Patent ID: 7392598

Claim:
A method of measuring a dimension of a constant velocity universal joint to measure the distance from the center of a spherical inner surface of an outer member of the constant velocity universal joint to the center of ball grooves thereof, comprising the steps of: supporting an outer member as a measurement reference whose distance from the center of the spherical inner surface to the center of the ball grooves has been measured in advance, and inserting balls into some of the ball grooves defined in an inner wall surface of an open tubular member of said outer member; causing a measuring probe disposed between the balls to project into abutment against the inner wall surface of said tubular member, and using the amount of displacement of said measuring probe until said measuring probe abuts against the inner wall surface of said tubular member, as a reference amount of displacement; supporting an outer member to be measured and inserting the balls into some of the ball grooves defined in the inner wall surface of the tubular member of said outer member; causing said measuring probe to project into abutment against the inner wall surface of said tubular member; and calculating the difference between the amount of displacement of said measuring probe until said measuring probe abuts against the inner wall surface of said tubular member and said reference amount of displacement.