Small universal shaft coupling use to pass axis movement in

the different line. it have four models. Such as WSD,WS,WSS

,WHL,WSL. Material : 45#steel. Stainless steel. 40Cr. The

surface can be black, nickel, zinc processing.
WSD coupling material: WSD cross axis use the Alloy steels

(40Cr,40CrNi,20CrMO,20CrMnVB).After heat, The hardness is

58～62HRC. Other parts adopts 35 or 45 steel manufacturing and

approved by heat treatment 48 ~ 1498 HRC.  WSD coupling ends

connection forms:Both ends with same hole shape, there is a

cylindrical holes, take the keyway cylindrical holes, square

holes.At both ends by different hole shape, there is a

cylindrical hole with the keyway cylindrical holes, have

cylindrical hole with square holes, take the keyway

cylindrical hole with square hole