Straight or crossed knurling, in the midst of a workpiece or behind a turned shoulder.
The material is deformed without any radial effort on the collet or the guide bush.
These knurling heads are used for straight or crossed knurling (30° or 45°) in the midst of a workpiece or behind a turned shoulder.
No radial pressure will be exerted on the workpiece during the knurling operation.
The MOJ head engages onto the workpiece in open position, closing is effected by an action on the lever. We use therefore a slide of the machine. This cutting-in motion on the lever should not exceed 1 second.
Knurling is obtained by material deforming. Therefore, the diameter before knurling
increases by 25 to 35 % of the pitch value, according to the machined material.
These values are in direct relation with the material resistance.
The knurled diameter is in direct relation with the position of the lever of the MOJ head, i.e. of the slide.