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R156, R156Z, R156ZZ, R156RS, R156-2RS Inch Miniature Deep Groove Ball Bearings 3/16"​x5/16"​x1/8" (4.762x7.938x3.175mm) – Sealed Bearings for Small Motors, Power Tools, Printers, RC Models & Precision
Needle Bearing for Printing Machines
R156, R156Z, R156ZZ, R156RS, R156-2RS Inch Miniature Deep Groove Ball Bearings 3/16"​x5/16"​x1/8" (4.762x7.938x3.175mm) – Sealed Bearings for Small Motors, Power Tools, Printers, RC Models & Precision

R156, R156Z, R156ZZ, R156RS, R156-2RS Inch Miniature Deep Groove Ball Bearings 3/16"​x5/16"​x1/8" (4.762x7.938x3.175mm) – Sealed Bearings for Small Motors, Power Tools, Printers, RC Models & Precision

R156, R156Z, R156ZZ, R156RS, R156-2RS Inch Miniature Deep Groove Ball Bearings 3/16"​x5/16"​x1/8" (4.762x7.938x3.175mm) – Sealed Bearings for Small Motors, Power Tools, Printers, RC Models & Precision Equipment
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R156, R156Z, R156ZZ, R156RS, R156-2RS Inch Miniature Deep Groove Ball Bearings 3/16"x5/16"x1/8" (4.762x7.938x3.175mm) – Sealed Bearings for Small Motors, Power Tools, Printers, RC Models & Precision Equipment


The R156 series inch miniature deep groove ball bearings feature standard dimensions of 3/16"x5/16"x1/8" (4.762x7.938x3.175mm) , offering higher load capacity than smaller 155-series bearings—ideal for small electric motors, power tools, printers, scanners, RC vehicles, drones, and precision mechanical devices.
Available in multiple sealing options to match your operating environment:
  • R156: Open type – minimal friction, ideal for clean or oil-lubricated systems
  • R156Z /R 156ZZ: Single or double metal shields – reduce dust ingress while retaining factory grease
  • R156RS / R156-2RS: 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 applications.
These bearings support both radial and moderate axial loads, making them suitable for low-to-medium speed applications where reliability and compact design are essential.
🔧 Key Specifications:
  • Models: R156, R156Z, R156ZZ, R156RS, R156-2RS
  • Dimensions: 3/16"x5/16"x1/8" (4.762x7.938x3.175mm) 
  • Material: Chrome Steel (standard); Stainless Steel optional
  • Type: Inch miniature deep groove ball bearing
  • Ideal for: Electric screwdrivers, model engines, office automation, hobby gearboxes
⚠️ Note: This is the 156 series (not R156). Always verify shaft and housing dimensions before installation.

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