COMPARISON OF SPECIFICATIONS
Self-Tailing Winches
Calculated Power Ratios
Power Ratio = ( 2 * length of handle * gear ratio ) / diameter of drum
For manufacturer's power ratios see following Specs worksheets
Anderson (S/S) Mfg. Stated Power Ratio
Function Model 1st Power Ratio 2nd Power Ratio   1st Gear Ratio 2nd Gear Ratio   D B H 1st Power Ratio 2nd Power Ratio
Primary 52ST        16.26          53.34              3.2          10.5   3 15/16 7 14/16 8 14/16        16.2        52.0
Secondary 40ST          8.69          40.11              1.3            6.0   3      6      6 12/16          8.5        39.5
Trim 28ST          9.43          26.85              1.3            3.7   2 12/16 4 15/16 6               9.5        26.5
Harken Chrome Mfg. Stated Power Ratio
Model Model 1st Power Ratio 2nd Power Ratio 3rd Power Ratio 1st Gear Ratio 2nd Gear Ratio 3rd Gear Ratio* D B H 1st Power Ratio 2nd Power Ratio
Primary B56.3STC        21.05          54.74            9.26            5.0          13.0            2.2 4 12/16 8 14/16 10 10/16        21.0        56.0
Secondary B40.2STC        14.67          40.00 #N/A            2.2            6.0 #N/A 3      5 14/16 6 15/16        13.5        40.0
Trim B32.2STC        16.34          32.00 #N/A            2.4            4.7 #N/A 2 15/16 5  6/16 6  7/16        16.0        32.0
Lewmar Chrome Mfg. Stated Power Ratio
Model Model 1st Power Ratio 2nd Power Ratio   1st Gear Ratio 2nd Gear Ratio   D B H 1st Power Ratio 2nd Power Ratio
Primary 54CST        13.58          54.30              2.8          11.2   4  2/16 8  1/16 9 14/16        13.8        54.0
Secondary 40CST        13.10          40.00              1.9            5.8   2 14/16 5 13/16 6 13/16        13.2        40.2
Trim 30CST        13.62          28.60              2.0            4.2   2 15/16 5  7/16 6  5/16        13.8        29.2
* "3rd Power Ratio" actually refers to the LOWEST power ratio.  Only Harken has 3-speed winchs.
Spreadsheet written by Jeff Stander, KP44 Beatrix.