THK RB15025UUCC0P5 Cross Roller Ring
The RB15025UUCC0P5 is a basic‑type crossed roller bearing designed for high‑precision inner‑ring rotation applications. It features a separable outer ring and an integrated inner ring, with cylindrical rollers arranged perpendicularly in 90° V‑groove raceways (via spacer retainers) to simultaneously support radial, axial, and moment loads.
The RB15025UUCC0P5 is a basic‑type crossed roller bearing designed for high‑precision inner‑ring rotation applications. It features a separable outer ring and an integrated inner ring, with cylindrical rollers arranged perpendicularly in 90° V‑groove raceways (via spacer retainers) to simultaneously support radial, axial, and moment loads. This model is factory‑equipped with double rubber seals (UU), normal internal preload (CC0), and P5 ultra‑precision accuracy, delivering exceptional rigidity (3–4× that of conventional double‑row thin angular contact bearings) and stable low‑torque performance.
Official Technical Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Model | RB15025UUCC0P5 | — | UU=double seals; CC0=preload; P5=precision class |
| Inner Diameter (d) | 150 | mm | Integrated inner ring |
| Outer Diameter (D) | 210 | mm | Separable outer ring (1‑piece split) |
| Width (B) | 25 | mm | Total bearing width |
| Roller Pitch Circle Diameter (dp) | 178 | mm | Official design value |
| Shoulder Height (a / b) | 3.5 / 2.0 | mm | Mounting reference |
| Minimum Chamfer (r₁ min) | 1.5 | mm | Inner/outer ring chamfer |
| Shaft Fit Dia. (ds max) | 164 | mm | Maximum shaft diameter for fit |
| Housing Fit Dia. (Dh min) | 194 | mm | Minimum housing bore diameter |
| Radial Dynamic Load Rating (C) | 76.8 | kN | THK standard rating |
| Radial Static Load Rating (C₀) | 128 | kN | THK standard rating |
| Mass | 3.16 | kg | Exact factory net weight |
| Accuracy Class | P5 | — | Ultra‑precision for rotation accuracy |
| Internal Clearance | CC0 | — | Preload (ISO standard) |
| Sealing | UU | — | Double rubber contact seals (both sides) |
| Lubrication | Grease | — | Factory‑filled with THK‑specified grease |
Key Design Features
- High Rigidity: Crossed roller arrangement with full‑length spacer retainers eliminates roller skewing, providing 3–4× higher rigidity than conventional bearings.
- Precision Performance: P5 class ensures minimal runout and repeatability for inner‑ring rotation; CC0 preload suits high‑precision applications requiring stiffness.
- Contamination Protection: UU double seals prevent dust and debris from entering the raceway, extending service life in industrial environments.
- Easy Installation: Separable outer ring (secured with assembly screws) simplifies mounting and alignment; no presser flange required for basic installations.
- Low Torque: Spacer retainers reduce roller friction, ensuring stable, low rotational torque even under light loads.
Typical Applications
- Industrial robot joints and swivel units
- Machine tool index tables and rotary stages
- Precision rotary worktables
- Medical equipment and measuring instruments
- Semiconductor/IC manufacturing machinery
Model Decoding (THK Standard)
| Code | Meaning |
|---|---|
| RB | Basic type (separable outer ring, inner ring rotation) |
| 150 | Inner diameter = 150 mm |
| 25 | Width = 25 mm |
| UU | Double rubber seals (both sides) |
| CC0 | Normal internal preload (non‑clearance) |
| P5 | Precision class (ISO P5) |
