The Metalshop
This program calculates the gear positions for cutting threads on the Mini Lathe. For each desired thread pitch it calculates all of the possible combinations and displays those that work within a reasonable error. Written by Al Harral on Bethel Island, CA.
Al added the additional 21T gear to the standard gear set. If you don't have the 21T gear, please ignore those setting which include it.
http://www.varmintal.com/alath.htm
The original was written in BASIC. It was converted to PHP by Vince Vielhaber.
Inch or Metric lead screw?
Inch
Metric
Currently available gears
1
20 Teeth
2
20 Teeth
3
30 Teeth
4
35 Teeth
5
40 Teeth
6
40 Teeth
7
45 Teeth
8
50 Teeth
9
55 Teeth
10
57 Teeth
11
60 Teeth
12
65 Teeth
13
80 Teeth
14
80 Teeth
Number of teeth on an
additional gear (0 for none)
Calculate Inch or Metric?
Inch
Metric
Desired TPI or MM Pitch
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