the tool holder the side with the fixed bolts needs to be flush with the D-post. The other side is milled 2-3 thousands deeper to allow tightening. I'm ashamed of the knobs, but at $2.50 for 10, they were too cheap to pass up and are easily strong enough.
Mr Alciatore came up with a great design! It is easy and cheap to make. It took me about 1 day to make the first tool holder, but less than two days to make the next 9. It is a lot easier to do them in batches.

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Sunday, September 12, 2010

A Plumbing Adapter

The faucet for our water filter broke and the new one had different plumbing than the old one. Rather than redo all the connections I made an adapter to go from the faucet (7/16”-24 UNF for a 1/4” compression fitting) to the tubing (3/8” compression fitting)


A piece of “medical grade” Pomalux Acetal Copolymer.


Center drilling


Drilling for the tap.


Tapping (under hand power…)


Drilling the rest of the way through 1/4”


Flipped in the chuck and turned down to 3/8” diameter for the compression fitting.


Milling a hex so I can get a wrench on it.


The finished adapter.


In place under the sink.


The new faucet on the sink. The picture makes me think I need to tear apart the whole kitchen counter.

Anyway, no need to drive to the hardware store, although I was lucky (or a good hoarder) to have the 7/16”-24 tpi tap on hand. It isn’t common.