Recent content by James A. Lee

I have a complete set of iron castings for the "Duplex" Hacksaw. Purchased from England. This is a small unit which utilizes 12" hblades. Nice for a crowded shop. Offers. Jim ([email protected])

I'm offering my DuMore Series 11 Grinder For Sale. This is an unusually good one, in VG to VG+ condition. Complete in its original steel box in like condition, with spare wheels (new), two bottles of DuMore lubricant, wrenches. Has had very little use, I haven't used it for 7 years. In perfect...

This one has the look of a Schillings design...wahr oder nicht? Alles ist sehr schoen!! James

Meant to add, Dave, that one small downside to this is that Hall uses the metric system throughout,you just have to convert. His tools will cover most of the sharpening that goes on in an amateur shop. His other books on lathe and mill are also well worth the cost, all directed at the less...

I was about to recommend Hall's book just now, when I noticed someone already has. Great little book, "Tool and Cutter Sharpening" in the Workshop Practice Series, No. 38. A goldmine of info at a small cost. He starts with a simple no frills rest and takes it through a pretty fancy one. I was...

Thank you all for helping me to understand this material better. And George, your point is well taken...it's easy to forget that splitting hairs in the making of these small cams is not as important as it may seem. Thanks again, Jim

Thanks for your great input, guys! I think I have it pretty much under my belt now. Though I did pick up somewhere that the flanks can be drawn as tangent arcs by extending the lobe centers outward and along those lines scribing the flank curves using the base circle diameter as the radius...

Dear George and Bogs; Aha! That would seem to clear up much of the fog here....but I read also that several people have used a flat piece of delrin as a flat follower (to avoid stylus bounce) with no mention of having to change the master made as as a scaled up lobe. Hmm... Making the master as...

I hope some knowledgeable soul out there can clear this one up for me...I've researched this for months until I'm crosseyed and blue in the face and still have no definitive answer. How in H*** do you go about making a master cam?? Gene Switzer in his design for a grinder glosses over the...

I have a question regarding setting up work in the milling vise to ensure drilling and/or milling angled engine ports to very close limits, using a dial indicator. and some simple trig. I asked this question of one of the frequent contributors to this forum and got no response, so I guess this...