The KEY may fail:
By SHEARING Rs = b x L x fs
By CRUSHING Rc = 1/2t x L x fc
Useful EMPIRICAL proportions to use:
b = 1/4d and t = 1/6d
Tshaft = kw x 60 / 6.48 x N
Where Tmax = 1/5d3
Where Tkey = F x 1/2d
By SHEARING Rs = b x L x fs
By CRUSHING Rc = 1/2t x L x fc
Useful EMPIRICAL proportions to use:
b = 1/4d and t = 1/6d
Tshaft = kw x 60 / 6.48 x N
Where Tmax = 1/5d3
Where Tkey = F x 1/2d