leave a message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
Four point contact ball slewing bearing
Four point contact ball slewing bearing is specially designed for full trailers. Installed between the steerable wheel assembly and the chassis, it serves as the core rotary load-bearing component, enabling horizontal steering of the wheel group while simultaneously carrying axial loads, radial loads, and tilting moments. Besides, the product range covers light to heavy-duty applications, with external-tooth, internal-tooth, and toothless configurations available, compatible with hydraulic motors, hydraulic cylinders, or passive steering mechanisms.
Features & performance advantages
High load-carrying composite design: the raceways undergo medium-frequency induction hardening to HRC 55–62, enabling simultaneous resistance to axial, radial, and tilting loads under complex road conditions.
Double-lip seal for dust & water protection: equipped with NBR double-lip seals that effectively block mud, dust, and salt ingress, suitable for outdoor construction sites, ports, and coastal high-humidity, high-salt environments.
Reliable material: slewing rings are made of 50Mn or 42CrMo high-quality alloy structural steel; rolling elements adopt GCr15 bearing steel, ensuring long-term strength and wear resistance.
Customization available: non-standard dimensions, mounting hole patterns, gear parameters, surface treatments (black oxide / zinc plating / painting), and lubrication methods can be customized to match various trailer manufacturers installation interfaces.
Specification
| Material | 50Mn/42CrMo/other steel | Lubrication | grease |
| Diameter range | 200mm-6000mm | Package | plywood pallet/case |
| Gear type | No gear/external gear/internal gear | Shipping way | sea/air/railway |
| Hardness | HRC53±3 | Port | Shanghai/Guangzhou/named port |
| Precision grade | standard/high precision | Product orginion | China |
Our equipment
Why Choose Us
High load capacity, wear resistance & long service life
Strict dimensional tolerance, smooth rotation
Customization drawings / OEM / ODM available
Direct factory price, stable delivery
Complete inspection & test report before shipment
Suitable for heavy-duty engineering & harsh working environment
After Sales Service
Tailored product according to your drawings or samples
Professional technical support anytime
Strict quality inspection & full set of shipping documents
Fast delivery & safe packaging (plywood pallet/case)
One-year quality warranty
FAQ
1. Which slewing bearing structure should be chosen for a steerable flatbed trailer??
The choice primarily depends on the load capacity of the steerable axle and available installation space. Light-duty trailers (under 10 tons) typically use single-row four-point contact ball slewing bearings for their compact structure and low cost. Medium-duty trailers (10–30 tons) are recommended to use crossed roller slewing bearings for high rigidity and strong load capacity. Heavy-duty lowbed trailers (over 30 tons) should use double-row different-diameter ball or three-row roller slewing bearings to withstand greater tilting moments and axial loads. If steering is driven by a hydraulic motor, a toothed type (external or internal) is required; for hydraulic cylinder push-pull or passive steering, a toothless type can be selected.
2. What is the service life of a slewing bearing? How should it be maintained??
Under normal load and proper maintenance, the design service life of a slewing bearing is typically 10,000–20,000 working hours or 5–8 years, depending on load magnitude, operating frequency, and environmental conditions. Key routine maintenance points include: regular lubrication, bolt inspection, seal inspection and gear surface cleaning( if there is gear).
*For technical consultation or custom quotations, please provide specifications and gear parameters (module, number of teeth, face width, accuracy requirements, operating conditions, etc.). Our engineering team will deliver a professional solution tailored to your specific needs.
This four point contact ball slewing bearing is specially designed for trailers to achieve steering of the wheel group.
This kind of slewing bearing is a large-scale precision bearings designed to withstand combined loads. It's widely used in construction machinery and automated equipment.
This small internal gear slewing bearing is a professional rotary load-bearing component customized for large stacked metal sculpture installations. Installed between layered steel plates of the sculpture, it bears the overall vertical load of the multi-layer metal structure and supports stable 360° low-speed rotation of the entire sculpture column.
This kind of slewing bearing is a highly specialized single-row four-point contact ball slewing bearing, engineered exclusively for small hydraulic excavators and matched compact construction machinery.
Four point contact ball slewing ring bearing has many different standards for rotational applications, such as mini excavators, tower cranes, truck cranes, and aerial work platforms.
Single-row ball slewing bearing as the most widely used slewing bearing, has a single row of balls that contact the raceway at four points. This structure allows it to handle forces from multiple directions all at once. It is popular for medium-load applications, such as infrastructure construction, mining excavation, cranes, concrete pumps, and other medium-duty construction scenarios.
Single-row ball slewing bearing has two rings (inner and outer) with a single row of steel balls in a four-point contact raceway. It is widely designed for light-to-medium load applications, such as medium excavators, tower cranes, earthmoving equipment, and aerial work platforms.
Single-row ball slewing ring, also as four point contact ball slewing ring, consists of two rings (inner and outer). It is the standard choice for light-to-medium load applications, such as mini excavators, tower cranes, welding positioners, and aerial work platforms.
leave a message
Scan to Wechat :
Scan to Whatsapp :
