9 X 20 Threading Chart

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9 x 20 Threading Chart
Harbor Freight 9 x 20 Lathe

Here is the same Threading Chart in Microsoft Excel ( easier to print )
9x20ThreadChart.xls



Important: Inch threads the 127 tooth gear drives change gear B.
Metric threads the 120 tooth gear drives change gear B.






Here's a chart from Jack Pantry. (Thanks Jack)

This chart shows all the possible combinations




Change Stacked Stacked Change Lever Lever Lever Lever Lever Lever Lever Lever Lever
Gear A Gear A Gear B Gear B Position 1 Position 2 Position 3 Position 4 Position 5 Position 6 Position 7 Position 8 Position 9
28 127 120 60 0.7 0.4
30 127 120 60 0.75 0.6 0.5
36 127 120 60 0.9 0.8 0.6
28 127 120 42 1 0.8
30 127 120 45 1 0.8
42 127 120 60 0.7 0.6
45 127 120 60 1 0.9 0.75
36 127 120 45 0.8
30 127 120 36 1.25 1
28 127 120 30 0.8
42 127 120 45 0.8
30 127 120 30 1.5 1
42 127 120 36 1.75 1
45 127 120 36 1.5 1.25
60 127 120 45 2
42 127 120 28 2 1.5
45 127 120 30 2 1.5
60 127 120 36 2.5 2
60 127 120 30 3 2


Click here to download & print Jack Pantry's chart:
PDF file
Excel spreadsheet