2026-08-02
NMT Ltd.
Corporate Communications Department
NMT Spherical Roller Bearing | Double-Row Self-Aligning Anti-Offset High-Load Impact-Resistant Dustproof Wear-Proof Bearing for Mining Vibrating Screens, Crushers and Metallurgical Heavy Machinery
1. Industry Working Condition Pain Points
Ordinary rigid bearings such as cylindrical roller bearings and tapered roller bearings have no self-aligning compensation capability. Once shaft deflection or eccentricity occurs, serious partial load and stress concentration cause rapid raceway spalling, roller cracking, cage fracture and bearing seizure, resulting in severe equipment vibration, abnormal noise and unplanned shutdowns.
2. Product Core Positioning
Different from rigid bearings that cannot tolerate assembly deviation and shaft deformation, NMT spherical roller bearings automatically compensate for spindle deflection, frame deformation and dynamic vibration offset, maintaining uniform fitting and stress distribution between rollers and raceways. They are the optimal upgraded core bearings for vibrating screens, crushers and ball mills.
First, Spherical Self-Aligning Adaptive Structure: The outer ring adopts an arc spherical raceway matched with symmetrical spherical rollers, allowing relative deflection between inner and outer rings. It automatically eliminates dynamic eccentric errors caused by equipment operation, completely solving partial load wear and edge stress concentration failures of rigid bearings with high fault tolerance for heavy machinery deformation and assembly errors.
Third, Bidirectional Axial Force Compatibility: The special spherical structure bears bidirectional axial thrust simultaneously without additional positioning bearings, effectively limiting spindle axial play of vibrating equipment, stabilizing gear meshing accuracy and reducing transmission vibration.
4. Two Core Structural Types for Accurate Scenario Matching
CC Reinforced Locking Structure (Extreme Impact Vibration): Optimized roller linearity and enhanced locking structure greatly improve impact, vibration and overload resistance. It is specially designed for extreme harsh working conditions such as mining crushers, large circular vibrating screens, ball mills and rotary kilns with extremely low failure rate and long-term stability.
All NMT spherical roller bearings are made of high-purity chromium bearing steel through vacuum refining, featuring high compactness and extremely low impurities to avoid early fatigue peeling caused by material inclusions.
Special wear-resistant passivation treatment enhances anti-abrasion performance against mineral powder, sand and iron scraps, effectively preventing raceway scratching and micro-wear in dusty mining environments.
Open Type: Excellent heat dissipation, suitable for well-ventilated metallurgical roller tables and reducers with convenient grease refilling and daily maintenance.
7. Wide Application Fields
Metallurgical equipment: Hot rolling roller tables, auxiliary cold rolling equipment, heavy-duty metallurgical reducers and rotary kiln transmission mechanisms;
General heavy industry: Large gear reducers, heavy-duty fan spindles, paper drying rollers and hydraulic transmission equipment with vibration, deflection and eccentricity characteristics.
NMT provides full-series spherical roller bearings with sufficient spot inventory, fully interchangeable with standard 22200, 22300, 21300 and 22400 series without equipment modification. Custom services including special clearance, high-temperature resistance, low-temperature impact resistance, heavy-load reinforcement and enhanced dustproof structure are available. Professional engineers provide one-to-one selection solutions according to equipment vibration frequency, impact load, shaft deflection and working environment to solve the industrial problems of short service life and high maintenance cost of vibrating equipment bearings.