Metric Solutions

Since this is an inch lathe, none of the solutions are completely accurate for millimeter pitches, however, many of them will be close enough (depending upon the intended purpose).

gear order is from spindle to leadscrew
":" indicates the gears revolve on the same axis
"-" indicates the gears are meshed

Desired Pitch (mm) Actual Pitch (mm) Pitch Error Configuration
0.100.12323.47%80:30-90:35-100
0.200.2000.22%66:35-75:30-90
0.300.3000.05%100:68-72:30-80
0.400.4000.04%90:70-72:35-80
0.500.5000.05%48:30-100:68-72
0.600.6000.04%48:35-100:70-72
0.700.7000.01%48:50-72:40-70
0.800.8000.04%40:35-90:70-72
0.900.9000.01%70:75-72:50-70
1.001.0000.04%72:70-48:35-60
1.101.1000.04%66:70-35:30-70
1.201.2000.04%30:35-80:70-72
1.301.3000.04%75:72-60:48-50
1.401.3990.05%72:70-80:68-50
1.501.5010.04%72:70-80:70-48
1.601.6010.04%72:70-80:70-45
1.701.7010.05%70:75-50:45-48
1.801.7990.05%40:45-75:68-48
1.901.9010.04%70:75-70:66-45
2.001.9990.05%70:70-72:68-40
2.102.1010.05%68:72-48:45-40
2.202.1990.04%66:60-68-35
2.302.3090.40%66:72-70:70-40
2.402.3990.05%72-30:68-80
2.502.4920.31%66:68-50-35
2.602.5940.23%66-68:100-48
2.702.7090.35%60-50:72-45
2.802.8010.05%60-68:90-40
2.902.9030.10%70-50:60-35
3.002.9990.05%66-48:68-40
3.103.1040.14%60:66-68-30
3.203.1990.05%66-60:68-30
3.303.2990.04%60-66:90-35
3.403.3870.39%72-35:70-50
3.503.4830.47%60-50:72-35
3.603.6290.79%80-30:45-35
3.703.7250.68%70-50:66-30
3.803.8100.26%75-50:90-40
3.903.8810.50%68-48:66-30
4.003.9980.05%66-48:68-30
4.104.1120.30%66-40:68-35
4.204.2330.79%70-40:60-30
4.304.3010.01%70-45:80-35
4.404.4100.22%70-48:75-30
4.504.5160.35%66-45:72-30
4.604.6571.23%70-30:66-40
4.704.7040.08%70-48:80-30
4.804.7980.05%72-30:68-40
4.904.9390.79%75-30:70-40
5.005.0170.35%70-45:80-30
5.105.0800.39%100-30:72-40
5.205.2921.76%70-40:75-30
5.305.2920.16%100-30:75-40
5.405.3760.45%90-45:100-35
5.505.4830.31%72-35:68-30
5.605.6440.79%70-35:70-30
5.705.6440.97%72-35:70-30
5.805.8060.10%75-35:72-30
5.905.8800.35%90-48:100-30
6.006.0480.79%80-35:75-30
6.106.0480.86%100-35:75-30
6.206.2721.15%90-45:100-30
6.306.2720.45%90-45:100-30
6.406.3500.78%100-30:90-40
6.506.4510.76%100-35:80-30
6.606.4512.26%100-35:80-30
6.706.4513.72%100-35:80-30
6.806.4515.14%100-35:80-30
6.907.2575.18%100-35:90-30
7.007.2573.67%100-35:90-30
7.107.2572.21%100-35:90-30
7.207.2570.79%100-35:90-30
7.307.2570.59%100-35:90-30
7.407.2571.93%100-35:90-30
7.507.2573.24%100-35:90-30