Lock Nuts (Locking Nuts) are sleeve accessories. They are used to locate bearings onto a shaft. Additionally, lock nuts can be used to mount bearings with a tapered bore onto tapered shaft seats and adapter sleeves, and to dismount bearings from withdrawal sleeves. Lock nuts are also frequently used to secure gears, belt pulleys and many other machine components.

HM Locking Nuts (ANL Locking Nuts) are often referred to as Bearing Nuts or Shaft Nuts. They are commonly used in conjunction with suitable tab washers to securely locate bearings and other components onto a shaft. They can also be utilized when mounting taper bore bearings onto shafts.

HM Lock Nuts have eight-equally-spaced slots machined into the outer diameter of the nut, enabling the nut to be secured into position using the approproate tab washer by bending the tab into the slots.

HOLK Bearing produces a wide range of lock nuts, including series of KM, KML, AN, ANL, HM, HML, KMP, KMFE series, etc. Available in diameters ranging from M10 to M200, with other sizes available to supply.

Technical Details:

Product Name: Lock Nuts, Locking Nuts, Bearing Nuts, Shaft Nuts

Series: HM 3100 series, HM 31 series, AN series

Material: Carbon Steel, Stainless Steel

Roughness: below Ra 3.2

Surface Treatment: Anti-Rust oil; Blackening is available upon request

Packaging: Neutral, customized packaging is also available

Image gallery of different lock nuts

Drawing and Technical Data Sheet of HM 3100 series/HM 31 series (AN) Lock Nuts

Great care has been taken to ensure the correctness of the information contained in this publication but no liability can be assumed for any incorrect or incomplete data. The HOLK technical department reserves the right to final interpretation.

Incoporated in 1999, HOLK Bearing leads the way in the design and manufacture of quality Bearing Housings, Split Plummer Blocks, Bearing Adapter Sleeves, Withdrawal Sleeves, Precision Lock Nuts, Locking Assemblies, Hydraulic Nuts, Bearings and accessories. We pride ourselves on an immediate and dedicated response to standard and special bearing housing solutions. 

HOLK's maximum bearing housing fabrication capability: up to 5 tons/pc

We supply top-notch quality Split Plummer Blocks worth more than US$1,000,000 to a big famous European bearing company every year.

We manufacture premium quality Bearing Adapter Sleeves worth more than US$500,000 to a big famous European bearing company every year.