The Home Machinist!

I have no experience threading with metric leadscrew. I did look up some information in the Nardini lathe. I have the the Imperial version. I looked in the section that applied to the metric version and found there were 5 possible pinions that could be used on the thread chasing dial. One changed th...

A well driller I knew used 7" OD casing. He was able to buy random lengths with beveled ends cheaper than 6" sch. 40. I think the 7" casing is common in the oil patch.

Be careful what coating you order. Some coatings will cause ali to adhere to the cutter. I use uncoated carbide with polished flutes.

Roll cages are usually made from 4130 alloy tubing. The tubing is not heat treated but has gained strength due to work hardening in the cold drawing process. Having been through a fire its properties are near the annealed state, the strengthening due to work hardening is lost. Similarly the low carb...

Have any of you PolyChoke owners found a manual for it? I have one but haven't used it because of the time it would take to figure out how to use it properly.

Measure the voltage between the work lead and the stylus. Then you can make a decision about safety.

Mayhew and Dasco make good tools. I would probably go with HF pry bars because of price and warranty.

I lift my machines with a pinch bar and blocks until I can get my toe-lift jack under it.

Put the machine on blocks tall enough the legs of the hoist will clear.

Make the extension considerably oversized and the need for accurate alignment goes away. Definitely use a V groove.

There are a number of designs for retracting tool holders you can find on the web. I have been wanting to scale up George H Thomas' design to use on a larger lathe. I believe it was in the 60s Snap Tap made a retracting threading holder that used a trip rod to release the tool. One end of the rod wa...

The hoe cutters should do well provided you can pilot them on the existing bore. As NP317 sail rigid support is essential.