Pulses per revolution

Nominal
gear ratio

Real gear ratio

Pulses per
revolution

Gear unit backlash in degrees

67

67.22Infinite gear unit ratio (67.22 = 67 2/9, 18.33 = 18 1/3)

2009

4.8

45

45.00

1350

5.1

33

32.94

988

5.1

27

27.00

810

5.1

18

18.331)

549

4.5

15

15.00

450

4.7

11

10.98

329

4.7

9

9.00

270

4.7