HSM Header

Machining a Flywheel

By John Schultz

 

The Stuart Major Beam engine calls for a 13-7/8” (finished) diameter flywheel. Of course, this was too big to swing on my 13” South Bend lathe.

I began by very carefully drilling a 1/2” hole in the center of the flywheel, using the drill press. I then mounted the flywheel on my 6” rotary table with some scrap plywood and used a No. 2 Morse taper arbor with a 1/2" extension to center it (Photo 1).

This setup was rotated around a sanding drum spun by a 1750 rpm motor mounted on an old shaper ram. The result was a very accurate diameter that required little finishing on an open gap 15” wood lathe.

After the periphery was machined, the hole was bored and reamed to 3/4” diameter on the
same wood lathe.

Additionally, the print called for a fancy hub on each side of the flywheel. So, using the same setup with the same rotary table, I used an inexpensive carbide wood router bit, again, spun by the same motor (Photo 2). Incredibly, the bit survived the operation and is still usable for woodworking!

 

Thanks John, your subscription has been extended by an issue!

 

Please do us a tremendous favor and forward this email on to your machining friends!

 

subscribe image
Do you have a tip you'd like to share with others in the metalworking hobby? If so, please contact us at daronklooster@villagepress.com

Village Press, Inc. Publications, 2779 Aero Park Dr., Traverse City, MI 49686
800-447-7367