Bob Porter's Booklet Series

How to Make Tiny Drills

by Robert Porter

"...After making this type of drill by hand the hard way for over 40 years to repair and restore antique clocks and watches, I've developed a simple method to make tiny (down to 0.004" diameter so far) drills quickly, easily and accurately."

You get a brief, nicely illustrated booklet that will show you how to make tiny spade drills from high speed steel and tungsten carbide. Here's the straight dope from someone who knows what he's talking about. Good stuff... 5 1/2 x 8 1/2 booklet 16 pages

No. 1409 ... $5.95

How to Make a Tool Grinding Attachment
for the Watchmaker's Lathe for Making Gear Cutters and the Like

by Robert Porter

"This guide offers a simple solution to the complex problem of generating a very precise radius and clearance angle on a lathe tool bit to be used to form the profile of gear cutters and the like. While this attachment is designed for use on the watchmaker's lathe, it can easily be adapted to larger lathes.

Although this guide does not get into gear design, it does show you how the form tool can be used to make three different types of contant profile gear cutters - an arbor mounted multi-tooth cutter, a collet held multi-tooth cutter, and a fly cutter - all of which can be made with only a right hand form tool."

Porter is a clockmaker, so his lathe and his tools are small. But the results are very big. This small, brief, but heavily illustrated booklet will show you how to build the attachment. One photo shows him cutting teeth in a gear cutter, and in the next, using that cutter to make a six leaf clock pinion. It's all about making tools.

Great solid info from someone who has done it. From the guy who gave us "Tiny Drills". Consider this carefully. 5-1/2 x 8-1/2 booklet 20 pages

No. 1522 ... $6.95