R8, R8Z, R8ZZ, R8RS, R8-2RS Inch Deep Groove Ball Bearings 1/2"x1-1/8"x5/16" (12.7x28.575x7.938mm) – Miniature Sealed Bearings for Motors, Power Tools, Fans, Pumps & Light Industrial Equipment

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R8, R8Z, R8ZZ, R8RS, R8-2RS Inch Deep Groove Ball Bearings 1/2"x1-1/8"x5/16" (12.7x28.575x7.938mm) – Miniature Sealed Bearings for Motors, Power Tools, Fans, Pumps & Light Industrial Equipment

The R8 series inch miniature deep groove ball bearings feature standard dimensions of 1/2" ID × 1-1/8" OD × 5/16" W (12.7 × 28.575 × 7.938 mm), offering a robust balance of load capacity and compact design—ideal for small to medium electric motors, power tools, exhaust fans, water pumps, kitchen appliances, and light-duty industrial machinery.

Available in multiple sealing options to suit your operating environment:

R8: Open type – minimal friction, best for clean or oil-lubricated systems
R8Z / R8ZZ: Single or double metal shields – reduce dust ingress while retaining factory grease
R8RS / R8-2RS: Single or double rubber seals – provide excellent protection against moisture, dust, and fine contaminants

Manufactured from high-quality chrome steel (SAE 52100) with precision grinding for smooth, quiet rotation and extended service life. Stainless steel (440C) versions are available upon request for corrosive or washdown applications.

These bearings support both radial and moderate axial loads, making them suitable for medium-speed applications where reliability and durability are essential.

🔧 Key Specifications:

Models: R8, R8Z, R8ZZ, R8RS, R8-2RS
Dimensions: 1/2" × 1-1/8" × 5/16" (12.7 × 28.575 × 7.938 mm)
Material: Chrome Steel (standard); Stainless Steel optional
Type: Inch series miniature deep groove ball bearing
Ideal for: Electric motors, power tools, HVAC fans, pumps, home appliances

⚠️ Tip: Use R8-2RS in wet or dusty conditions; R8ZZ for dry indoor environments; open R8 for high-speed or custom-lubricated setups.

Each bearing undergoes strict quality inspection and is packed in anti-rust packaging. Available in single units or bulk—contact us for OEM or wholesale orders!

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