Crankshaft size for choose:
A2 (keyway ,diameterφ20.0 mm,length 58.5mm, key size48*5, M8-6H)
A4 (keyway, diameterφ19.05mm,length58.5mm, key size 48*5, M8-6H)
A7 (keyway, diameterφ19.05mm, length58.5mm, key size45.5*4.78,5/16-24UNF)
A8 (keyway, diameterφ20.0 mm, length 50.0mm, key size38*5, M8-6H)
B2 (Screw, dismeterφ19.05mm, length58.5mm, 3/4-16UNF)