Overview
The SKF 6313 ZJEM is a high-performance single row deep groove radial ball bearing engineered for durability and consistent operation across demanding industrial applications. This bearing features a single steel shield on one side, C3 internal clearance, and ABEC 1 precision rating. SKF’s Explorer series offers proven reliability for machinery requiring smooth rotational motion and long service life. The 6313 ZJEM delivers the load-carrying capacity and speed capability needed for electric motors, pumps, compressors, gearboxes, and textile machinery.
Key Features
- Single Row Deep Groove Design: Supports both radial and light axial loads with minimal friction.
- Steel Shield (Z) Enclosure: One-side shield protects against contaminants while maintaining high-speed capability.
- C3 Internal Clearance: Optimized for higher-than-normal clearance to accommodate thermal growth in electric motor applications.
- JEM Pressed Steel Cage: Quiet-running cage with rolling element centering for stable operation.
- ABEC 1 Precision Rating: Meets stringent ISO 492 standards for dimensional accuracy and noise reduction.
- Electric Motor Quality Grade: Purpose-built for industrial electric motor applications and factory-verified performance.
Technical Specifications
- Bore Diameter (d): 65 mm (2.56 in)
- Outer Diameter (D): 140 mm (5.51 in)
- Width (B): 33 mm (1.30 in)
- Series: 63 (Medium metric deep groove)
- Bearing Type: Single Row Deep Groove Ball Bearing
- Closure Type: Single Shielded (Non-Contact)
- Cage Material: Pressed Steel (JEM)
- Bearing Material: 52100 Chrome Steel
- Internal Clearance: C3 (Higher than normal)
- Precision Grade: ABEC 1
- Radial Dynamic Load Capacity: 97.5 kN (21,919 lbf)
- Radial Static Load Capacity: 60 kN (13,489 lbf)
- Maximum RPM: 5,300–6,700 rpm (speed depends on application and lubrication)
- Operating Temperature Range: −40 °C to +120 °C (−40 °F to 212 °F)
- Lubrication: EM Grease (Standard)
- Weight: 2.08 kg (4.73 lbs)
- Seal Material: Tinplate Steel Shield
- Bore Type: Cylindrical (Straight Bore)
Typical Applications
The SKF 6313 ZJEM excels in a wide range of industrial and commercial machinery:
- Electric Motors: Widely used in industrial and household motor designs.
- Pumps and Compressors: Handles continuous rotating loads in fluid handling equipment.
- Gearboxes and Transmissions: Supports intermediate and output shafts.
- Textile Machinery: Provides precision rotation for spindle and roller applications.
- HVAC Systems: Fan and blower motor support in heating and cooling equipment.
- Conveyor Systems: Reliable bearing for conveyor rollers and drive systems.
Compatibility & Replacements
Compatible With
- Industrial electric motors (AC and DC applications)
- Shaft sizes and housings designed for 65 mm bore diameter
- Standard lubrication systems using EM-grade bearing grease
- Equipment designed for C3 internal clearance specifications
- Machinery requiring ABEC 1 precision radial bearings
Replaces / Drop-In Replacement For
- SKF 6313-Z/C3 (open bearing equivalent without JEM cage)
- SKF 6313-Z/C3QE6 (alternative SKF designation)
- FAG 6313-Z-C3 (equivalent bearing)
- NTN 6313ZC3 (equivalent single row design)
- NSK 6313ZC3 (equivalent replacement)
- Koyo 6313ZC3 (comparable radial bearing)
Works With
- Standard bearing housings and pillow blocks rated for 65 mm bore
- Shaft couplings and bushings sized for 65 mm diameter
- EM (electric motor grade) greases: Shell Alvania EP 2, Mobil SHC 600, or equivalent
- Mechanical seals and splash lubrication systems
- Vibration and temperature monitoring equipment
- Motor cooling and ventilation designs operating up to 120 °C
