FAG ZM80 precision locknut

FAG ZM80 belongs to precision locknut, part of our Bushings and sleeves range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for ZM80 and any equivalents.

FAG ZM series precision locknuts are designed to hold spindle and precision bearings firmly in place on a shaft. They are used in machine tool spindles and other high-accuracy assemblies where a standard nut would not provide the necessary clamping force or rotational precision. The bearing contact faces are machined to tight tolerances to prevent distortion of the bearing during tightening.

The number in the designation indicates the nominal thread size. For example, a ZM60 fits an M60 thread, while a ZM100 fits an M100 thread. Therefore, selection is based on the shaft or spindle thread, not on the bearing bore diameter.

These locknuts lock using their own integrated locking elements, eliminating the need for a safety washer and avoiding the need to machine a keyway on the shaft. Tightening is done with a hook or pin wrench, and the torque should be set according to the bearing manufacturer's instructions and the assembly requirements.

Typical applications include lathe, milling, and machining center spindles, rotary tables, grinding machine spindles, and any shaft that carries matched precision angular contact bearings. In such setups, the locknut controls preload and helps maintain system stability over time.

When replacing a precision locknut, check the thread size and pitch, the available space around the shaft, the wrench type it accepts, and the locking mechanism. During spindle disassembly, it is advisable to replace the locknut along with the bearings if there are marks on the bearing faces.

To request a quote for FAG ZM precision locknuts, send the complete part number or thread size via WhatsApp or email. Our team responds promptly and can assist with equivalents and selection.