6903-2RS Thin Section Ball Bearings 17x30x7mm ABEC-1 – 60 Pack

$109.30 $146.98

6903-2RS Thin Section Deep Groove Ball Bearings – 60-Piece Pack

Upgrade your mechanical assemblies with this value-packed set of 60 × 6903-2RS deep groove ball bearings. With a compact 17 × 30 × 7 mm profile, these thin-section bearings are engineered for applications where space is limited but performance cannot be compromised. Each bearing is manufactured to ABEC-1 tolerance from high-quality bearing steel, offering smooth, consistent rotation across a wide range of equipment.

Key Features

Model: 6903-2RS / 6903RS / 61903
Type: Deep Groove Ball Bearing
Dimensions: 17 mm (ID) × 30 mm (OD) × 7 mm (Width)
Tolerance Grade: ABEC-1
Closure: Double-sealed (2RS) on both sides for maximum contamination resistance
Lubrication: Pre-packed with grease – self-lubricated and ready to install
Material: Premium bearing steel
Finish: Silver chrome
Quantity: 60 bearings per pack

Why Choose 6903-2RS Double-Sealed Bearings?

The double rubber seal (2RS) keeps lubricating grease in and dust, dirt, and moisture out — extending service life and reducing maintenance intervals. The thin-section design makes these ideal for compact gearboxes, robotics, power tools, cycling components, and any application where axial space is at a premium. With 60 pieces in one order, you'll have spares on hand for maintenance kits, batch builds, or repair workshops.

Typical Applications

Electric motors and generators
Power tools and hand tools
Bicycles, e-bikes, and inline skates
Robotics and automation equipment
Pumps, fans, and conveyors
3D printers and CNC machines

Package Contents

60 × 6903-2RS Deep Groove Ball Bearings (17 × 30 × 7 mm)

Note: Due to lighting conditions and display variation, the colour of the item in photos may appear slightly different from the actual product. Dimensional measurement tolerance is ±1–3 mm.

Made in Mainland China.

Frequently Asked Questions

Q: What does the "2RS" designation mean on a 6903-2RS bearing?

A: "2RS" stands for double rubber sealed. Both sides of the bearing are fitted with rubber contact seals that keep the pre-packed grease inside and prevent dust, dirt, and moisture from entering. This makes 6903-2RS bearings maintenance-friendly and suitable for moderately contaminated environments.

Q: What is the bore, outer diameter, and width of the 6903-2RS bearing?

A: The 6903-2RS thin section ball bearing has an inner bore (ID) of 17 mm, an outer diameter (OD) of 30 mm, and a width of 7 mm. These compact dimensions make it ideal for space-constrained mechanical designs.

Q: Are these bearings pre-lubricated, or do I need to grease them before installation?

A: These bearings come pre-packed with grease and are fully self-lubricated straight out of the pack. The double-rubber seals retain the grease, so in most standard applications no additional lubrication is required before installation.

Q: What is ABEC-1 tolerance and is it sufficient for my application?

A: ABEC-1 is the most common industrial tolerance grade, offering reliable performance for general-purpose machinery, power tools, bicycles, pumps, and similar equipment. If your application demands very high rotational speeds or extreme precision (e.g. aerospace or medical-grade spindles), a higher ABEC grade may be more appropriate.

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.