NMFTAIntroduction to Lock Nut

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Precision locking nuts are designed to provide adjustment capability, preload, and fixed bearings for spindles and other rotating mechanical components. These nuts can precisely set the preload of the bearing and can withstand axial loads very firmly without loosening. Therefore, nuts can bear very high loads.

All precision locking nuts can provide locking and anti loosening functions using their own parts, without the need for any other components, stop rings, or additional mechanical processing. Different series

The locking nuts of each column also use different anti loosening methods.

The NMFTA series achieves locking by embedding copper radial locking pins and fixing them with fixing screws. Its precision machined threads and axial deflection do not exceed 0.005mm.

The axial deflection of each locking nut is extremely small, allowing for precise assembly and uniform force distribution on bearings and other components. Excellent thread fit accuracy enables

Repeated assembly (tightening) and disassembly (loosening) of nuts have become possible.

In order to maximize the load capacity of the lock nut, the matching thread must have both extremely high quality and appropriate strength. The specification table lists thread accuracy based on ISO6g or higher

(4h is suitable for high-precision applications such as spindles) and rated static load and loosening torque of 690N/mm2 (10000PSI) material strength. Additionally, it is necessary to verify the tooth profile tolerance and

And the surface roughness of the mating surface (i.e. threaded surface) should not exceed 0.8 μ mRa as much as possible

Lock nut design

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Norman Tower Precision Nut is made of high-strength alloy steel, with a hardness of 28 to 32 HRC after heat treatment. The heat treatment process increases the strength of the material and gives it a strong appearance

Has high elasticity and can withstand severe impacts. The locking nut adopts precision machined threads with a tolerance grade of ISO 6H