Table 4 Parameters of ring-shaped flexspline

Gear modulus m (mm)

–

0.375

Number of tooth z

–

160

Face width b (mm)

–

10

Tooth profile angle at pitch circle α (°)

–

10

Full tooth depth coefficient h_n^*

h_n/m

2

Dedendum height coefficient h_f^*

h_f/m

1.35

Dedendum arc radius coefficient r_i^*

r_i/m

0.6

Tooth root thickness coefficient K_s

s_f/πm

0.65

Rack thickness coefficient δ₀^*

δ₀/m

2

Radius of root circle R_f (mm)

m (z/2 − h_f^*)

29.494

Radius of inner surface R_i (mm)

R_f − m δ₀^*

28.744