What Is an RD 800 slewing bearing? Buyer’s Selection Guide
Buying a slewing bearing is easier when you know exactly what you are looking at, and the RD 800 slewing bearing is a model that many buyers want to understand before they request a quotation. It supports rotating equipment that needs to handle combined weights and rotate smoothly and correctly. Heng Guan Bearing produces slewing bearings for lifting, construction, port, wind power, and automation equipment. This book describes the main structural elements, the variations between the kinds of gear, how to pick by load and dimensions, and what requirements to check before you purchase.
What Are the Key Structural Features of an RD 800 Slewing Bearing?
The RD 800 slewing bearing is a single-row cross roller bearing. The rollers are cylindrical and are located between two rings on V-shaped raceways, with each roller rotated 90° to its neighbor, producing an X pattern. This configuration allows one slewing bearing to take axial force, radial force, and tilting moment simultaneously and hence replace a combination of numerous independent bearings while keeping the housing small.
Both rings include mounting holes so the bearing may be easily bolted between the base and the rotating structure, and a cage maintains the rollers consistently spaced while seals protect the raceway from dust and moisture. The RD 800 slewing bearing is made by Heng Guan Bearing with rings of forged 42CrMo alloy steel and precision-ground raceways, so that the rotation is smooth and stable in everyday use. The essential data is summarized in the table below.
Technical Specifications
| Parameter | Specification |
|---|---|
| Structure | Single-row crossed roller (X-pattern, 90° arrangement) |
| Standard models | 72 (36 external gear + 36 internal gear) |
| Raceway diameter range | 400 – 3,000 mm |
| Height range | 55 – 130 mm |
| Weight range | 31 – 1,733 kg |
| Roller diameter classes | Ø16 – Ø50 mm (eight classes) |
| Ring material | Forged 42CrMo alloy steel |
| Roller material | Vacuum-degassed GCr15 |
| Raceway hardness | 55 – 62 HRC, induction hardened |
| Friction coefficient | Approximately 0.004 |
| Precision grades | P0, P6, P5, P4 |
| Gear configurations | Gearless, external gear, internal gear |
What Are the Differences Between Internal Gear, External Gear, and Gearless RD 800 Slewing Bearings?
The gear option decides how the bearing is driven, so it deserves attention early in the selection process.
External Gear
An external gear RD 800 slewing bearing carries teeth on the outer ring, which suits machines where the pinion sits outside, and maintenance access is easy. In the RD 800 range, these are the 161 series.
Internal Gear
An internal gear version places the teeth on the inner ring, giving a more compact and protected drive. These are the 162 series.
Gearless
A gearless slewing bearing has no teeth and works well when rotation comes from another mechanism, such as a hydraulic motor or a separate drive.
Heng Guan Bearing can supply all three options and adapt the module and tooth count to your drive. The table below compares them.
| Type | Teeth Location | Typical Advantage |
|---|---|---|
| External gear (161 series) | Outer ring | Easy access and maintenance |
| Internal gear (162 series) | Inner ring | Compact, protected drive |
| Gearless | None | Flexible drive design |
How to Select the Right RD 800 Slewing Bearing Based on Load Capacity and Dimensions?
The circumstances in which your machine will be used are the starting point for the selection. Axial load, radial load, and tilt moment. Rotation speed. Duty cycle. Step 4: Compare with the capacity of the RD 800 slewing bearing.
Next, verify the installation area, including the outer diameter, inner diameter, and section height. Ensure the mounting hole configuration suits your structure. The RD 800 series is organized by roller size; thus, the table below provides a fast starting point. The slew bearing will be sized to the load and envelope, and will revolve smoothly, keeping the bolts equally strained.
If you are confused about how to determine the load case, our experts can assist. Send your machine data to mia@hgb-bearing.com, and Heng Guan Bearing will recommend a suitable size and structure. Stock items typically ship in 7–15 days, and custom builds take about 4–6 weeks. The table below lists the main selection inputs.
| Selection Input | Why It Matters |
|---|---|
| Axial, radial, and moment loads | Determines bearing capacity |
| Installation space | Defines diameter and height |
| Mounting hole layout | Ensures correct fit |
| Rotation speed and duty | Guides structure choice |
The roller classes below show how size and height change across the range.
| Roller Class (External / Internal) | Roller Ø | Raceway Diameter (mm) | Height H (mm) |
|---|---|---|---|
| 161.16 / 162.16 | 16 mm | 400 – 630 | 55 |
| 161.20 / 162.20 | 20 mm | 450 – 710 | 62 |
| 161.25 / 162.25 | 25 mm | 764 – 1,320 | 73 |
| 161.28 / 162.28 | 28 mm | 1,400 – 1,700 | 80 |
| 161.36 / 162.36 | 36 mm | 1,700 – 2,000 | 100 |
| 161.40 / 162.40 | 40 mm | 2,000 – 2,368 | 108 |
| 161.45 / 162.45 | 45 mm | 2,240 – 2,654 | 119 |
| 161.50 / 162.50 | 50 mm | 2,500 – 3,000 | 130 |
Which Technical Specifications Should Buyers Verify Before Purchasing an RD 800 Slewing Bearing?
Please verify the details that determine fit and long-term performance before ordering. Check outer diameter, inner diameter, height, mounting hole design, and gear characteristics against your drawing.
Ask about the ring material (in this series, it’s forged 42CrMo alloy steel). Ask for hardness data on the raceways and teeth. Confirm the precision grade (P0, P6, P5, and P4 at Heng Guan Bearing), and inquire about sealing and lubrication. A good provider will give you inspection records, answer technical questions effectively, and ensure that your RD 800 slewing bearing is ready to install. Verify all final values with the supplier's design before ordering.
| Check Item | What to Ask For |
|---|---|
| Ring and roller material | Material certificate with heat-number traceability |
| Raceway hardness | Hardness report (55 – 62 HRC) |
| Rotation quality | Runout report |
| Dimensions and gear data | Drawing with CAD model (DWG / STEP) |
Conclusion
The RD 800 slewing bearing offers compact, dependable rotary support when the gear type, load capacity, and dimensions match your machine. Checking specifications before ordering prevents costly mistakes. Heng Guan Bearing is ready to guide your selection.
FAQ
Q: What does an RD 800 slewing bearing do?
A: It supports rotating equipment and carries axial, radial, and moment loads together.
Q: Which gear types are available?
A: External gear (161 series), internal gear (162 series), and gearless versions.
Q: How do I choose the right size?
A: Compare your loads and installation space with the bearing’s capacity and dimensions. The standard range covers raceway diameters from 400 to 3,000 mm.
Q: Which materials are used?
A: The rings are forged from 42CrMo alloy steel, with vacuum-degassed GCr15 rollers.
Q: Can the bearing be customized?
A: Yes, gear parameters and mounting layout can be adapted to your design.
Ready to Choose Your RD 800 Slewing Bearing? Contact Heng Guan Bearing Today
Need help selecting the right RD 800 slewing bearing? Contact Heng Guan Bearing for a tailored solution:
- Slewing bearings from 50 mm to 10,000 mm, P0–P4 precision
- ISO 9001-certified production, custom sizing and gear options
- Engineering support for load analysis, bearing selection and installation guidance
- Material certificates, runout reports and CAD models with every quotation
Send your drawings and working conditions to Heng Guan Bearing at mia@hgb-bearing.com, and our engineers will recommend the best solution and provide a clear quotation. Contact Us today and let us support your project.
References
1. International Organization for Standardization. (2006). ISO 76:2006. Rolling Bearings: Static Load Ratings.
2. International Organization for Standardization. (2007). ISO 281:2007. Rolling Bearings: Dynamic Load Ratings and Rating Life.
3. International Organization for Standardization. (2014). ISO 683-17:2014. Heat-Treated Steels, Alloy Steels and Free-Cutting Steels: Ball and Roller Bearing Steels.
4. International Organization for Standardization. (2017). ISO 15243:2017. Rolling Bearings: Damage and Failures, Terms, Characteristics and Causes.
5. Harris, T. A., & Kotzalas, M. N. (2006). Rolling Bearing Analysis: Essential Concepts of Bearing Technology (5th ed.). CRC Press.
6. Budynas, R. G., & Nisbett, J. K. Shigley’s Mechanical Engineering Design. McGraw-Hill.
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