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MachinistBlog.com

Plans, projects and how-to's for home machinists

Jan Ridders’ Flame Eater “Marc”

Jan Ridders recently updated his plans for a vertical flame eater engine that he originally made in 2003 as a birthday present for his son Marc.  He made a number of improvements and redrew the plans using a CAD program.  Jan says this engine is “more forceful and noisy” than his Stirling engine models.

This is just one of about two dozen beautiful engines Jan has designed.  You can see them all by visiting his web site, which is in both English and Dutch (look for the buttons to change the language).   Jan gives his plans away for free, although he will accept a donation if you’d like to make one.  You just have to send him an email telling him which plans you would like.  You can contact him via his web site.

David Morrow’s Web Site

If you would like to see some cool projects made with a small CNC mill then take a look at David Morrow’s web site.  It may inspire you to try CNC or give you some new ideas if you already have.  You’ll find an eclectic collection of clocks, hot air engines and motorcycle and car accessories.  His work shows how CAD and CNC can let you be more creative and quickly design and make things that just wouldn’t be practical with manually operated machines.

David made them on a Sherline mill that he converted to CNC.  He doesn’t say much about the conversion, but he does provide details about some other modifications that can greatly increase the capabilities of a Sherline manual or CNC mill.  They include an extra long and heavy base, an extended column and a flood coolant system.

If you’re interested in plans then check out Gary’s Clock 2003.  You can download the DXF file for it and David’s very detailed construction and assembly manuals for it.

Plans: Laundry Drying Rack

I know, you would probably rather make something more interesting than a laundry rack.  But have you ever considered that someone you know might want one?  That it might be someone you should show some gratitude to for all the time they let you spend in your workshop and all the money they let you spend on tooling?  Have you considered that Mother’s Day is coming soon and someone might like a drying rack with some nice new jewelry hanging from it?  Did you know the free plans will show you a way to fasten together tubing that might be useful for other projects?

This drying rack folds flat for hanging on a wall and was designed by the talented Ralph Patterson.  Here’s how it came to be and some construction notes:

“This project was inspired by a Honey-Do directive that came from a mail order catalog.  They offered a rack 60 inches tall by 18 inches wide that had a painted finish.  Naturally, we were too cheap to spend $25 plus postage for something that simple.  So, a trip to the metal store yielded three 12-foot lengths of aluminum extruded tube, plus a foot of 3/4-inch round bar.  At $15 each for the tubes, economy was no longer a factor.  The purchased bits and pieces made the total for materials something over $60.  I should have used EMT conduit, but no one seems to offer any pre-made tips or caps for that size.

It would have been possible to turn some aluminum plugs to be a press fit into the tube-ends, to accept a bolt that would hold the corners of the rack parts together.  But, being engineering-oriented, a two-part cup and wedge was designed instead.  The wedge taper angle of 5 degrees would be self-locking and should hold tightly in the open end of a tube segment.  So far, nothing has become loose in use.

After a few hours of effort, the tube insert parts were completed.  Then an existing boring bar that holds a carbide insert was adapted to cut the radius needed in the cross-tube ends, so that the horizontal parts would fit snugly against the vertical parts.  The boring bar was inserted in a collet in the mill spindle for cutting the scallops.  The tubes, cut to length, were held in the milling vise horizontally and the cutter advanced from above.  Several steps were needed to cut to full depth, since only a small part of the cutter extended past the side of the boring bar.  Much care is needed to cut the opposite ends of the tube cutouts, since both ends must be kept exactly parallel.

The long tubes each needed 3 holes drilled along the length, and these must also be kept parallel.  A length of steel angle was used to hold the tubing for mounting in the milling vise so that the holes could be place on the proper axis.

After the holes were complete, the assembly went together with no hitches, and is serving the wish very well.”

Click Here to Download Ralph’s Plans (PDF) Continue reading Plans: Laundry Drying Rack

Plans: HMEM’s EZ Build Engine

You won’t need a mill to make this nice looking steam engine that was designed to be an easy-to-make project to teach basic machining skills to beginners.   The free plans come in both US and metric versions and they include 24 pages of helpful instructions.

It was designed by members of the Home Model Engine Machinist (HMEM) forum, led by “black85vette,” who proposed designing a very basic and easy-to-build engine that could be built by someone without a lot of experience or tooling.  What they came up with is an engine that uses tooling you probably already have or you’re going to need someday:

  • Lathe with a 3-jaw chuck
  • Parting tool
  • Hacksaw or band saw
  • 4-40 tap
  • 1/4-inch reamer
  • 1/2-inch reamer
  • Some drill bits
  • A drill press

You’ll also need some measuring/lay-out tools, a marker or lay-out dye, a center punch, vise and some files.  And a live center if you decide to make the flywheel from flat stock using the “special” technique.

The engine was also designed to be inexpensive to build and use materials and fasteners that are easy to obtain and easy to machine.

  • 1/4 x 2 x 10-inch aluminum flat bar
  • 3/4 square x 4-inch aluminum bar
  • 5/8 diameter x 2-inch brass rod
  • 1/2 diameter x  2-inch brass rod (you can use 5/8-inch brass rod and turn its diameter down)
  • 1/4 diameter x 4-inch rod in mild steel or brass
  • 1/4 x 1/16″x 6-inch flat brass
  • (15) 4-40 screws x 1-inch long (some of these will be cut to length)
  • You’ll also need aluminum or brass to make a 3-inch flywheel.  You can either use a 1/4-inch thick disk cut from 3-inch round stock or make it from a piece of 1/4-inch thick flat stock that’s at least 3-inches wide.  You’ll use an interesting technique if you make it from flat stock.  It is described in the instructions and I’ve also written about it.

You could also use steel for the flywheel but you’ll need a little experience to machine it.  One of the group’s objectives was to use materials that are easy to machine which is probably why it wasn’t listed as option.

The 24-page construction manual is well written, profusely illustrated and provides step-by-step instructions with lots of helpful tips for a beginning machinist.

Download the Plans

  • From HMEM (There are two versions.  You want this one, the “13Nov09” update.)

Random Quote

Nothing gives one person so much advantage over another as to remain always cool and unruffled under all circumstances.

— Thomas Jefferson