SKF lock nuts and locking devices are mainly used to fix bearings on shafts, ensuring stability and reliability. SKF offers lock nuts including KM 19 and KM 16 models, which have metric threads and four evenly distributed grooves to accommodate a wrench. They are prevented from accidentally loosening by locking washers and can be reused without damage.
Features of SKF lock nuts include: Simple, stable and reliable: These lock nuts are easy to install and remove, and can be reused after re-using new lock washers. Wide range of applications: Suitable for nuts with thread diameters from M 10×0.75 to M 200×3 (sizes 0 to 40)
In addition, SKF also offers other types of lock nuts, including SKF industrial lock nuts and precision lock nuts, which can ensure that the nuts are firmly fixed on the shaft through different locking mechanisms. For example, some lock nuts can be locked by keyways or keyways of adapter sleeves, or have built-in locking mechanisms to reduce costs and increase installation speed.
SKF Lock Nuts and Locking Devices are precision-engineered fastening solutions designed to secure bearings, pulleys, and other rotating components onto shafts, ensuring reliable operation under high loads, vibrations, and dynamic conditions. These components prevent axial displacement and loosening, maintaining precise alignment and extending the service life of machinery. SKF’s commitment to quality and innovation ensures these locking systems deliver unmatched durability, ease of installation, and adaptability across industries such as automotive, industrial manufacturing, renewable energy, and heavy equipment.
Key Features & Benefits
- Secure Axial Positioning
Anti-Loosening Design: Threaded lock nuts (e.g., SKF KM, KMF series) integrate locking collars or deformation grooves that create a permanent grip on the shaft, resisting vibration-induced loosening.
High Clamping Force: Engineered to withstand axial loads up to 80% of the bearing’s static load rating, ensuring stability in demanding applications.
- Versatile Locking Mechanisms
Lock Nuts with Integral Collars: Combine a nut and locking collar in one unit for simplified assembly (e.g., SKF KM series).
Lock Plates & Washers: Serrated lock washers (e.g., SKF W series) and tabbed lock plates prevent rotation by biting into mating surfaces.
Eccentric Locking Devices: Adjustable eccentric collars (e.g., SKF HMV series) for fine-tuning preload in tapered bore bearings.
- Durable Materials & Coatings
High-Strength Steel: Case-hardened carbon steel (C45) or stainless steel (AISI 304/316) for corrosion resistance in harsh environments.
Surface Treatments: Zinc, phosphate, or Durotect® coatings enhance wear resistance and reduce friction during installation.
- Easy Installation & Adjustment
Pre-Notched Design: Lock nuts feature pre-cut grooves for standard hook wrenches, enabling quick tightening without specialized tools.
Reusable Components: Lock plates and washers can be repositioned multiple times during maintenance.
- Compatibility & Customization
Metric & Imperial Threads: Available in M10 to M200 or ½” to 8” sizes to match global shaft standards.
Custom Configurations: Tailored thread pitches, diameters, and locking mechanisms for specialized applications.
SKF Lock Nuts and Locking Devices are indispensable for ensuring secure, reliable fastening in rotating machinery across industries. Their robust construction, anti-loosening designs, and adaptability to harsh environments make them a cornerstone of mechanical integrity in applications ranging from automotive wheel hubs to wind turbine gearboxes. By integrating SKF’s locking solutions, businesses achieve enhanced operational safety, reduced maintenance costs, and prolonged equipment lifespan. Backed by SKF’s global reputation for quality and innovation, these components represent a strategic investment in precision, durability, and performance for the most demanding engineering challenges.
