RB7013UUC0 is a basic‑type cross‑roller ring (Cross‑Roller Ring) from THK’s RB series, featuring a separable outer ring and one‑piece inner ring, optimized for inner‑ring rotation with high precision and rigidity. Cylindrical rollers are arranged perpendicularly in 90° V‑grooves via a precision spacer retainer, enabling the bearing to support radial, axial, and moment loads simultaneously in a compact profile. The model is factory‑equipped with double rubber contact seals (UU) and standard radial clearance (C0), ensuring contamination resistance and stable rotational performance.
Official Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Model | RB7013UUC0 | — |
| Inner Diameter (d) | 70 | mm |
| Outer Diameter (D) | 100 | mm |
| Width (B) | 13 | mm |
| Roller Pitch Circle Diameter (dp) | 84 | mm |
| Minimum Chamfer (rₘᵢₙ) | 0.6 | mm |
| Shaft Fit Diameter (dsₘₐₓ) | 77 | mm |
| Housing Fit Diameter (Dhₘᵢₙ) | 92 | mm |
| Greasing Hole (a) | 2.5 | mm |
| Greasing Hole (b) | 1.6 | mm |
| Basic Dynamic Load Rating (C) | 19.4 | kN |
| Basic Static Load Rating (C₀) | 27.7 | kN |
| Mass | 0.35 | kg |
| Internal Clearance | C0 | Standard radial clearance (THK normal clearance) |
| Seal Type | UU | Double rubber contact seals (both sides) |
| Retainer | Spacer retainer | Precision roller guidance |
| Lubrication | Lithium‑base Grease (No.2) | Factory‑filled, ready‑to‑use |
| Operating Temperature | -15°C to +80°C | Standard service range |
| Accuracy Class | P0 (PN2) | ISO 492 / ABEC 1 |
Key Design Features
- Separable Outer Ring: Split outer‑ring design enables high‑precision inner‑ring rotation, ideal for applications requiring stable rotary motion of the inner ring.
- Ultra‑High Rigidity: Crossed roller arrangement delivers 3–4× higher rigidity than conventional double‑row thin angular contact bearings in a compact footprint.
- Multi‑Directional Load Capacity: Single bearing supports radial, axial, and moment loads, simplifying mechanical design and reducing component count.
- Stable Low Torque: Spacer retainers prevent roller skewing and eliminate roller‑to‑roller friction, ensuring consistent, smooth rotation.
- Contamination Protection: UU double seals block dust, chips, and coolant ingress, extending service life in industrial environments.
- Easy Installation: Pre‑assembled with rollers and retainer for direct installation; separable outer ring simplifies mounting and preload adjustment.
- Standard Clearance (C0): Factory‑set radial clearance ensures smooth operation and consistent performance under varying loads.
Typical Applications
- Precision index tables and swivel units for machine tools (inner‑ring rotation)
- Industrial robot joints and end‑effector rotary stages
- Semiconductor manufacturing equipment (wafer handlers, inspection tools)
- Medical diagnostic and imaging equipment
- Optical positioning systems and precision automation modules
- Compact rotary actuators and lightweight robotic swiveling units
- Measuring instruments and precision rotary stages
Model Code Explanation (THK Standard)
| Code | Meaning |
|---|---|
| RB | Basic type, separable outer ring, inner‑ring rotation |
| 70 | Inner diameter = 70 mm |
| 13 | Width = 13 mm |
| UU | Double rubber contact seals (both sides) |
| C0 | Standard internal radial clearance (THK normal clearance) |
