6203 Deep Groove Ball Bearings 17x40x12mm | ZZ RS 2RS

JARBLUE 6203 Deep Groove Ball Bearings – Precision Engineered for Smooth, Reliable Performance

Upgrade your machinery and equipment with the JARBLUE 6203 Deep Groove Ball Bearings. Available in a convenient 1-piece or 3-piece set, these versatile bearings are engineered to deliver consistent, low-friction rotation across a wide range of applications. Whether you're maintaining motors, pumps, bicycles, power tools, or industrial equipment, these bearings offer the performance and durability you need.

Key Features

• Multiple Shield/Seal Options: Available in 6203, 6203Z, 6203ZZ, 6203RS, 6203-2RS, 6203RZ, and 6203-2RZ configurations — choose open, single-shielded, double-shielded, or rubber-sealed variants for your specific application.
• Precision Dimensions: 17mm inner diameter × 40mm outer diameter × 12mm width — a standard metric size compatible with a vast range of equipment.
• High-Quality Construction: Manufactured to standard tolerances with a surface roughness of Ra 0.05 for quiet, smooth operation and extended service life.
• CE Certified: Meets CE certification standards, ensuring quality and safety compliance.
• Versatile Use: Ideal for electric motors, skateboards, bicycles, power tools, water pumps, conveyor systems, and general industrial machinery.
• Value Pack: Choose a single bearing or a 3-piece set to keep spares on hand for maintenance and repair.

Specifications

What's in the Box?

• 1 or 3 × JARBLUE 6203 Deep Groove Ball Bearing (as selected)

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Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What is the difference between 6203ZZ and 6203RS deep groove ball bearings?

A: The 6203ZZ (or 6203-2Z) features metal shields on both sides, which protect the internal components from dust and debris while allowing slight lubrication access. The 6203RS (or 6203-2RS) has rubber seals on both sides, offering better protection against moisture and contaminants — making it ideal for wet or dusty environments. Both share the same 17×40×12mm dimensions.

Q: What applications are 6203 deep groove ball bearings commonly used for?

A: The 6203 series deep groove ball bearings are one of the most widely used bearing sizes worldwide. They are commonly found in electric motors, bicycles, skateboards, power tools, water pumps, lawnmowers, fans, conveyor systems, and general industrial machinery that requires smooth, low-friction rotation.

Q: Are these bearings pre-lubricated?

A: Yes, the shielded (ZZ) and sealed (RS/2RS/RZ/2RZ) variants come pre-greased from the factory, making them ready to install straight out of the box. The open (6203) version may require lubrication upon installation depending on your specific application requirements.

Q: Will a 6203 bearing fit my machine if it currently uses a different suffix, such as 6203-2Z?

A: Yes — all 6203 variants (6203, 6203Z, 6203ZZ, 6203-2Z, 6203RS, 6203-2RS, 6203RZ, 6203-2RZ) share the same core dimensions of 17mm × 40mm × 12mm. The suffix only indicates the shield or seal type, not the physical size. Always verify your application's clearance and sealing needs when selecting a variant.

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.