WH- no expansion welding universal coupling is a kind of fixed rigid coupling widely used. Simple structure, reliable operation, large transfer torque, easy assembly and disassembly. Shaft hole keyway form according to gb3852-83 provisions. WH non-telescopic welded coupling USES high-strength bolts and self-locking nuts to connect the flanges at both ends to other mechanical components. The torque is transmitted through the flange end keys and friction forces between the flanges.