Clinching points have high repeatability. Their quality can be easily checked with simple measuring operations.
For round points, the diameter of the boss is checked with a caliper. The resulting value is compared with the predetermined values reported in the machine’s use and maintenance manual based on the punch diameter and sheet metal thickness.

For the trapezoidal point, the widening of the cut part of the sheet metal is checked on the lower area of the boss, the value of which is compared with the predetermined values reported in the machine’s use and maintenance manual based on the width of the punch and the thickness of the sheet metal.