R155,R155Z, R155ZZ,R155RS, R155-2RS Inch Deep Groove Ball Bearings 1-1/4"x2-1/2"x1" (31.75x63.5x25.4mm) – Heavy-Duty Sealed Bearings for Large Motors, Pumps, Industrial Fans, Gearboxes & Machinery

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R155,R155Z, R155ZZ,R155RS, R155-2RS Inch Deep Groove Ball Bearings 1-1/4"x2-1/2"x1" (31.75x63.5x25.4mm) – Heavy-Duty Sealed Bearings for Large Motors, Pumps, Industrial Fans, Gearboxes & Machinery

The R155 series inch deep groove ball bearings feature standard dimensions of 5/32"x5/16"x1/8" (3.968x7.938x3.175mm), offering high radial and moderate axial load capacity—ideal for heavy-duty industrial applications such as large electric motors, water/oil pumps, industrial blowers, gear reducers, agricultural equipment, and conveyor systems.

Available in multiple sealing configurations to suit your operating environment:

R155: Open type – minimal friction, ideal for clean or oil-lubricated systems
R155Z / R155ZZ: Single or double metal shields – reduce dust ingress while retaining factory grease
R155RS / R155-2RS: 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 operation and extended service life. Stainless steel (440C) versions are available upon request for corrosive or washdown environments.

These bearings are engineered for reliability in medium to high-speed operations where durability, load capacity, and consistent performance are critical.

🔧 Key Specifications:

Models: R155,R155Z, R155ZZ,R155RS, R155-2RS
Dimensions: 5/32"x5/16"x1/8" (3.968x7.938x3.175mm)
Material: Chrome Steel (standard); Stainless Steel optional
Type: Inch series deep groove ball bearing
Ideal for: Large industrial motors, pump shafts, HVAC fans, gear drives, farm & construction machinery

⚠️ Tip: Use R20-2RS in wet/dusty conditions; R20ZZ for dry indoor use; open R20 for high-speed or custom-lubricated setups.

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