Cross Roller Slewing Ring Bearing

Cross Roller Slewing Ring Bearing – High-Rigidity Solution for Heavy-Duty Industrial Equipment

When your excavator demands exceptional rotational accuracy combined with heavy load capacity, Cross Roller Slewing Ring Bearing delivers where conventional ball-type bearings fall short. Engineered with single-row cylindrical rollers arranged in 90° crossed configuration at 1:1 spacing, this bearing type achieves up to 3–4 times than equivalent-sized ball slewing rings. Each adjacent roller's axis is perpendicular to its neighbor, enabling simultaneous support of axial, radial, and tilting moments within a compact envelope. Manufactured from 42CrMo/50Mn steel rings and GCr15 hardened rollers (55-62 HRC raceway hardness), our 11 series (110-114 configurations) covers diameters from 500mm to 3500mm standard, with custom sizes extending beyond 6000mm. These bearings are dimensionally interchangeable with industry-standard HJ series designations, ensuring global compatibility for truck cranes, excavators, military radar platforms, and precision test rigs.

Technical Specifications: 11 Series Structure and Configuration

Our product portfolio consists of five distinct configurations to match your application requirements:

Core Design Parameters

Key Performance Advantages: Compared to four-point contact ball bearings, our cross roller design provides tighter assembly clearance, superior rotational precision, and smoother operation under partial-load conditions. The trade-off includes 15-25% higher manufacturing cost and slightly reduced absolute load capacity at identical diameters—acceptable when rigidity and accuracy outweigh maximum load requirements.

Important Product Clarification

The term "crossed cylindrical roller bearing" describes two distinct product categories in the global market. To help you specify correctly:

Heavy-Duty Cross Roller Slewing Bearings (Our Core Product):

· Standard designation: 11 Series (China) / HJ Series (International)

· Diameter: 500-3500mm+

· Applications: Cranes, excavators, military equipment, industrial turntables

· Precision: P0-P4 (industrial grade)

Precision Cross Roller Bearings (Not Our Primary Focus):

· Designation: RB/RA/RU/SX series

· Diameter: 40-800mm

· Applications: CNC machine tools, robots, medical devices

· Precision: P2-P5 (micron-level)

Luoyang Heng Guan specializes in the heavy-duty 11 series category, engineered for structural applications requiring large-diameter rotation support.

Application-Specific Performance

Crane Slewing Ring External Gear Crossed Roller

Cross Roller Slewing Ring Bearing is the preferred choice for truck cranes, tower cranes, and marine cranes where boom rotation accuracy and structural rigidity are critical. The crossed roller design eliminates the "ball skidding" issue common in four-point contact ball bearings during partial-load operation, ensuring smooth boom control at all extension lengths. External gear configurations (111/112 series) enable direct drive integration with hydraulic motors or gearboxes.

Cross Roller Slewing Bearing for Excavator

For medium to large hydraulic excavators (20-50 ton class), heavy duty cross roller slewing bearing provides the combination of high rigidity, compact envelope, and precise rotation control required for digging and loading cycles. Internal gear configuration (113/114 series) is most common, protecting the gear teeth from debris while maintaining optimal power transmission efficiency. This design is ideal as a slew ring for material handler applications including the Terex Fuchs MHL350 slewing bearing and similar equipment.

Military Equipment

Radar antenna turntables, missile launcher platforms, and armored vehicle turrets demand the highest rotational accuracy and zero-clearance performance. Cross roller slewing bearings with precision-ground raceways (P4 grade) are the standard choice for military applications. The rigid structure prevents aiming drift under thermal expansion and shock loads.

Test Platforms & Precision Turntables

Industrial test rigs, welding positioners, and large-scale precision rotary tables rely on precision crossed roller turntable bearing for their combination of high load capacity and sub-millimeter rotational accuracy. The 110 series (without gear) is typical for passive rotation applications where external drive mechanisms are employed.

Specialized Equipment Applications

Our product also serves in:

· Aerial platform slewing ring: Boom lifts and scissor lifts requiring stable rotation at elevated positions

· Robot cross roller slewing ring: Industrial manipulators and automated assembly systems

· Solar tracker slewing bearing cross roller: Dual-axis tracking frames for photovoltaic panels

· Wind turbine yaw bearing cross roller: Nacelle orientation systems for turbines up to 3MW capacity

· Medical equipment slewing ring cross roller: CT scanner gantries and surgical positioning devices

Manufacturing Capabilities and Quality Control

Luoyang Heng Guan Bearing Technology operates ISO 9001-certified production facilities in Luoyang, China's bearing manufacturing hub. Our engineering team of 50+ specialists brings over 30 years of collective experience in slewing bearing design and metallurgy.

Production Equipment:

· CNC vertical lathes for raceway precision machining

· CNC induction hardening systems for controlled heat treatment

· CNC gear shapers for tooth profile accuracy

· Coordinate measuring machines for dimensional verification

· Large-scale hobbing machines for gears up to 6000mm

Material Traceability: Every bearing component undergoes full traceability from raw material certification through final inspection. Heat treatment parameters are recorded and matched to batch numbers for quality assurance.

Testing Standards: Bearings are subject to geometric accuracy verification (ISO 1328 gear standards), hardness testing (Rockwell C scale), and rotational torque measurement before shipment.

Delivery Schedule: In-stock products ship within 7-15 days. Custom setups take 4-6 weeks, depending on intricacy.

FAQ

Q: What is the difference between cross roller slewing bearing and single row ball slewing bearing?

A: The key difference is the rolling element: cross roller uses cylindrical rollers in 90° crossed arrangement, while single row ball uses steel balls in four-point contact. Cross roller provides 30-50% higher rigidity and better rotational accuracy, but has slightly lower load capacity at the same size. Choose cross roller when rigidity and precision are priorities; choose ball type when cost and maximum load capacity are priorities.

Q: What do the series numbers 110, 111, 112, 113, 114 mean?

A: These are Chinese standard designations for cross roller slewing bearings: 110 = without gear, 111 = external gear (type A), 112 = external gear (type B), 113 = internal gear (type A), 114 = internal gear (type B). Types A and B differ in gear module selection for the same bearing diameter.

Q: What is the HJ series cross roller slewing ring?

A: The HJ series is the international designation for single row cross roller slewing bearings, equivalent to China's 11 series. Our 11 series bearings are dimensionally interchangeable with HJ series bearings, ensuring global compatibility.

Q: Are cross roller slewing bearings suitable for crane applications?

A: Yes. They are widely used in truck cranes, tower cranes, and marine cranes where boom control precision and structural rigidity are essential. They offer smoother rotation than ball-type bearings, especially during partial-load operation.

Contact Us

For technical specifications, dimensional drawings, or application engineering support regarding Cross Roller Slewing Ring Bearing solutions, reach our engineering team at mia@hgb-bearing.com. Provide your equipment model, load requirements, and mounting dimensions to receive precise recommendations.