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THK RA4
Cross Roller Bearing
THK RA4
Cross Roller Bearing
THK RA4 cross roller bearing, 4x12x3mm. Ultra-compact thin-section bearing with rollers arranged at 90 degrees for high rigidity in limited space.
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THK RA4 cross roller bearing, 4x12x3mm. Ultra-compact thin-section bearing with rollers arranged at 90 degrees for high rigidity in limited space.
Price Match Promise
Found it cheaper elsewhere? We’ll match any UK competitor’s price on bearings in stock — call us before you buy.
Technical Dimensions & Load Ratings
Confirm these values match your shaft, housing and application requirements before ordering.
Dimensions
| Bore Diameter (d) | 4mm |
| Outer Diameter (D) | 12mm |
| Width (B) | 3mm |
THK RA4
Cross Roller Bearing
Technical Specifications
| Part Number | THK RA4 |
| Brand | THK |
| Bearing Type | Cross Roller Bearing |
| Seal Type | Open |
| Bore (Inner Diameter) | 4 mm |
| Outer Diameter | 12 mm |
| Width / Thickness | 3 mm |
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Technical Datasheet
Download full specifications for THK RA4 — dimensions, load ratings, and material data.
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About the THK THK RA4
The THK THK RA4, is a cross roller bearing, in an open configuration for maximum speed and easy relubrication, featuring a 4mm bore, 12mm outer diameter, and 3mm width, and is in stock at Buy Bearings.
THK RA4 cross roller bearing, 4x12x3mm. Ultra-compact thin-section bearing with rollers arranged at 90 degrees for high rigidity in limited space.
Key Specifications
The THK RA4 cross roller bearing is specified with 4mm bore (inner diameter), 12mm outer diameter, 3mm width. The Open sealing arrangement protects against contamination and retains lubricant for extended service life.
Common Applications
Cross Roller Bearings are commonly used in:
Why Buy the THK RA4 from Buy Bearings?
- UK-authorised distributor with genuine THK products
- Expert technical support from our engineering team
- Competitive pricing with fast UK dispatch
- Full technical datasheet and cross-reference support
- 30-day returns on standard products
Frequently Asked Questions
What is a THK RA4 bearing?
The THK RA4 is a THK Cross Roller Bearing with a 4mm bore, 12mm outer diameter and 3mm width. It is In Stock at Buy Bearings.
What are the THK RA4 dimensions?
The THK RA4 measures 4mm bore (inner diameter) × 12mm outer diameter × 3mm width.
What does Open mean on a bearing?
Open bearings have no seals or shields, allowing maximum speed and easy relubrication — best for clean, lubricated environments.
Is the THK RA4 in stock?
The THK RA4 is In Stock at Buy Bearings. Submit an enquiry or call our sales team for current stock and pricing (POA).