IKO CRBT105AC1 Super Slim Cross Roller Bearing
CRBT105AC1 is an ultra‑slim, ultra‑small crossed roller bearing from IKO’s CRBT series, designed for extreme space‑constrained precision applications. It features cylindrical rollers alternately arranged at 90° between precision‑ground inner and outer rings, guided by a precision separator retainer.
CRBT105AC1 is an ultra‑slim, ultra‑small crossed roller bearing from IKO’s CRBT series, designed for extreme space‑constrained precision applications. It features cylindrical rollers alternately arranged at 90° between precision‑ground inner and outer rings, guided by a precision separator retainer. This design enables the bearing to support radial, axial, and moment loads simultaneously in an extremely compact form factor. The unit is factory‑equipped with separator‑type retainer (A) and C1 radial internal clearance, delivering exceptional rigidity, rotational accuracy, and minimal deflection.
Official Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Model | CRBT105AC1 | — |
| Inner Diameter (d) | 10 | mm |
| Outer Diameter (D) | 21 | mm |
| Width (B) | 5 | mm |
| Minimum Chamfer (rₘᵢₙ) | 0.15 | mm |
| Shaft Mounting Diameter (da) | 12.5 | mm |
| Housing Mounting Diameter (Da) | 17 | mm |
| Basic Dynamic Load Rating (C) | 1,120 | N |
| Basic Static Load Rating (C₀) | 811 | N |
| Mass | 9.0 | g (0.009 kg) |
| Retainer | Separator‑type (A) | Precision roller guidance |
| Internal Clearance | C1 | Small radial internal clearance |
| Material | High‑carbon chromium bearing steel (SUJ2) | — |
| Operating Temperature | -20°C to +110°C | Standard service range |
| Accuracy Class | JIS Class 0 (P0) | ISO 492 / ABEC 1 |
| Lubrication | Factory‑filled lithium‑base grease | Non‑relubricatable (no oil holes) |
| Structure | Integral inner/outer rings | Ultra‑slim one‑piece construction |
Key Design Features
- Ultra‑Slim & Ultra‑Small Profile: Compact dimensions (10×21×5 mm) for extreme space‑limited installations.
- Exceptional Rigidity: Crossed roller arrangement provides 3–4 times higher rigidity than double‑row angular contact ball bearings in the same envelope.
- Multi‑Directional Load Capacity: Single bearing supports radial, axial, and moment loads, simplifying system design.
- Precision Separator Retainer: Maintains roller alignment, reduces friction, and ensures stable rotational torque.
- C1 Clearance: Factory‑set small radial clearance guarantees high rotational accuracy and minimal backlash.
- Integral Ring Design: One‑piece inner/outer rings for enhanced rigidity and simplified mounting.
- Pre‑Greased: Factory‑lubricated for immediate use, no additional lubrication required.
Typical Applications
- Compact industrial robot joints and gripper mechanisms
- Miniature precision rotary tables and positioning stages
- Compact surveillance camera swivel assemblies
- Medical diagnostic and surgical equipment
- Optical and semiconductor manufacturing equipment
- High‑precision miniature automation modules
Model Code Explanation
| Code | Meaning |
|---|---|
| CRBT | Super Slim Type Crossed Roller Bearing |
| 10 | Inner diameter = 10 mm |
| 5 | Width = 5 mm |
| A | Separator‑type retainer |
| C1 | Small radial internal clearance |
