Mining crushing equipment, cement rotary kiln support rollers, large bucket elevators, industrial induced draft fans, paper press rolls and long-distance belt conveyors adopt long transmission shafts and large-span frame structures. During operation, material impact, frame vibration and temperature variation easily lead to shaft deflection and assembly misalignment. Ordinary roller bearings have no self-aligning capacity; slight tilt causes unilateral eccentric loading of rollers and sharp local stress, resulting in rapid pitting failure. Spherical roller bearings utilize spherical outer rings and double-row spherical rollers to allow angular deflection between inner and outer rings, thoroughly solving long shaft misalignment problems. Most equipment operates in open-air or high-dust workshops under continuous alternating shock heavy loads and wide temperature fluctuation. Strict requirements are imposed on bearing load capacity, vibration resistance and wear durability, making spherical roller bearings standard core components for heavy machinery in mining, building materials, paper and metallurgy industries.

Focusing on R&D of heavy-duty self-aligning bearings for heavy industry, Japan NMT launches 22200, 22300, 23000 and 23100 series spherical roller bearings to solve industry pain points of traditional models including roller edge stress concentration, surface scuffing under poor lubrication, insufficient cage strength, aggravated raceway abrasion in dusty environments and inadequate clearance matching. Adopting classic self-aligning structure with double-row spherical rollers, combined with five core upgrades including high-purity vacuum-degassed bearing steel, precision roller crowning, high-strength brass/steel stamped cages, optimized spherical raceway profile and diversified C0/C3/C4 clearance options. Two bore types are available: cylindrical bore and tapered bore. Tapered bore variants can be mounted on smooth shafts conveniently via adapter sleeves. Widely matched with heavy equipment in mining, cement, fan and paper industries, the bearings balance load distribution between double-row rollers, mitigate impact stress and greatly extend service life under harsh conditions.

Core Product Advantages

1. Powerful self-aligning performance compensating shaft deflection and assembly errors: Spherical outer ring matched with double-row spherical rollers permits angular deflection of inner ring, effectively absorbing long shaft bending, frame deformation and installation deviation, eliminating unilateral eccentric loading of rolling elements and preventing premature fatigue failure.

2. Superior radial load capacity plus moderate bidirectional axial load capacity: Line-contact double-row spherical roller structure delivers outstanding radial load capacity and tolerates certain bidirectional axial forces, ideal for equipment such as crushers and conveyors under alternating combined heavy loads.

3. Two bore configurations: cylindrical bore & tapered bore for flexible mounting schemes: Cylindrical bore positioned by shaft shoulders; tapered bore installed on shoulder-free smooth shafts with adapter sleeves, simplifying shaft machining and facilitating later disassembly and maintenance, suitable for equipment retrofits and new machinery design.

4. Precision roller crowning restraining edge stress and surface spalling: Optimized crown profiling on both roller ends eliminates peak contact stress under eccentric and impact loads, lowering risks of edge pitting and scuffing on rollers and raceways and greatly improving impact fatigue life.

5. Multiple clearance grades adapting to high/low temperature and heat generation conditions: Complete C0, C3, C4 clearance options; C3/C4 large-clearance models are preferred for high-temperature rotary kilns and large fans to compensate thermal expansion during operation and avoid bearing seizure.

Application Scenarios

Main shaft supports for jaw crushers, cone crushers and ball mills; bearings for cement rotary kiln support rollers, roller presses and bucket elevators; main shafts of large induced draft fans, exhaust fans and blowers; support bearings for paper machine press rolls and dryer cylinders; rollers of long-distance belt conveyors and apron feeders; heavy-duty rotary positions of metallurgical sintering equipment, lime production lines and mining screening machines.

Precision Quality Assurance

NMT spherical roller bearings are manufactured strictly in accordance with Japanese heavy-industry bearing standards. Raw materials undergo ultrasonic flaw detection piece by piece. Tests including continuous combined load durability test, impact fatigue test, tilted self-aligning operation simulation, dust abrasion test and hot-cold cycle dimensional stability test are carried out. Featuring sufficient load margin, stable self-aligning rotation and excellent vibration & wear resistance, the bearings fully adapt to harsh long-term shock heavy-load conditions with frequent shaft misalignment for mining, cement, paper and metallurgical machinery.

Product Range

22200,22300,23000,23100,23200 series spherical roller bearings; cylindrical bore & tapered bore; solid brass cages, stamped steel cages; open construction; C0, C3, C4 clearances; abundant standard sizes in stock, adapter sleeves available as matched sets, customized medium & large non-standard sizes supported.

Brand Strength

Japan NMT focuses on R&D and manufacturing of heavy-duty spherical roller bearings, specializing in core technologies including spherical roller profile optimization, raceway superfinishing, stress simulation under impact loads, cage reinforcement and stabilized heat treatment. Supported by heavy-load impact test benches and precision machining lines for large bearings, NMT solves common industry pain points such as roller spalling, vibration noise and insufficient clearance under high temperature of bearings used in mining and building material equipment, supplying high impact-resistant long-life spherical roller bearing solutions for global heavy industry, mining, building material and paper machinery manufacturers.