The Lock Nut KM25 – 125X160X21 by CRF is a precision-engineered bearing accessory designed for the secure fastening of bearings to shafts. This specific lock nut, with dimensions of 125 mm bore diameter, 160 mm outer diameter, and 21 mm thickness, is ideal for applications requiring robust axial clamping. It is widely used in various industrial sectors, providing dependable performance in mechanical assemblies. With SKU KM25-ECO, the lock nut serves a critical role in ensuring the stability and proper functioning of bearing arrangements.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 125 mm |
| Outer diameter (D) | 160 mm |
| Width / Thickness (B) | 21 mm |
| Weight | 1.5 kg |
| Basic dynamic load rating (C) | 50 kN |
| Basic static load rating (C0) | 80 kN |
| Limiting speed | 3,000 rpm |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
The CRF Lock Nut KM25 offers several technical benefits that enhance its functionality in industrial settings:
- High clamping force with a dynamic load rating of 50 kN, ensuring secure bearing retention.
- Manufactured from heat-treated 100Cr6 chrome steel for enhanced durability and performance.
- Standard CN internal clearance, suitable for non-preloaded bearing assemblies.
- Operates efficiently at speeds up to 3,000 rpm, accommodating high-speed applications.
- Precision class P0 / ABEC-1, providing reliable accuracy for general industrial use.
Typical applications
The Lock Nut KM25 is utilized across various industries where secure bearing placement is critical. Some typical applications include:
- Industrial machinery (gearboxes, compressors, and conveyor systems)
- Automotive manufacturing (wheel hubs, transmission assemblies)
- Mining and construction equipment (excavators, drill rigs)
- Heavy-duty agricultural machinery (tractors, combine harvesters)
Availability and ordering
Eurobearing.eu, a specialized B2B supplier, ensures fast availability of the Lock Nut KM25 with SKU KM25-ECO. Customers can easily add this product to their cart or request a quotation for bulk quantities. Explore competitive pricing and reliable supply by visiting our catalog today.

