JARBLUE RC Unidirectional Needle Roller Bearings – 5 or 10 Pcs

JARBLUE Unidirectional Needle Roller Bearings – RC Series (5 or 10 Pieces)

Upgrade your mechanical assemblies with JARBLUE RC-Series Unidirectional Needle Roller Bearings. Engineered from high-grade bearing steel, these one-way needle roller bearings deliver smooth, reliable torque transmission in a single rotational direction — making them ideal for ratcheting mechanisms, overrunning clutches, conveyor systems, power tools, and precision machinery applications.

Available in a convenient 5-piece or 10-piece set, these bearings are offered in multiple size models to suit a range of shaft dimensions:

• RC040708 – 4 × 7 × 8 mm
• RC061008 – 6 × 10 × 8 mm
• RC081208 – 8 × 12 × 8 mm
• RC101410 – 10 × 14 × 10 mm

Key Features

• Bearing Steel Construction: Hardened bearing steel ensures exceptional durability, high load capacity, and long service life even under demanding conditions.
• Unidirectional (One-Way) Design: Allows free rotation in one direction while locking in the opposite direction — perfect for indexing, backstop, and clutch applications.
• CE & RoHS Certified: Meets international quality and safety standards; free from high-concern chemicals for safe handling and use.
• Compact Needle Roller Profile: Slim, space-saving form factor fits into tight housings without sacrificing load-bearing performance.
• Multiple Size Options: Choose the model that matches your exact shaft and housing requirements for a precise, secure fit.
• Multi-Pack Value: Available in 5-piece or 10-piece quantities — ideal for repair kits, prototyping, or production line stock.

Specifications

Ideal Applications

• Overrunning clutches and backstop mechanisms
• Ratchet drives and indexing systems
• Power tools and hand tools
• Automotive and industrial machinery
• Conveyor and automation equipment
• DIY mechanical builds and hobby engineering

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Frequently Asked Questions

Q: What does "unidirectional" mean in a needle roller bearing?

A: A unidirectional (one-way) needle roller bearing is designed to transmit torque in only one rotational direction. When rotated in the free direction, the inner race spins independently; when rotated in the locked direction, the needle rollers engage and lock the inner and outer races together. This makes RC-series bearings ideal for ratcheting, clutch, and backstop mechanisms.

Q: How do I choose the correct RC bearing model size?

A: Each RC model number encodes the bearing dimensions. For example, RC040708 has a 4 mm bore (inner diameter), 7 mm outer diameter, and 8 mm width. Match the bore to your shaft diameter and the outer diameter to your housing bore. Select the model — RC040708, RC061008, RC081208, or RC101410 — that fits your specific shaft and housing measurements.

Q: Are these bearings suitable for high-speed or heavy-load applications?

A: These JARBLUE RC-series bearings are made from hardened bearing steel, offering good load capacity and durability for light to moderate industrial, power-tool, and DIY applications. For heavy-duty, high-speed, or continuous industrial use, consult the specific load and speed ratings for your chosen model size before installation.

Q: What is the difference between the 5-piece and 10-piece options?

A: Both options contain the same high-quality JARBLUE RC-series needle roller bearings. The 5-piece set is great for smaller repairs or prototyping, while the 10-piece set offers better value for production use, stocking spare parts, or larger projects requiring multiple bearings.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.