Gearbox and Transmission Engineering Tools

Ratio Combinations

Procedures For Selecting Ratio Combinations

Model E3:
2 Speeds - Select any two ratios shown.
3 Speeds -

  1. Select highest speed desired (least reduction or most increase).
  2. Skip next three slower speeds.
  3. Select two more speeds from any of the remaining slower speeds.

Models 2M, 5M, 10M, 20M, 30M and 50M:
2 Speeds - Select any two ratios on the same horizontal or vertical line.
3 Speeds -

  1. Follow the procedures listed above for a 3-speed unit.
  2. Select three ratios in same three vertical columns on any other single horizontal line. (Changing the first three ratios selected can provide numerous alternatives in overall ratio combinations .)
4 Speeds - Select any four ratios which form a square or rectangle on the shreet.
OR
6 Speeds -
  1. Follow the procedures listed above for a 3-speed unit.
  2. Select three ratios in same three vertical columns on any other single horizontal line. (Changing the first three ratios selected can provide numerous alternatives in overall ratio combinations .)

9 Speeds - Refer to factory.

Models 3M, 6M, and 11 M Extended ratio units
Refer to factory.

Model 60M:
Ratios for the 60M Model are the same as the 50M. However, the model 60M is available only in 2 and 4 Speeds.

We are always available to assist with
ratio selection and drive sizing.