DIN 981 locknuts are a type of locking device for rolling bearings, they are usually used to fix the axial position of bearings or other mechanical components on the shaft. These locknuts are designed to provide simple and reliable locking.

Stainless Steel (304/316): Offers superior corrosion resistance and is suitable for moist or corrosive environments. The 316 grade has additional molybdenum, providing even better corrosion resistance, especially in marine applications.

Carbon Steel: Provides good strength and is the most common material for bolts. It may require additional surface treatments like galvanizing for increased corrosion resistance.

Alloy Steel: Offers enhanced strength and durability. It is often used in high-stress applications where high tensile strength is required.

Advantage:

1. No need for stop grooves on the shaft: this avoids weakening the shaft and simplifies the production process. 2. Easy installation: no additional lock washers or locking fixtures are required, reducing the number of installation steps. 3. uniform locking: through the axial locking screw to provide uniform locking force, to prevent damage to the shaft threads or sleeve threads. 4. Interchangeability: Fully interchangeable with conventional locknuts. 5. Anti-loosening: Prevents loosening of the locknut by means of a friction connection.

Scope of 

Application

1.Paper making machinery: used in paper making machinery to fix the bearings that support large drums. 2. Wind turbines: used in the main bearing fixing of wind turbines to ensure the stability of the bearings. 3. mechanical transmission: used in fixing and locking bearings in mechanical transmission systems.