Cylindrical worm and wormwheel

Cylindrical worm

Axial module of the worm = mx = Image169
Axial pitch in mm = px = mx.p
Axial pitch of the worm in mm = pz = z1.px or dm1.p.tggm
Tooth depth in mm = h = 2,16.mx or 2,25.mx
Addendum in mm = ha = mx
Dedendum in mm = hf = 1,16.mx or 1,25.mx
Number of threads of the worm = z1 = Image170
Lead angle = gm = tggm = Image171 = Image172 = Image173
Tip diameter of the worm in mm = da1 = dm1+2.mx
Pitch circle diameter of the worm in mm = dm1 = 2.a – d2 or da1 – 2.mx
Number of teeth of the wheel = z2 = Image174 = Image175
Throat diameter of the wheel in mm = da2 = d2 + 2.mx
Pitch diameter of the wheel in mm = d2 = z2.mx = da2 – 2.mx
Root diameter of the worm in mm = df1 = dm1 – 2.hf
Root diameter of the wheel in mm = df2 = d2 – 2.hf
Centre distance in mm = a = Image176
Throat radius of the wheel in mm = rg = Image177