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63 Series
Home Deep Groove Ball Bearings 63 Series

6301-ZZ Metric Shielded Ball Bearing | Enhanced Rotational Agility Metal Shield Performance | 12×37×12 mm

6301-ZZ Metric Shielded Ball Bearing | Enhanced Rotational Agility Metal Shield Performance | 12×37×12 mm

The 6301-ZZ stands out as a highly reliable, dual-metal-shielded single-row radial ball bearing engineered to deliver smooth rotational agility under high-frequency conditions and steady radial forces. To minimize power loss, this model incorporates twin non-contact pressed steel shields (ZZ) that form a precise gap over the internal elements, successfully locking in factory-applied grease and deflecting micro-particulates without introducing frictional resistance. Featuring standard metric dimensions—a 12 mm bore, 37 mm outer diameter, and 12 mm width—the 6301-ZZ provides a perfect mechanical solution for compact power tools, small electric motors, and modern appliance hardware.

6301-ZZ Deep Groove Ball Bearing 12x37x12 mm | Double Metal Shield Protection | Accelerated Speed Precision Configuration

Engineered to sustain continuous high speeds and clean operation, the ZZ configuration relies on precisely stamped steel closures fixed securely to the outer ring. This architecture shields the super-finished raceways and high-grade rolling elements from abrasive airborne dust while allowing the component to spin freely up to its maximum rated velocity. It is the preferred choice for consumer electronics, small drive systems, and light industrial machinery where cutting down mechanical drag is vital to boosting system lifespan.

6301-ZZ Metric Shielded Ball Bearing | Enhanced Rotational Agility Metal Shield Performance | 12×37×12 mm

Comprehensive Applications

Optimized for low thermal generation and small-to-medium metric footprints, the 6301-ZZ is widely deployed across modern commercial and manufacturing setups:

Electric Motors & Household Devices
  • High-Efficiency Vacuum Cleaner Motors
  • Kitchen Food Processors and Blender Drives
  • Residential Ventilation and Ceiling Fans
Small Mobility & Vehicle Elements
  • Electric Bike Hub Motors and Transmissions
  • Electric Scooter Wheel Bearings
  • Motorcycle Engine Auxiliary Shafts
Power Tools & Maintenance Equipment
  • Handheld Electric Drills and Impact Drivers
  • Compact Orbital Sanders and Polishers
  • Portable Woodworking Routers and Trimmers
Light Industrial & Printing Automation
  • Textile Spinning Machinery Rollers
  • Paper Handling and Commercial Printing Drives
  • Labeling and Light-Duty Conveyor Pulley Lines

Key Performance Features

01. Premium GCr15 Chrome Steel Construction

Forged from ultra-pure GCr15 Chrome Steel (AISI 52100), the deep-groove channels are micro-polished to eliminate surface imperfections. This structural density limits operational heat buildup and dampens harmonic vibrations under load.

02. Friction-Free Non-Contact Metallic Protection

The dual pressed-steel shields (ZZ) establish a microscopic, non-contact gap over the inner ring landing. This blocks larger dust particles from entering the rolling pathways while introducing zero extra torque, maximizing motor energy efficiency.

03. Long-Life Thermal Greasing Profile

Every unit comes factory-calibrated and pre-packed with a high-shear lithium grease formulation. The non-contact metal shielding allows the bearing to work efficiently under standard grease parameters or adapt seamlessly to external oil mist networks when specialized velocity limits are targeted.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 63 Series (Medium Metric Series)
Basic Designation 6301
Suffix ZZ / 2Z / ZR / 2ZR (Two Metal Shields)
Bore Diameter (d) 12 mm
Outer Diameter (D) 37 mm
Width (B) 12 mm
Material (Races & Balls) High-Carbon Chrome Steel (GCr15 / AISI 52100)
Precision Class ABEC-1 (ABEC-3 / ABEC-5 Upgrades Available)
Cage Material Standard Pressed Steel Cage
Dynamic Load Rating (Cʳ) 9.70 kN
Static Load Rating (C₀ʳ) 4.20 kN
Limiting Speed (Grease) 22,000 r/min
Limiting Speed (Oil) 26,000 r/min
Weight (approx.) 0.060 kg

Interchange Part Numbers

The 6301-ZZ is fully standardized globally and can replace or substitute the following industry designations:

  • NSK: 6301ZZ / 6301 ZZ
  • SKF: 6301-2Z / 6301ZZ
  • KOYO: 6301ZZ
  • NTN: 6301ZZ
  • EZO: 6301ZZ
  • FAG: 6301-2Z
  • Timken: 6301ZZ

Design & Configuration

The internal architecture of the 6301-ZZ focuses on mitigating rolling resistance while supporting balanced radial forces. Unlike contact rubber alternatives that generate friction by pressing against the rotating inner ring, these metal shields sit in a specialized recess with an engineered gap. This setup locks the internal high-speed grease matrix tightly inside the rolling channel without sacrificing rotational momentum.

It serves as an excellent replacement choice for machinery running in clean or enclosed environments that demand cool operation, such as high-output electric motors, woodworking power tools, and high-velocity fan systems.

"A high-velocity, metal-shielded metric mechanical core designed to support stable radial loads while delivering drag-free, energy-efficient performance for commercial machinery."

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The 6301-ZZ stands out as a highly reliable, dual-metal-shielded single-row radial ball bearing engineered to deliver smooth rotational agility under high-frequency conditions and steady radial forces. To minimize power loss, this model incorporates twin non-contact pressed steel shields (ZZ) that form a precise gap over the internal elements, successfully locking in factory-applied grease and deflecting micro-particulates without introducing frictional resistance. Featuring standard metric dimensions—a 12 mm bore, 37 mm outer diameter, and 12 mm width—the 6301-ZZ provides a perfect mechanical solution for compact power tools, small electric motors, and modern appliance hardware.

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