According to the tooth contact strength: d 1t≥2.92* under the cubic root;

φ r is 1/3 KA= 1, and Kt= 1.3 is selected as far as possible. Look-up table shows that zekhβ be khα = kfα =1khβ = kfβ =1.5khβ be k = ka * kv * kα * kβ.

Find out б hlim1б hlim2n1= 60 * n1* j * lhn2 = n1/u Find out KHN 1 KHN2.

Take the failure probability 1% and the safety factor s =1:[б h]1= khn1* б hlim1/s [б h] 2 = khn2 *б

[бH]=[бH] 1 *[бH]2/2

D 1t≥ ... Formula =

Calculate v = 3.14d1t * n1/60000 and look up the table to get KV.

Correction: d1= d1t (k/kt) Mn = d1/z1under the cubic root number.

According to the tooth root bending strength design:

..

Compare the size of MN to choose the modulus and the number of teeth. ...