Carbon Steel Rolling Bearings Locknuts DIN 981 (KM)
Product Overview
Rolling Bearings Locknuts, also known as bearing locknuts, are precision-engineered components used to lock bearings and other machine components onto a shaft. Designed according to the DIN 981 (KM) standard, these locknuts are typically used in conjunction with tab washers (DIN 5406) to secure bearing assemblies effectively. Their primary function is to fix bearings axially and ensure operational stability, especially in rotating machinery. At Flybear Fastener, we ensure our DIN 981 locknuts meet the highest standards of precision and durability, making them ideal for use in demanding mechanical environments.
Product Specification Table
| Specification | Detail |
|---|---|
| Product Name | Rolling Bearings Locknuts (KM) |
| Standard | DIN 981 |
| Thread Type | Metric Fine |
| Sizes Available | M10 to M200 |
| Thread Direction | Right-hand |
| Design | Slotted, with notches for tab washers |
| Application | Locking bearings on shafts |
Technical Parameters Table
| Parameter | Value Range |
|---|---|
| Material | Carbon Steel |
| Hardness | HRC 23-32 (as per spec) |
| Tensile Strength | ≥ 450 MPa |
| Surface Finish | Zinc-Plated, Phosphate Coated |
| Precision Class | ISO Grade 6H |
| Applicable Standard | DIN 981 |
Material Selection & Manufacturing Process
The Rolling Bearings Locknuts from Flybear Fastener are primarily manufactured from high-quality carbon steel, chosen for its excellent balance between strength, machinability, and cost-efficiency. The raw material is first inspected for chemical composition and mechanical integrity. The locknut body is then precision machined using CNC lathes to ensure fine thread finishes and tight dimensional tolerances. Finally, surface treatments such as zinc plating or phosphate coating are applied to enhance corrosion resistance, especially in environments prone to moisture or chemical exposure.
Our advanced heat treatment process ensures uniform hardness and strength, which is essential for the product’s performance in dynamic mechanical systems.
Typical Applications and Industrial Use Cases
Rolling Bearings Locknuts are critical in maintaining machine stability across various industries. Typical applications include:
- Electric motors and gearboxes
- Agricultural machinery
- Wind turbines
- CNC machinery
- Mining and heavy-duty equipment
- Industrial pumps and compressors
They are designed to prevent loosening due to vibration or thermal expansion, making them essential for maintaining axial positioning and mechanical efficiency.
Product Advantages and Competitive Strengths
The superiority of our DIN 981 locknuts lies in their:
✔ Premium Material:
We use only top-grade carbon steel, ensuring tensile strength, fatigue resistance, and machinability.
✔ Precision Engineering:
Our locknuts feature accurate thread profiles and tight tolerances for perfect shaft and bearing fit.
✔ Surface Protection:
Zinc plating or phosphate coating gives excellent rust and corrosion resistance, extending service life.
✔ Customization Capability:
We offer both standard and custom locknuts based on customer drawings or prototypes.
✔ Sufficient Stock and Swift Delivery:
With an extensive inventory and efficient logistics, we ensure timely delivery for both bulk and small orders.
✔ Comprehensive Support:
We provide timely technical consultation and a reliable after-sales support system.
Company Testing and Quality Control
At Flybear Fastener, every Rolling Bearings Locknut undergoes rigorous quality checks and dimensional inspections using high-precision tools. Our QC process includes:
- Thread gauge inspections
- Profile and dimensional checks
- Surface finish and hardness testing
- Salt spray corrosion tests for plated surfaces
- Material traceability and batch control
These strict quality protocols ensure our customers receive products that perform flawlessly in critical applications.
Installation Guide and Purchasing Tips
When selecting Rolling Bearings Locknuts, consider:
- Shaft diameter and thread specifications
- Compatible bearing and tab washer types
- Environmental factors requiring corrosion protection
- Operating loads and mechanical stresses
For ease of installation, ensure the matching tab washer (DIN 5406) is properly aligned with the notches in the locknut. Greasing the shaft before assembly can also help prevent galling in high-torque applications.
Always source from a reputable supplier like Flybear Fastener to ensure conformity with international standards.
Additional Considerations
Rolling Bearings Locknuts are often used with:
- Adapter sleeves (for tapered bore bearings)
- Withdrawal sleeves
- Locking washers or toothed washers
Their unique notched design allows for secure engagement with lock washers, reducing the risk of vibration-related loosening. As they support high radial loads, they’re essential in high-speed rotating applications where reliability is critical.
Summary & Company Introduction
At Flybear Fastener, we pride ourselves on delivering premium-quality mechanical components like our Rolling Bearings Locknuts. We always adhere to the principle of “Quality First, Customer Oriented” and are committed to providing our clients with high-performance fastener products and reliable one-stop fastening solutions.
Whether you’re an OEM, MRO buyer, or an engineering team sourcing critical components, Flybear Fastener is your trusted partner. Explore our full product range and contact us to discover how we can support your project with tailored solutions and competitive pricing.
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