Screw thread handbook

Merlin,

I also used my copy of Screw Threads and twist Drill until it fell apart at the seams.

I now use "Drills, Taps and Dies" by Tubal Cain Workshop Practice Series No.12

I like this as just like the earlier book it offers a range of tapping sizes (% engagement) so the appropriate size can be used to suit the application. The problem with most standard tables the tapping size is a compromise OK for general engineering but may not be for some model engineering applications.

Lambton

Hi John

Miserable foggy day here - no motivation to do anything so I got to browse a few "Threads" ( no pun intended) and came across your advice :-

"The ultimate book is Guide to World Screw threads."

Now I may just put that on my list for Santa - It sounds like an excellent cure for insomnia!

Cheers

Norman

All the main British firms like Dormer, Moore & Wright and Presto used to produce excellent little reference books and wallcharts full of threading information, as handouts. They may still produce them I got mine as a student for free. Many years ago the Model Engineer magazine gave some excellent separate charts on threading, giving a choice of depth of thread, related to available drill sizes, and I have always used these. They also repeated this later, with the same charts but with a larger format, but they would not be in the magazine. Maybe they can be dug out and re-published with a gentle request to he editor.

There are some queer anomolies in the Metric Coarse/ Fine series. Some fine threads come in a choice of two or three pitches for some sizes, and some of these choices for Fine are actually coarser then the corresponding Coarse size.

Clive;

My wage is as a scientist/R&D engineer.

I think you are confusing "understanding numbers" and metric/imperial. Not a lot of people "see" numbers, especially in this age of computers and cash registers that tell what change to give (for those of us still carrying cash!)

Another JohnS

Edited By John Alexander Stewart on 19/12/2012 18:50:50

I got a copy of The Presto book a few years ago and agree it is very useful.

It seems to be downloadable as a pdf. and is called Counsellor. It is on

http://www.presto-tools.co.uk/counsellor.pdf.

A call to their office might get you a hard copy.

Bob D

Robert;

That presto tools pdf file is a great read - thank you for posting the url to it.

Another JohnS