The slewing gear ring is a key component of slewing bearings in large equipment, realizing rotational movement through meshing with drive gears while bearing axial, radial forces, and overturning moments. It is widely applied in construction machinery, port equipment, wind power devices, etc.
Classified by gear ring position into external, internal, and toothless types, it commonly uses involute tooth profiles with hardened surfaces for wear resistance. Manufacturing requires high-precision equipment to ensure transmission accuracy and load capacity, while composite sealing designs enhance durability. It is often integrated with slewing bearings to form an “support + transmission” integrated solution.
Range of external diameter: 100 mm to 70000 mm
Quenching and tempering materials:45 #, 35SiMn, 40Cr, 40CrNi, 40MnB
Quenched materials:20Cr, 20CrMnTi, 20MnB, 20CrMnTo
Quenching and tempering hardness: HB220-260
Quenching hardness: 48-55
Delivery type: 35-50 days
| TYPE | RACEWAY DIAMETER | EXTERNAL TEETH | OVERTURNING MOMENT |
| SR7 | 187mm (7″) | 73 | 13.6 kN-m |
| SR9 | 229mm (9″) | 61 | 33.9 kN-m |
| SR12 | 305mm (12″) | 78 | 54.2 kN-m |
| SR14 | 356mm (14″) | 85 | 67.8 kN-m |
| SR17 | 432mm (17″) | 102 | 135.6 kN-m |
| SR21 | 533mm (21″) | 125 | 203.4 kN-m |
| SR25 | 635mm (25″) | 150 | 271.1 kN-m |
Integrated Gear & Bearing Design Capability
External gear, internal gear, and gearless configurations
Precision gear cutting and grinding
Optimized meshing performance
High Load Capacity & Structural Reliability
Designed to support combined loads (axial, radial, moment)
Optimized raceway geometry
High safety factor for critical equipment
Advanced Material & Heat Treatment
High-quality alloy steel and bearing steel
Induction hardening of raceways and gear teeth
Improved wear resistance and fatigue life
Precision Machining & Quality Control
CNC machining for large-diameter rings
Controlled raceway hardness and depth
Non-destructive testing (NDT)
Full traceability of materials and processes
Custom Engineering Capability
We provide tailored solutions based on:
Load conditions
Installation dimensions
Gear module and tooth profile
Sealing and lubrication requirements
Surface Protection & Durability
Anti-corrosion coatings
Sealing systems for dust and water resistance
Suitable for harsh outdoor and offshore environments
Stable Production & Supply Capacity
Scalable manufacturing for large-diameter bearings
Consistent quality across batches
Support for OEM and project-based supply
Construction Machinery
Applications
Tower cranes
Crawler cranes
Excavators
Mobile lifting equipment
Value
Supports heavy loads and overturning moments
Enables smooth 360° rotation
Ensures operational safety and stability
Wind Energy Equipment
Applications
Yaw systems (nacelle rotation)
Pitch systems (blade angle adjustment)
Value
Maintains accurate wind alignment
Withstands variable dynamic loads
Ensures long-term reliability in harsh environments
Mining & Heavy Industry
Applications
Bucket wheel excavators
Stackers and reclaimers
Rotary kilns and platforms
Value
High durability under shock loads
Continuous operation capability
Resistance to dust and contamination
Port & Marine Equipment
Applications
Port cranes
Offshore lifting equipment
Marine deck machinery
Value
Corrosion-resistant solutions available
Reliable rotation under heavy loads
Stable performance in marine environments
Industrial Automation & Special Equipment
Applications
Rotating platforms
Solar tracking systems
Radar and antenna systems
Automated assembly equipment
Value
Precise positioning control
Compact integration of bearing and gear
Smooth, low-speed rotation
In addition, our Slewing Gear Ring is widely used in equipment in the following industries：
Why Choose Our Slewing Gear Rings?
✔ Proven performance in heavy-duty industries
✔ Precision gear integration capability
✔ Strong customization support
✔ Reliable quality and long service life
✔ Competitive cost-performance ratio
We have found that many people would like to learn about the application technology and selection of Bearing but do not have suitable materials to read. Our team of engineers constantly exports technology on our download page and blog, which you can download for free.
Hi, I am Maxwell, I am an engineer in the field of bearing applications. I majored in mechanical and electromechanical engineering during college. After graduation, I worked for the top three "SKF" bearing companies in the world for ten years , during which I went to dozens of customers in different industries to help them solve problems in bearing applications; later I joined VKUKEN Bearing Manufacturing, and I will share bearing technical knowledge on this website from time to time. If you are a customer Please contact me to help you solve your problem; if you are also a technical expert in bearings, I am very willing to exchange technical knowledge about bearings with you.
