Hyundai excavator slew bearing
OEM-fit dimensions for direct replacement
Premium 50Mn / 42CrMo forged steel construction
Hardened raceways (HRC55–62) for longer service life
High load capacity and excellent wear resistance
Available from stock with custom manufacturing support
- Product Description
Hyundai Excavator Slew Bearing – Direct Replacement Solution from Luoyang Heng Guan Bearing
We supply direct-fit Slewing Bearings designed specifically for Hyundai excavators at Luoyang Heng Guan Bearing Technology. Our Hyundai excavator slew bearing products cover the full model range from 6-ton mini excavators to 90-ton heavy-duty machines. Whether you're operating a Hyundai R60 on urban construction sites or running an R450 in mining operations, our bearings deliver the load capacity, rotational precision, and durability your equipment demands. Each bearing is manufactured to exact dimensional tolerances that match OEM mounting specifications, ensuring straightforward installation without modification.
Need urgent delivery or custom specs? Contact our engineering team: mia@hgb-bearing.com
What Makes a Slewing Bearing Critical in Hyundai Excavators?
The slewing bearing interfaces the excavator’s upper structure to the undercarriage, supporting axial loads, radial forces, and tilting moments amid operation.
For Hyundai excavators, it guarantees smooth 360° revolution and exact development under load. A solid bearing keeps up efficiency, whereas intemperate wear can lead to downtime and harm to encompassing components.



Technical Specifications
Parameter | Specification Range |
Outer Diameter | 400mm – 2800mm |
Bore Diameter | 280mm – 2400mm |
Height | 65mm – 280mm |
Raceway Hardness | HRC 55-62 |
Gear Module (if applicable) | M4 – M16 |
Precision Grade | P0 / P6 / P5 / P4 |
Material | 50Mn / 42CrMo alloy steel |
Structure Types | Single-row ball / Cross-roller / Three-row roller |
Load Capacity | Varies by model (consult for specific ratings) |
Operating Temperature Range | -30°C to +80°C |
HYUNDAI Model Product Parameters
Model | Part Number | Outer Diameter | Inside Diameter | Total height | Outer Height | Inner Height | Outer Hole Parameters | Inner Hole Parameters | Number of Teeth |
R140LC-7 | 81N4-01020 | 1196 | 963 | 90 | 79 | 80 | 36-φ19 | 36-M16*1.5 | 98 |
R210LC-3 | 81EM-00020 | 1202 | 945 | 84 | 75 | 70 | 36 | 36 | 80 |
R170W-7 | 81EM-00021 | 1202 | 947 | 83 | 75 | 70 | 36-φ22 | 36-M20*1.5 | 80 |
R180W-9S | 81EM-00021GG | 1202 | 947 | 83 | 75 | 70 | 36-φ22 | 36-M20*1.5 | 80 |
R200W-7 | 81EM-00021GG | 1327 | 1083 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R210-7 | 81N6-00023BG | 1327 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R210LC-7 | 81N6-01020 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R210-7 | 81N6-00022 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R210-7 | 81N6-00021 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R210LC7 | 31N 812020 | 1326 | 1084 | 110 | 89 | 94 | 30-Φ22 | 36-M20 | 92 |
R210W-9S | 81Q5-01020 | 1327 | 1083 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R210W-9S | 81Q5-01021 | 1327 | 1083 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R220LC-9S | 81Q6-00020 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R220LC-9S | 81Q6-01020 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R220LC-9S | 81Q6-01021 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R220LC-9S | 81Q6-00021 | 1326 | 1084 | 110 | 89 | 94 | 30-φ22 | 36-M20 | 92 |
R250LC-7 | 81EN-00052 | 1410 | 1131 | 120 | 88 | 110 | 34-φ23 | 36-M20 | 82 |
290LC-7 | 81N8-0003 | 1526 | 1235 | 123 | 97 | 110 | 38-φ26 | 40-M24 | 90 |
R290 | 81N8-00021 | 1526 | 1235 | 122 | 87 | 110 | 37-Ф26 | 40-M24 | 90 |
R290 | 81N8-00022 | 1526 | 1235 | 122 | 87 | 110 | 37-Ф26 | 40-M24 | 90 |
R290LC 7A | 4921797 | 1526 | 1235 | 123 | 97 | 110 | 38-φ26 | 40-M24 | 90 |
R290LC-7 | 81N8-00023 | 1526 | 1235 | 123 | 97 | 110 | 38-φ26 | 40-M24 | 90 |
R290LC-7A | 81N8-00024GG | 1526 | 1235 | 122 | 97 | 110 | 38-φ26 | 40-M24 | 90 |
R320-7 | 81N9-01020 | 1526 | 1235 | 122 | 97 | 110 | 38-Ф26 | 40-M24 | 90 |
R320LC-7 | 81N9-01021 | 1526 | 1235 | 122 | 97 | 110 | 38-Ф26 | 40-M24 | 90 |
R320LC-7 | 81N9-01022 | 1526 | 1235 | 122 | 97 | 110 | 38-Ф26 | 40-M24 | 90 |
R320LC-7 | 81n9-01022 BG | 1526 | 1235 | 122 | 97 | 110 | 38-Ф26 | 40-M24 | 90 |
R320LC-7 | 81N9-00021 | 1526 | 1235 | 122 | 97 | 110 | 38 | 40 | 90 |
R360LC-7 | 81NA-01020 | 1550 | 1250 | 108 | 140 | 35 | 40 | 106 | |
R360LC-7 | 81NA-01022GG | 1550 | 1250 | 152 | 108 | 140 | 35 | 40 | 106 |
R360LC-7A | 81NA-01021BG | 1550 | 1250 | 152 | 108 | 140 | 35 | 40 | 106 |
Available Structural Configurations
Single-Row Four-Point Contact Ball Design
This plan employs exactness balls with four-point raceway contact, giving smooth, low-friction rotation and precise positioning.
Benefits: Lower vibration, decreased control utilization, and longer seal life. Perfect for common excavation and light pulverization applications.
Single-Row Cross-Roller and Three-Row Roller Design
Cross-roller bearings use alternating cylindrical rollers to maximize contact area, while three-row designs improve load distribution.
Benefits: Higher load capacity, greater rigidity, and better shock resistance. Ideal for mining, quarrying, demolition, and other heavy-duty Hyundai excavator applications.

Manufacturing Standards at Heng Guan Bearing
Material Selection and Heat Treatment
We manufacture inner and outer rings from 50Mn or 42CrMo alloy steel. Forging refines the grain structure, while induction hardening produces HRC55–62 raceway hardness for excellent wear and fatigue resistance.
The hardened structure also maintains dimensional stability under thermal cycling and operating friction.
Precision Machining and Quality Control
Our CNC machining centers ensure accurate fit with Hyundai mounting interfaces. Dimensions are verified by coordinate measuring machines, and rotational torque is tested before shipment.
Production equipment includes CNC heat-treatment, gear hobbing, and precision grinding systems for high-quality raceway finishing.
Why Choose Heng Guan Bearing for Your Hyundai Fleet
Complete model coverage:We maintain dimensional data for Hyundai excavators from compact R35 and R55 models through mid-size R210 and R300 machines to large R520 and R800 units. If you need a Hyundai excavator slew bearing replacement, we likely have the specification on file.
Custom engineering: We customize gear teeth, seals, load ratings, and mounting configurations to meet specific needs.
Flexible ordering: Stock sizes ship quickly, and custom bearings are available with reasonable lead times for both single-unit and bulk orders.
Standards compliance: ISO9001-certified, DIN/ISO-compliant, and RoHS-compliant. Our bearings are supplied to customers in over 50 countries.

Frequently Asked Questions
Q: How do I recognize the correct bearing for my Hyundai excavator?
Check the demonstrate plate on your machine for the correct details number (case: R220LC-9). You can moreover degree the external breadth, jolt gap circle distance across, and number of mounting gaps on your existing bearing. Send these subtle elements to us, and we'll affirm the adjust substitution specification.
Q: What's the commonplace benefit life of your slewing bearings?
Service life depends on working conditions, upkeep hones, and stack concentrated. Beneath ordinary development use with legitimate grease, anticipate 8,000-12,000 working hours. Heavy-duty applications like devastation or mining may require substitution at 5,000-8,000 hours.
Q: Do you supply Bearing with inner or outside gears?
We fabricate both arrangements. Most Hyundai excavators use outside Gear courses of action where the slew drive pinion networks with teeth cut on the bearing's external ring. Affirm your machine's setup some time recently requesting.
Q: Can you reverse-engineer a bearing from my old unit?
Yes. Ship us your worn bearing, and our engineering team will measure all critical dimensions, tooth profiles, and hole patterns. We'll produce detailed drawings for your approval before manufacturing the replacement. This service helps when documentation for older machines isn't available.
Q: What's your typical delivery time?
Stock items ship within 3-5 business days. Custom bearings require 25-35 days depending on size and complexity. Rush orders may be accommodated—Contact Us to discuss your timeline.
Q: What testing do you perform before shipment?
Every product undergoes dimensional verification, raceway hardness testing, rotational torque measurement, and gear tooth profile inspection. We provide test reports with each order documenting these results.
Get Technical Support for Your Hyundai Equipment
Contact us at mia@hgb-bearing.com with your hyundai excavator slew bearing model number, operating conditions, and any specific requirements.














