1B Type with inner gear

1B Type with inner gear

1B Type with inner gear

The 1B series is a standardized single-row four-point contact ball slewing bearing with internal gear structure, specially designed for light to medium-duty rotary mechanical systems. Adopting mature industrial manufacturing techniques and optimized gothic arch raceway design, the 1B internal gear slewing bearing delivers stable comprehensive load capacity, precise rotational performance and excellent cost efficiency. It has become a universal and reliable core component widely used in industrial automation, mobile engineering machinery and various rotary drive equipment.



Typical Applications:

Aerial work platforms and man lifts

Solar tracking systems

Radar and antenna positioning systems

Materials handling equipment




  • 1B Type with inner gear
  • 1B Type with inner gear
  • 1B Type with inner gear
InquiryTypeBrand Drawing No.Boundry DimensionsAbutment DimensionsMounting Holes N1Mounting Holes N2Other SpecificationCircumferential ForceLubrication SpotsWeight
d[mm]D[mm]T[mm]J1J2N1N2Number n1Hole TypeNumber n2Hole TypeD1d2H1H2Bm(DP)zXFTDovFmaxTypeSizeLocationNumber

The 1B series adopts an integrated internal gear processed on the bearing inner ring, providing prominent structural advantages for compact equipment layout. The precision involute gear teeth are manufactured with strict tolerance control and professional heat treatment, ensuring low backlash, high meshing accuracy and stable torque transmission. Compared with external gear slewing bearings, the internal gear structure effectively protects gear teeth from external impact, dust erosion and abrasive wear, saves installation space and simplifies the overall drive system assembly. It can be perfectly matched with standard drive pinions to achieve low-noise, high-efficiency and low-maintenance power transmission, which is ideal for compact and precision rotary equipment designs.

Manufactured with high-strength alloy steel bearing rings and high-purity bearing steel rolling elements, the 1B series possesses excellent mechanical toughness and structural durability. Key working surfaces such as raceways and gear teeth undergo high-frequency induction hardening treatment, which greatly improves surface hardness, wear resistance and anti-fatigue performance, avoiding surface peeling and abrasion during long-term cyclic operation. Equipped with durable double-lip rubber sealing structures on both sides, the bearing effectively isolates dust, moisture and particulate contaminants, prevents internal lubricant leakage and grease pollution, and maintains a stable internal lubrication state for long-term reliable operation in various complex working environments.


Drawing 1.png

Drawing 2.png