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60 Series
Home Deep Groove Ball Bearings 60 Series

6018-ZZ Double Shielded Deep Groove Ball Bearing | Space-Optimized Light Series | 90×140×24 mm

6018-ZZ Double Shielded Deep Groove Ball Bearing | Space-Optimized Light Series | 90×140×24 mm

The 6018-ZZ is a precision-engineered, light-series ball bearing designed specifically for applications requiring a large shaft diameter within restricted radial spaces. Equipped with twin pressed-steel shields (ZZ), this bearing creates a non-contact barrier that safeguards the internal rolling elements from industrial particulates while permanently retaining the factory-filled lubricant. With a 90mm bore, a 140mm outer diameter, and a slim 24mm profile, the 6018-ZZ delivers reliable rotational efficiency for heavy-duty electric motors, industrial blowers, and precision gear units where housing dimensions are tightly constrained.

6018-ZZ Deep Groove Ball Bearing 90x140x24 mm | Standard 60 Series | Frictionless Steel Shields

Constructed from high-purity GCr15 chrome steel, the 6018-ZZ is optimized to handle substantial radial loads alongside moderate axial forces. Because it belongs to the 60 dimension series, it features a thinner cross-section compared to the medium 62 series, offering engineers a critical weight-saving advantage without compromising structural rigidity. The non-contact shielding mechanism ensures that the bearing operates with minimal friction torque, preventing unnecessary heat accumulation and permitting sustained high-speed rotation with zero required maintenance.

6018-ZZ Double Shielded Deep Groove Ball Bearing | Space-Optimized Light Series | 90×140×24 mm

Comprehensive Applications

The 6018-ZZ provides exceptional shaft support and minimizes energy loss across various demanding sectors:

Large-Scale Motor & Drive Systems
  • High-efficiency AC/DC industrial motors
  • Elevator traction machines and hoist drives
  • Compact power transmission gearboxes
Industrial Fluid & Air Management
  • Heavy-duty centrifugal pump shafts
  • Large commercial HVAC blowers and fans
  • Rotary and screw compressor systems
Precision Machinery & Manufacturing
  • Paper mill processing rollers
  • Textile machinery spindles
  • Automated material handling conveyors

Key Performance Features

01. Space and Weight Efficiency

As a light-duty 60 series bearing, it accommodates a large 90mm shaft while maintaining a highly compact 140mm outer diameter. This thin-section architecture allows equipment designers to downsize housings and reduce overall machinery weight while maintaining robust load-carrying capabilities.

02. Zero-Friction Particulate Shielding

The dual metallic shields (ZZ) are tightly fitted to the outer ring with a precise labyrinth clearance over the inner ring. This prevents the ingress of dry dust and metallic shavings while eliminating the physical drag associated with rubber contact seals, making it highly suited for continuous, high-RPM environments.

03. Acoustic and Rotational Stability

Manufactured to strict P0 (standard) tolerances with the option for P6 precision, the super-finished raceways guarantee smooth ball tracking. This meticulous internal geometry severely dampens operational vibration, a critical requirement for extending the lifespan of sensitive motor windings and neighboring drivetrain components.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 60 Series (Light Duty)
Basic Designation 6018
Suffix ZZ (Double Non-Contact Metal Shields)
Bore Diameter (d) 90 mm
Outer Diameter (D) 140 mm
Width (B) 24 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard (P0) / P6 Available
Cage Material Pressed Steel
Dynamic Load Rating (Cʳ) 58.5 kN
Static Load Rating (C₀ʳ) 43.0 kN
Limiting Speed (Grease) 4,300 r/min
Limiting Speed (Oil) --
Weight (approx.) 1.16 kg

Interchange Part Numbers

Cross-reference compatibility for standard 90mm bore shielded light-series bearings:

  • SKF: 6018-2Z
  • NSK: 6018ZZ
  • FAG: 6018-2Z
  • KOYO: 6018ZZ
  • NTN: 6018ZZ
  • TIMKEN: 6018ZZ

Design & Configuration

The 6018-ZZ arrives pre-packed with premium synthetic industrial grease. When specifying this bearing for large electric motors operating under high thermal stress, a C3 internal radial clearance is highly recommended to compensate for shaft expansion. For equipment operating in highly contaminated, wet, or muddy environments, engineers should specify the 6018-2RS variant featuring physical contact seals.

"Combining a space-saving profile with rigorous contaminant protection, the 6018-ZZ is engineered to keep large-scale industrial machinery running efficiently."

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