Showing posts with label metalworking. Show all posts
Showing posts with label metalworking. Show all posts

Wednesday, May 16, 2018

An Indicator, A Vise And A few Quickies

So back to the metalworking shop here is a plan for a nice clamp-on model maker's vise, a cleaned up and clearer scan of a test indicator for the lathe and around the shop. There is another method for cutting keyways in the lathe and a quick little jig for drilling round work.




Keyways are a characteristic common to most shaft, motor, and pulley assemblies in shop built machines of wood or metal construction. Just set screws can come loose and score shafts, keyways and set screws are a better way to go. Above is another idea for cutting keyways in the lathe. If you have a compound slide or have built one from the couple of plans I have posted, you can cut keyways using the above idea in the wood lathe as well. Don't try to hog it off in one pass, feed slowly taking a number of passes to reach the depth required.

If you use this method use a high power low speed drill, like the one below. I purchased this one shortly after "Mastercraft" came out with it. I liked it so much I bought a second one. Lots of power, it draws 7 amps, and the reversible variable speed runs 0-650 rpm. I work them as hard as my Makitas and so far they are holding up well.



Tuesday, May 15, 2018

A Few Easy Metal Lathe Accessories

So here are a few easy lathe accessories for the novice, looking to inexpensively equip his small metal turning lathe and gain some experience at the same time.




Knurling In the Lathe

Here,s an informative article on knurling in the lathe. Knurling gives otherwise bland looking equipment some class. In addition to its decorative qualities it is an efficient method of providing good grip for tools like punches and adjustment handles and knobs. Once you are aware of the methods used to produce good knurls the process is relatively easy.





Sunday, May 13, 2018

Taps And Dies And A Tapping Machine

So I recently acquired a couple more original PM Shop Notes. The guy saw me coming, he wouldn't go below $10 each, for well used magazines that originally sold for $1.25. Ha ha, what are you gonna do?

So lots of good stuff in the Winter 1954 PM Shop Notes. I have uploaded some of these projects before, including the tapping fixture below, but the resolutions were poor because they came from a Google scan. I am scanning lots of the stuff in this one, with better resolution and cleaned up much better.

Below is the cover, that neat tapping fixture, and a very nice article on threading with taps and dies. The tap and drill size tables are the most informative I have seen, and very usable compared to the eye straining tables you get with tap and die sets. Printing off a set on laminated paper, for my shop wall, is a must. How tight do you want your threads? These tables give different drill sizes for less than full threads.

As usual click to expand and click again for best view. 









Enjoy cheers.


Tuesday, May 8, 2018

Early PM Shop Notes Files Preview

So as mentioned before I am working on some early (pre 1930) PM shop notes files in my spare time. For example J. V. Romig, the D. Gingery of his time ( maybe that should be stated the other way around since Romig came first) produced a large number of small hobby shop sized machine plans for publication in Popular Mechanics and Popular Science from 1921 to 1925. That file is now over 75 pages of some of the more interesting plans he produced.

There is another file of short plans and ideas from these early shop notes that I am working on. These all come from the 26 volumes of early shop notes reprinted by Algrove Publishing. Here is a preview of a few short articles from this file.

The first one deals with heat treatment, hardening, and annealing. It is not a well known fact but when heat treatable steel reaches the right temp for hardening it looses it's magnetic qualities. A metal worker who does heat treatment all the time can easily judge by color but someone who only does it occasionally will find this tool very helpful.


This short article is an interesting method of casting brass worm gears. The second article is another plan for cutting circular work. There are lots of plans for this type of fly cutter, I have posted a few. For very thin sheet metal this is probably a better idea since it incorporates a shearing action with less chance of grabbing and damaging the work.


In addition to the many plans Mr. Romig authored, he also produced many articles for publication in the "Popular" magazines of the day. Here is one on making "no casting" machine slides for the hobbyist who would rather avoid setting up a small foundry.
  


Wednesday, January 31, 2018

Pictorial Textbook Of Engineering Part 3

So hopefully there is interest in this fine volume of metalworking information. Here are the next 5 chapters, starting with, safety in the use of tooling then moving to the principles of tooling and then planning for tooling. Next we move to the shaping to rough sizes section. Covered first is foundry work, this is followed by a chapter on shaping by forging.

For those following this posting check back next week for Part 4 and the next set of chapters.

To download click Pictorial Textbook Of Engineering Part 3 - 8 MB - pdf




Wednesday, January 24, 2018

Pictorial Textbook Of Engineering Part 2

So hopefully the first part of "Pictorial Textbook Of Engineering" found some interest. For those interested here is part two. This part covers the next four chapters starting with hardening and tempering of metals, moves to testing for properties and then covers protection and coloring of metals. Chapter 7 introduces the fabrication of a lathe to illustrate purpose and standards of tooling.

As mentioned before this is as good basic information for the hobby metalworker as you will find anywhere, in a easy format.

To download click "Pictorial Textbook Of Engineering" Part 2. 6 MB - pdf





Wednesday, January 17, 2018

Pictorial Textbook Of Engineering Part 1

So to replace the PMSN installments I have a good number of old but not to old books that might find some interest here. Scanning, cleaning up, and packaging a book is very time consuming, so I will package the larger books in installments of 40-50 pages to make it easier to upload.

"Pictorial Textbook Of Engineering" is the textbook I wish I had when I took shops in high school. I mostly remember them as goofing off periods, and the instructors didn't seem to care. An outline involving this text might have changed that. You will find excellent info on the engineering metals, their properties and how to work them, you will find info on all the methods of working metals, take you through the production of a lathe, and covers the tools you will use, all clearly illustrated. Even the section "Chemistry For Craftsmen" is well illustrated to make some deeper concepts easy to grasp.

This vol. is 303 pages, so it will take 7 installments to upload the whole book. The quality is not perfect but better than many I have seen.

So to download the first 3 chapters click Pictorial Textbook Of Engineering Part I - 7 MB - pdf