6203 2RS Deep Groove Ball Bearings 17x40x12mm – 4 Pack

Kande Bearings 6203 2RS Single Row Deep Groove Ball Bearings – 4 Pack

Upgrade your machinery and equipment with the Kande Bearings 6203 2RS Deep Groove Ball Bearings. This pack of 4 precision-engineered steel bearings features double-sided rubber seals to keep contaminants out and lubrication in, ensuring consistent, smooth rotation in demanding applications. Available in both ABEC-3 (economical, high-quality) and ABEC-5 (higher precision, professional-grade) quality ratings, you can select the performance tier that best suits your project requirements. Made in Mainland China.

Key Specifications

• Model: 6203 2RS / 6203RS / 6203RZ / 6203-2RS
• Dimensions: 17 × 40 × 12 mm (Inner Ø 17mm / Outer Ø 40mm / Width 12mm)
• Quality Grade: ABEC-3 or ABEC-5 (select your preferred grade)
• Material: Steel with Black Oxide coating
• Seal Type: Double-sided rubber (RS) seal
• Surface Roughness: Ra 0.8 (ABEC-3) / Ra 0.4 (ABEC-5)
• Net Weight: 0.067 kg per bearing
• Quantity: 4 pieces per pack
• Brand: Kande Bearings

Why Choose Kande 6203 2RS Bearings?

• Dual Quality Options: Choose ABEC-3 for a cost-effective, reliable solution or ABEC-5 for tighter tolerances and superior precision in high-performance applications.
• Double Rubber Seals: The RS rubber seal on both sides effectively blocks dust, dirt, and moisture, extending service life significantly.
• Black Oxide Finish: Provides added corrosion resistance for use in a variety of environments.
• Versatile Fit: Compatible with electric motors, skateboards, bicycles, garden equipment, pumps, and many other mechanical assemblies.
• Pack of 4: Great value — keep extras on hand for quick replacements and maintenance.

Typical Applications

• Electric motors & power tools
• Bicycles, scooters & skateboards
• Pumps & compressors
• Garden & lawn equipment
• Industrial machinery & conveyor systems
• DIY and hobby engineering projects

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Frequently Asked Questions

Q: What is the difference between the ABEC-3 and ABEC-5 6203 2RS bearings?

A: The ABEC-3 6203 2RS bearing is an economical, high-quality option ideal for general-purpose applications. The ABEC-5 6203 2RS bearing is manufactured to tighter dimensional tolerances, making it the preferred choice for higher-precision applications such as precision motors, pumps, and professional machinery where minimal runout and superior consistency are required.

Q: What do the dimensions 17×40×12mm mean for the 6203 2RS bearing?

A: These dimensions refer to the bearing's inner diameter (17mm), outer diameter (40mm), and width/thickness (12mm). When replacing or selecting a bearing, all three measurements must match your application's housing and shaft dimensions for a proper fit.

Q: Are these 6203 2RS bearings pre-lubricated?

A: Yes. The double-sided rubber (RS) seals on the Kande 6203 2RS bearings retain factory-applied grease lubrication inside, while simultaneously shielding the internal components from dust and moisture — making them ready to install straight from the pack in most standard applications.

Q: What equipment are 6203 2RS deep groove ball bearings compatible with?

A: The 6203 2RS is one of the most widely used bearing sizes in the world. It is compatible with electric motors, bicycle bottom brackets, skateboard wheels, power tools, garden equipment (such as lawn mowers and trimmers), small pumps, and a broad range of industrial and DIY machinery with a 17mm shaft diameter.

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.