Showing posts with label metal turning. Show all posts
Showing posts with label metal turning. Show all posts

Thursday, March 15, 2018

"Turning Metal On A Simple Lathe"

Many woodworkers who turn wood often have need to do the occasional metal turning such as facing a face plate or making or modifying a turning tool. For a woodturner focused on his craft, the higher cost of investing in a metal turning lathe is prohibitive.

Back in 1985 Lindsay Publications printed John Maloy's "Turning Metal On A Simple Lathe". By "Simple Lathe" he means a woodworking lathe. The concept is not new, it has been done since lathes first existed with mixed results. What John does here is clarify the procedure and provides info on producing the tools with modern materials and the methods of using them. He finishes off with an example of a model pipe T engine cylinder.

I have turned aluminum face plates and shafting on wood turning lathes. My Delta/Rockwell variable speed lathe came with a cross slide attachment and I have used it to turn the commutator on my tractor starter successfully. I have never tried it, but with care and John's instructions I don't see why steel can't be turned as well.

There are two main requirements The gravers, which John shows you how to make, and a speed reducer to get your lathe speed down to the 300 rpm range. Pictured below is Dave Gingery's plan for a lathe speed reducer from his book "The Metal Lathe". There are many different plans around the web for speed reducers but I do like Dave's plan.

If you want John Maloy's interesting little manual click Turning Metal On A Simple Lathe to download. 3 MB - pdf.

Click images to expand, click again for best view.

Most people are familiar with Dave Gingery's "Build Your Own Metal Working Shop From Scrap" series. Chapter 6 in book # 2 "The Metal Lathe" is a plan for the motor mount and speed reducer. I like this plan, it is easily built. A hack saw, portable drill, and vise is all that is needed and the offset lock and release is quick and easy to operate. It is easily mounted on other machines, where speed reduction is wanted.

Saturday, December 23, 2017

Text Book Of Metal Turning

Atlas, Logan, South Bend and many others have all written very good books on how to run a lathe. They of course feature their lathes and often accompanied a purchase of their lathe, serving as operating manuals.  This does not tarnish there usefulness in general lathe operations. Methods, operations, and tooling are generally transferable across different brands. South Bends "How To Run A Lathe" is a good example of one that has become very popular for general use. I have half a dozen different editions on disk and a couple paper editions on my shelves. I will upload one when I do my South Bend rebuild.

Hercus Machinery an Australian company built a 9" South Bend precision bench lathe nock-off that sold quite well. It was so close, that looking at the two lathes it looks like some parts can even be interchanged. Not to be outdone, they to put out a lathe operation book called "Text Book Of Metal Turning". It is chock full of good information, covering all the basic operations done in the lathe from turning between centers to taper turning and thread cutting. There are handy chapters on useful information, practical examples, and tables.

I have just made up a 47 page pdf of a Hercus rebuild that I found on the site. Charlie does a great job of rebuilding a rebuild that went wrong in an article titled "YOU SPENT $2000 ON WHAT???" here's the link:

To download "Text Book Of Metal Turning" go to my Books - Free Downloads page. # 40 - 3 MB - pdf