CouplingThe hole type code is:
Y type-long cylindrical shaft hole; Z type-long conical shaft hole with counterbore; J type-short cylindrical shaft hole with counterbore;
Z1 type-long conical shaft hole without counterbore; J1 type-short cylindrical shaft hole without counterbore.
The keyway form code is:
A-type flat key single keyway; C-type tapered shaft hole flat key single keyway; B type 120°arrangement flat key double keyway; D-type cylindrical shaft hole ordinary tangential keyway; B1 type 180°arrangement flat key double keyway;