The standard toothless four-point contact ball slewing bearing is a universal, versatile rotary component engineered for light to medium-duty mechanical rotation scenarios. Following mature industrial standard specifications, this gearless slewing ring adopts a simplified integrated ring structure with no internal or external gear teeth. It focuses on pure rotational stability, flexible assembly compatibility and low operational attrition, serving as a cost-effective and highly adaptable core part for modern automated machinery, mobile rotary equipment and general industrial mechanical systems.
Custom-built handling and positioning equipment
Systems where belt or friction drives are preferred over gear drives
Noise-sensitive environments where gear noise must be minimized
Solar tracking and antenna positioning systems
Light to medium-duty turntables and rotary indexing tables




| Inquiry | Type | Brand | Drawing No. | Boundary Dimensions | Weight | Abutment Dimensions | Mounting Holes N1 | Mounting Holes N2 | Other Specification | Lubrication Spots | |||||||||||
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| d[mm] | D[mm] | T[mm] | J1 | J2 | N1 | N2 | Number N1 | Hole Type | Number N2 | Hole Type | D1 | d2 | H1 | H2 | Size | Location | |||||
This series features a classic optimized four-point contact ball structure that delivers outstanding composite load performance. Precision polished steel rolling elements match perfectly with induction-hardened gothic arch raceways, forming four stable stress-bearing points during operation. This structural advantage enables the bearing to cope with multiple complex loads simultaneously, including axial tension and compression, radial pressure and overturning torque. Even under long-term continuous rotation, frequent start-stop operation and variable load fluctuations, it can evenly disperse operating stress, effectively reducing rotational jitter, friction loss and mechanical fatigue to maintain stable dynamic accuracy.
The gear-free structural design is the key feature that enhances the application versatility of this bearing. Different from traditional geared slewing rings, the smooth toothless ring eliminates common mechanical defects such as transmission backlash, gear meshing noise and tooth surface wear. Without the restriction of fixed gear transmission ratios, the component can be flexibly matched with various drive modes, including direct motor drive, hydraulic rotary drive and friction wheel drive. This great design freedom adapts to diversified mechanical layout demands, especially suitable for precision positioning equipment, low-noise operating devices and compact customized rotary systems.
Made of high-quality industrial alloy steel, the bearing boasts excellent structural stability and long service life. Critical raceway surfaces are processed with professional high-frequency induction hardening technology, which significantly improves surface hardness, wear resistance and anti-fatigue capability, avoiding surface peeling and abrasive damage caused by long-cycle repeated movement. Equipped with bilateral high-performance rubber sealing structures, the bearing forms a closed internal protection space. It effectively isolates external dust, moisture and fine particulate impurities, while stably retaining internal lubricating grease to ensure low-friction and maintenance-free operation in various indoor and outdoor working environments.


