Steve Bedair's
9 x 20 Lathe Site
Longview , Texas
    11 -2010
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




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 Copyright 2002 Steve Bedair