Selection of shaft hole of coupling

When selecting a coupling, whether the shaft hole has a counterbore or not depends mainly on whether the shaft can have axial movement, whether axial tension or installation space is required.

There are three types of shaft holes for couplings: Y-type, J-type, and Z-type.

The Y-shaped shaft hole is a long cylindrical shaft hole.

Z type shaft hole is divided into Z type and Z1 type, Z type is a short conical shaft hole with counterbore, and Z1 type is a short conical shaft hole without counterbore.

The J type shaft hole is divided into J type and J1 type. J type is a short cylindrical shaft hole with counterbore, and J1 type is a short cylindrical shaft hole without counterbore.

The taper of the Z-shaped shaft hole is 1:10.

Generally, the counterbore of the coupling is indicated by J1 in accordance with the national standard. Please specify or mark it when ordering.