Thread angles for different screws

Hi, all:

does anybody know any good reference book where I can find thread as well as helix angles for different types of screws?

Thank you,

Edgar Lobachevskiy PHYS DEPT UNIV HAWAII

Reply to
Edgar Lobachevskiy
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"Machinery's Handbook"

Ned Simmons

Reply to
Ned Simmons

The helix angle is easy. If you know the diameter and the number of threads per inch you can calculate the helix angle with simple geometry.

The reciprocal of the threads-per-inch is the lead. The pitch diameter multiplied by pi is the circumference of one thread. Unwind one turn of thread and you have a triangle with the adjacent side equal to the circumference and the opposite side equal to the lead of the screw. You do the math.

Don Kansas City

Reply to
Don A. Gilmore

Google gets over 4 million hits on "thread form" and the first few have the sort of thing you are asking.

Reply to
John G

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