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63 Series
Home Deep Groove Ball Bearings 63 Series

6314 ZZ Heavy-duty Deep Groove Ball Bearing For Large Electric Motors | 70×150×35 mm

6314 ZZ Heavy-duty Deep Groove Ball Bearing For Large Electric Motors | 70×150×35 mm

The 6314 ZZ is a heavy-duty, single-row deep groove ball bearing engineered for demanding industrial applications requiring high load capacity and reliable contamination protection. Featuring dual Z-type metal shields, this bearing provides effective defense against dust and solid debris while maintaining low frictional torque. With a 70 mm bore and 35 mm width, it is the preferred choice for large electric motors, pumps, and industrial gearboxes where robust performance and extended service life are critical.

6314 ZZ Deep Groove Ball Bearing 70x150x35 mm | ISO 63 Series – Medium | Double Shielded

This precision bearing utilizes a deep groove raceway geometry, enabling stable high-speed performance up to 6,300 r/min (Grease). The 6314 ZZ is engineered to accommodate substantial radial loads as well as axial loads in both directions, making it exceptionally suited for heavy-duty applications in power generation, industrial machinery, and material handling equipment where consistent, low-friction operation is required.

6314 ZZ Heavy-duty Deep Groove Ball Bearing For Large Electric Motors | 70×150×35 mm

Comprehensive Applications

Ideal for a diverse range of heavy-duty industrial and mechanical systems:

Industrial Machinery & Drive Systems
  • Conveyor Systems and Material Handling Equipment
  • Compressors and Hydraulic Drives
  • Industrial Gearboxes and Speed Reducers
  • Large Fans, Blowers, and Ventilation Systems
Electric Motors & Power Transmission
  • Motor Repair and Rewind Applications
  • High-Speed Centrifugal Pumps
  • Large AC and DC Electric Motors
  • Industrial Generators and Alternators
Infrastructure & General Engineering
  • Agricultural and Construction Machinery
  • Oil Field and Pumping Stations 
  • HVAC Systems and Cooling Towers
  • Elevators and Hoisting Equipment
Heavy Equipment & Processing
  • Rolling Mill and Metalworking Machinery
  • Mining and Mineral Processing Equipment
  • Paper and Pulp Processing Machinery
  • Textile Manufacturing Equipment

Key Performance Features

01. Effective Contaminant Exclusion

Double Z-type non-contact steel shields provide a reliable barrier against dust, dirt, and other airborne particulates from both sides. This design helps retain lubricant integrity and significantly extends operational life in harsh environments without introducing significant rotational drag.

02. Electric Motor Quality (EMQ) Performance

Precision-manufactured components with super-finished raceways ensure consistent, quiet operation with minimal vibration. Electric Motor Quality (EMQ) standards make this bearing ideal for high-speed applications like electric motors where low noise and smooth running are critical.

03. Robust Design with High Load Capacity

Conforming to the popular 63-series medium section, the 70×150×35 mm configuration delivers a dynamic load rating of 111 - 115 kN. This robust construction ensures reliable performance in heavy-duty applications where substantial radial and axial forces are present.

 

04. High-Speed Capability

Engineered for demanding environments, the 6314 ZZ features optimized internal geometry that enables limiting speeds up to 6,300 r/min with grease lubrication, supporting stable, long-life performance in critical rotating equipment.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 63 Series – Medium
Basic Designation 6314
Suffix ZZ (Both sides with steel shields)
Bore Diameter (d) 70 mm
Outer Diameter (D) 150 mm
Width (B) 35 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class ABEC 1 / ISO P0 (Standard); ABEC 3 Available
Cage Material Pressed Steel
Dynamic Load Rating (Cʳ) 111 - 115 kN  
Static Load Rating (C₀ʳ) 68 kN
Limiting Speed (Grease) 5,300 - 6,300 r/min
Limiting Speed (Oil) 8,200 r/min 
Weight (approx.) 2.52 - 2.57 kg

Interchange Part Numbers

Direct replacement for:

  • SKF: 6314-2Z / 6314-2Z/C3 
  • NSK: 6314ZZ / 6314ZZCM
  • FAG: 6314-2Z
  • NTN: 6314ZZ
  • KOYO: 6314ZZ
  • TIMKEN: 6314-ZZ 
  • NACHI: 6314ZZ

Design & Configuration

The 6314 ZZ is furnished with double Z-type steel shields as standard, delivering enhanced internal protection in dusty or debris-prone industrial conditions. The pressed steel cage provides robust ball guidance and durability under normal operating conditions . For applications requiring a hermetic seal against moisture or finer contaminants, the double rubber-sealed variant (6314 2RS) is also available. For applications involving higher operating temperatures or shaft expansion, a C3 internal clearance variant (6314 ZZ C3) can be supplied . For electric motor applications where stray currents may be a concern, ceramic hybrid variants (3NC6314ZZ) are available with ceramic rolling elements for electrical insulation.

"The 6314 ZZ is a robust workhorse for large electric motors and industrial drives, combining high load capacity with effective contamination protection for long-term, maintenance-free operation in demanding environments."

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