We supply constant  C. V.joint.The stationary ball constant-velocity joint, it joins including one outside, this outside joins has the admission ball guide channel and is located between the guide channel the union area.

States the union area to contact casing the outside surface, and has the hollow part, the hollow part extends in the union area entire ring-like width.

States the hollow part to be located the casing the outside surface and the relative union area surface first and between the second contact part.

The hollow part reduced the area which must form precisely, therefore is advantageous for the union area surface forming. States the union area after the hardening, but, before hardening, may establish the hollow part.

After hardening, is equipped with the hollow part the union area surface not to carry on the metal cutting processing, but may elect is the elimination the oxide skin which produces by the hardening.