During assembly of textile production lines, material conveying equipment, drying machinery and agricultural machinery, misalignment between shafts and bearing seats or shaft deflection caused by frame deformation frequently occurs. Ordinary deep groove ball bearings cannot adapt to shaft offset. Assembly misalignment will lead to severe friction and violent vibration, resulting in overheating and fatigue peeling within short operation time. Equipped with spherical outer raceway, self-aligning ball bearings feature unique self-aligning performance. They effectively compensate angular deviation caused by shaft deflection, machining tolerance and assembly misalignment, and support radial loads as well as slight bidirectional axial loads. They are ideal for transmission structures with weak rigidity prone to deformation. Many conveying equipment continuously withstand material impact, and production sites are filled with dust and fiber debris, accelerating bearing abrasion under harsh working conditions. NMT Self-Aligning Ball Bearings include standard bore and wide inner ring types, with open and sealed versions available, widely used in light industry conveying, textile and agricultural machinery.

As automated production lines extend continuously, conveying frames feature larger spans. Elastic deformation occurs under load during equipment operation, and shaft deflection becomes increasingly prominent. Conventional bearings cannot tolerate minor alignment errors and suffer frequent premature damage, causing production shutdown losses. A large amount of cotton fluff and fiber dust float in the working environment of textile machinery, easily attaching to bearings, penetrating raceways, damaging grease and triggering steel ball abrasion and raceway scratching. Equipment manufacturers are in urgent need of bearings integrating self-aligning capacity, dust protection and long wear resistance. Featuring double-row steel balls and spherical outer raceway, NMT Self-Aligning Ball Bearings provide sufficient self-aligning allowance to absorb shaft offset induced by assembly error and structural deformation. Optimized raceway machining precision and optional sealing structure prevent invasion of fiber and dust, ensuring long-term continuous stable operation and delivering reliable solutions for rotating mechanisms facing misalignment risks.

NMT Self-Aligning Ball Bearings consist of outer ring, double-row steel balls, cage and separable inner ring. The outer ring adopts spherical raceway design, allowing moderate angular deflection of the inner ring relative to the outer ring to realize self-alignment and compensate angular deviation caused by shaft bending and misassembly. Two mainstream structures are available: standard inner ring and wide inner ring. Models with wide inner ring can be directly mounted on hubs to simplify assembly procedures. Open type and double-sided rubber sealed versions are provided for clean and slightly dusty environments. Double-row steel balls share loads evenly to achieve stable bearing performance, supporting heavy radial loads and moderate bidirectional axial loads. Cages are manufactured by precision stamping to guide smooth circulation of steel balls and reduce internal friction loss. Optimized geometric parameters guarantee smooth rotation and low vibration level. The products are widely applied in textile rollers, assembly line conveyor rollers, transmission shafts of drying equipment, agricultural machinery, small ventilators and light-duty reduction boxes.

Inner and outer rings are made of high-quality bearing steel. Precision forging and deep quenching heat treatment ensure sufficient surface hardness of raceways and excellent matrix toughness to resist cracks under impact loads. Superfinishing is conducted on spherical raceways to lower contact friction of steel balls and control temperature rise during operation. All finished bearings pass dimensional verification, clearance classification, self-aligning performance testing and continuous operation durability test. Units with abnormal vibration and substandard precision are eliminated to guarantee consistent performance among batches.

Multiple clearance specifications and abundant sealing styles comply with universal industrial standards with favorable interchangeability, offering complete supporting solutions for machinery prone to misalignment and deformation.

Core Product Advantages

Spherical outer raceway and double-row steel ball structure deliver outstanding self-aligning ability to compensate angular deviation induced by shaft deflection and assembly misalignment;

Capable of sustaining heavy radial loads and slight bidirectional axial loads, suitable for various composite stress conditions;

Multiple structures including standard inner ring and wide inner ring. Wide inner ring models simplify assembly without extra positioning sleeves;

Open type and double-sided rubber sealed versions optional. Sealed bearings effectively block dust and fiber debris from entering bearing interior;

Superfinished raceways reduce operation friction, stabilize temperature rise, slow grease deterioration and extend service life;

Excellent rotation balance and low vibration to meet continuous silent production requirements of textile machinery;

International standard dimensions ensure high universal interchangeability for convenient equipment renovation and spare part replacement;

Mature and reliable structure with easy maintenance, suitable for mass matching of long-distance conveying equipment and textile production lines.

Typical Application Scenarios

Textile machine rollers and spinning equipment; material conveyor rollers on assembly lines; light transmission shafts of drying and heat treatment equipment; agricultural machinery such as harvesters and threshers; small industrial axial fans; light-duty gear reducers; light paper-making conveying roller devices.

Quality Assurance

Raw materials of NMT Self-Aligning Ball Bearings receive sampling inspection on hardness and metallographic structure upon arrival to strictly control internal inclusions of steel. Forged blanks of inner and outer rings fully release forging stress and go through precision turning, heat treatment, rough grinding and spherical raceway superfinishing in sequence. Steel balls are grouped and assembled according to precision grades to ensure uniform load distribution. Cages are precisely machined and deburred for smooth rolling of steel balls. All finished products pass visual inspection, radial clearance sorting, vibration testing and no-load durability experiment. Bearings dedicated for textile and conveying equipment undertake additional durability test under simulated dusty environment. Defective products are separated independently. Every self-aligning ball bearing features flexible self-alignment, stable rotation and reliable wear resistance, effectively lowering equipment failure and shutdown frequency.

Product Range

Open self-aligning ball bearings, double-sided rubber sealed self-aligning ball bearings; full range of standard inner ring and wide inner ring types; normal clearance and C3 clearance available. Model selection depends on misalignment amplitude, dust environment, load condition and installation method.

Brand Strength

NMT devotes to R&D and manufacturing of self-aligning bearings. Targeting common shaft deformation and assembly misalignment of textile machinery and long-distance conveying equipment, NMT continuously optimizes spherical raceway machining technology, sealing structure and heat treatment scheme. The bearings effectively relieve partial wear and overheating failure caused by shaft offset. NMT helps machinery manufacturers improve overall equipment stability and cut maintenance investment in later operation stages.