Suitability and function
Shaft nuts HMZ allow precise, secure axial location of bearings on cylindrical and tapered shafts or on adapter sleeves.
The shaft nuts are made from steel and the tensile strength is at least 350 N/mm2.
Shaft nuts HMZ are interchangeable with conventional locknuts HM and KM. They are secured, however, not by means of form fit using tab washers or retaining brackets, but by force locking. Four or eight axial clamping screws allow uniform clamping of the thread flanks on the circumference. There is no need for slots on the outside diameter of the nut.
For screw mounting on the shaft thread, four or eight threaded blind holes are applied to the circumference of the nut, into which the threaded rod also supplied is screwed.
Advantages for the shaft
A shaft with a screw mounted shaft nut does not require a retaining slot. As a result, the shaft has higher strength and is more economical to manufacture than a shaft with a retaining slot for a tab washer or retaining bracket.
Detailed description of shaft nuts HMZ TPI WL 91-8.
The clamping screws serve to generate a force locking connection between the nut and shaft thread