Overview
The SKF 6203-J is a cylindrical bore deep groove ball bearing from SKF’s trusted 6200 series. Engineered for industrial automation, mechanical drive systems, and power transmission applications, the 6203-J delivers reliable radial and axial load carrying capacity with minimal friction and vibration. This New in Box unit is ready for immediate installation in electric motors, pumps, gearboxes, and spindle assemblies.
Key Features
- Low-friction design — Enables high rotational speeds up to 24,000 RPM (limiting speed) with minimal heat generation
- Dual-direction load capacity — Accommodates both radial and axial loads in both directions
- 6200 series standard dimensions — 17mm bore × 40mm OD × 12mm width fits most OEM motor frames and gearbox housings
- Open seal design — Suitable for general industrial use; compatible with standard lubrication schedules
- Premium SKF quality — Chrome steel construction (52100) with stamped steel cage for durability and long service life
Technical Specifications
- Bore diameter (d): 17 mm
- Outer diameter (D): 40 mm
- Width (B): 12 mm
- Dynamic load rating (C): 9.95 kN (approximately 2,236 lbf)
- Static load rating (Câ‚€): 4.75 kN (approximately 1,068 lbf)
- Limiting speed: 24,000 RPM
- Reference speed: 38,000 RPM
- Bearing material: Chrome steel (52100)
- Cage material: Stamped steel
- Seal type: Open (unsealed)
- Weight: 0.0646 kg (0.142 lbs)
- Closure type: Open
Typical Applications
The SKF 6203-J is widely deployed in:
- AC and DC electric motor bearings
- Pump and compressor assemblies
- Gearbox shafts and spindles
- Machine tool spindle bearings
- Conveyor and material handling systems
- Industrial fan and blower bearings
- High-speed rotating equipment requiring precise radial/axial load support
Compatibility & Replacements
Compatible With
- Standard 17mm bore motor frames (NEMA, IEC, foot-mounted, flange-mounted)
- OEM gearbox housings with 17mm shaft bores
- Spindle assemblies and precision machine tool drives
- Pump and compressor shafts with 17mm bore requirements
- Industrial conveyor and transmission systems
Replaces / Drop-In Replacement For
- 6203 (open seal variant)
- 6203-2RS (sealed variant) — verify seal orientation before installation
- MRC 203 bearing (with tolerance verification)
- NSK 6203 bearing
- NTN 6203 bearing
Works With
- Standard ISO/SKF lubrication specifications (mineral and synthetic greases)
- OEM motor and gearbox assembly procedures
- ISO 286 cylindrical bore tolerances
- High-speed rotating applications up to 24,000 RPM (limiting)
