Industrial ventilation fans, light belt conveyors, agricultural equipment, woodworking machinery and textile machinery belong to light industry and general machinery. Bearing support positions operate under harsh working conditions: medium-light alternating loads, slight deflection of long transmission shafts, coaxial deviation caused by frame machining and assembly errors, floating dust in workshops or outdoor sites, intermittent start-stop cycles and continuous steady rotation. Restricted by manufacturing costs, many small and medium-sized equipment cannot achieve ultra-high machining and assembly precision, leading to angular misalignment of shaft systems. Ordinary deep groove ball bearings cannot adapt to shaft misalignment and are prone to unilateral wear, overheating and abnormal noise, frequently causing equipment shutdown. Thanks to the unique spherical outer ring structure, spherical ball bearings become the preferred component for such low-precision assembly scenarios. Conventional spherical ball bearings often suffer insufficient raceway finish, poor sorting accuracy of steel balls and weak wear resistance of sealing lips, resulting in premature wear in dusty environments, which has long troubled machinery manufacturers.

Focusing on R&D and manufacturing of general light-duty transmission bearings, Japan NMT launches double-row spherical ball bearing series to solve industry pain points of conventional models including unstable self-aligning performance, excessive temperature rise at medium-high speed, easy seal failure in dusty conditions and susceptibility to pitting under alternating loads. Adopting optimized spherical outer raceway design, combined with five core upgrades including high-purity bearing steel, high-precision graded steel balls, low-vibration pressed cages, multiple sealing options and optional standard / C3 clearances, the series features built-in angular compensation and allows limited angular tilt between inner ring and housing. Two bore types are available: cylindrical bore and tapered bore; tapered bore variants can be mounted with adapter sleeves to fit simple shaft structures. Widely applied to fans, conveyors, agricultural and woodworking machinery, the bearings effectively absorb assembly errors and shaft deflection, reduce risks of abnormal bearing wear and extend fault-free service life of complete machines.

Core Product Advantages

1. Excellent self-aligning performance to withstand shaft deflection and assembly misalignment: Spherical outer raceway matched with double rows of steel balls permits limited angular deflection of inner ring relative to outer ring, effectively compensating shaft bending and frame assembly errors, avoiding unilateral loading of rolling elements and greatly lowering risks of eccentric wear, ideal for small & medium equipment with limited assembly accuracy.

2. Capable of radial loads plus moderate bidirectional axial loads with wide versatility: Double-row ball structure mainly carries radial loads and accepts moderate bidirectional axial loads, satisfying combined force requirements of general equipment such as fans and conveyors. Single bearing can realize supporting function with simple assembly scheme.

3. Two bore designs available for diverse mounting methods: Cylindrical bore types mount directly on plain shafts; tapered bore types work with adapter sleeves without complicated shaft shoulder machining, facilitating quick disassembly on long shafts and multi-bearing equipment, widely used for conveyor rollers and fan main shafts.

4. Multiple sealing options for dusty working environments: Open type for clean lubrication conditions; Z metal shields for dry dusty sites; 2RS rubber seals block fine dust and moisture for slightly humid workshops. Customers can select according to actual conditions.

5. Low frictional resistance, suitable for medium & low speed continuous operation: Rolling contact structure with low friction coefficient, controllable temperature rise under rated loads, adapting to long-time intermittent start-stop and continuous rotation of fans and agricultural machinery, delivering stable noise performance to meet light industry operation standards.

Application Scenarios

Main shaft bearings for industrial centrifugal fans, axial fans and dust removal fans; support bearings for light belt conveyors and roller conveying equipment; bearings for sowing machines, crushers and feed processing agricultural machinery; transmission bearings for woodworking sanders, cutters and planers; supporting positions for textile machines, small mixers and material handling fans.

Precision Quality Assurance

NMT spherical ball bearings are manufactured strictly in accordance with Japanese general bearing standards. Raw materials undergo flaw detection. Tests including self-aligning durability test, medium-speed temperature rise test, dust seal aging test and alternating load fatigue test are implemented. Featuring flexible self-alignment, stable operation and reliable sealing protection, the bearings are widely applicable to continuous operation conditions of small and medium machinery in light industry, agriculture, environmental protection and woodworking sectors.

Product Range

Spherical ball bearings with cylindrical bore, spherical ball bearings with tapered bore; open type, Z metal shield, 2RS rubber sealed type; standard C0 clearance & enlarged C3 clearance; full lineup of 12,22,13,23 series standard sizes, customized non-standard sizes available for partial specifications.

Brand Strength

Japan NMT focuses on R&D and manufacturing of general self-aligning rolling bearings, specializing in core technologies including spherical raceway profile optimization, low-noise assembly process, long-life sealing structure and stable heat treatment technology. Supported by automatic production lines and complete durability testing laboratories, NMT solves common industry pain points of bearings for fans, agricultural machinery and conveyors such as eccentric wear caused by shaft misalignment, easy dust ingress through seals and premature pitting failure, supplying cost-effective spherical ball bearing solutions for global light machinery manufacturers.