FAG ZMA60/98 precision locknut

FAG ZMA60/98 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 ZMA60/98 and any equivalents.

FAG ZMA series precision locknuts are used to axially secure bearings on spindle shafts in machine tools and other precision assemblies where a standard nut cannot provide the required rotational accuracy and clamping force. The bearing contact faces are machined to tight tolerances to prevent bearing deformation during tightening. MR Industrial Accessories supplies these locknuts to customers throughout the United States and in several Latin American countries.

The ZMA part number encodes two key dimensions: the first number indicates the nominal thread size, and the number after the slash gives the outer diameter of the nut. For example, ZMA60/98 is a nut with an M60 thread and a 98 mm outer diameter, while ZMA100/140 has an M100 thread and a 140 mm outer diameter.

These locknuts secure without a safety washer by using their own locking elements, so the shaft does not need to be grooved. Tightening is done with a hook wrench or pin wrench, and the torque should be set according to the bearing and the assembly instructions from the equipment manufacturer.

Typical applications include spindles in lathes, mills, and machining centers, rotary tables, grinding machine spindles, and any shaft carrying matched precision angular-contact bearings. In these setups, the nut controls preload and long-term stability of the assembly.

When replacing a precision locknut, check the complete thread (size and pitch), the clearance around the shaft, the wrench type it accepts, and the locking mechanism. If the bearing faces show marks during a spindle teardown, it is advisable to replace the nut along with the bearings.

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