Table 2 Geometry and working parameters of the example of spiral bevel gear pair.

Number of teeth

27

35

Module (mm)

5.27

Outer pitch diameter (mm)

142.29

184.45

Face width (mm)

36.5

Pitch angle (°)

37° 39′

52° 21′

Face angle (°)

40° 7′

54° 38′

Root angle (°)

35° 22′

49° 15′

Outer cone distance (mm)

116.48

Pressure angle at normal section (°)

20

Mean helix angle (°)

40

Shaft angle (°)

90

Hand of spiral

Left hand

Right hand

ISO quality grade

4

4

Precision machining

Grinding

Grinding

Material

18CrNi4WA

18CrNi4WA

Surface hardness

HRC60

HRC60

Surface roughness(\({\mu m}\))

Ra0.4

Ra0.4

Rotating speed(rpm)

6000

Torque(Nm)

339