6203-ZZ Deep Groove Ball Bearing For Electric Motors and Industrial Machinery | 17×40×12 mm
The 6203-ZZ is a Double-Shielded Deep Groove Ball Bearing engineered for reliable performance in electric motors and general industrial applications. Featuring the standardized deep groove raceway geometry, this bearing efficiently accommodates moderate radial loads and bidirectional axial loads in space-constrained assemblies. With a 17 mm bore, 40 mm outer diameter, and 12 mm width, it offers a balanced cross-section suitable for various mechanical housings. Equipped with double metal shields (ZZ) for effective contamination resistance while maintaining low friction operation, it is an ideal choice for applications requiring extended service life with minimal maintenance intervention .
6203-ZZ Deep Groove Ball Bearing 17x40x12 mm | Standard 6200-Series | Double Metal Shields (ZZ)
A widely specified bearing variant featuring the optimized deep groove raceway design. Engineered for dependable and quiet operation at speeds up to 18,000 r/min (Grease) . The 6203-ZZ delivers substantial load capacity within a compact envelope, making it a preferred component for electric motors, pumps, automotive systems, and light industrial machinery where comprehensive protection against contaminants is required .

Ideal for industrial equipment and rotating assemblies:
The 6203-ZZ incorporates precision-engineered raceway curvatures that maximize ball contact area for enhanced radial load distribution. Manufactured from high-quality chrome steel (SAE 52100), it delivers consistent mechanical performance and extended fatigue life under continuous operating conditions.
Features dual Z-type metal shields on both sides, providing effective protection against dust, dirt, and larger particles while retaining the initial grease lubrication . This non-contact shielding configuration minimizes frictional resistance, allowing for high-speed operation in environments where re-lubrication is not intended or practical .
Produced to ISO dimensional tolerances with carefully controlled raceway surface finish . The precision-ground balls and optimized internal clearance ensure reduced frictional torque, minimal vibration characteristics, and quiet operational performance, contributing to reliable long-term service life in continuous-duty applications .
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 62 Series – Light Duty Series |
| Basic Designation | 6203 |
| Suffix | Double Metal Shield (ZZ) |
| Bore Diameter (d) | 17 mm |
| Outer Diameter (D) | 40 mm |
| Width (B) | 12 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | Standard ABEC-1 (P0) / ABEC-3 (P6) Available |
| Cage Material | Pressed Steel (Standard) |
| Dynamic Load Rating (Cʳ) | 9.55 – 10.6 kN |
| Static Load Rating (C₀ʳ) | 4.6 – 4.8 kN |
| Limiting Speed (Grease) | 17,000 – 18,000 r/min |
| Limiting Speed (Oil) | 21,000 – 22,000 r/min |
| Weight (approx.) | 66 g |
Direct replacement for:
The 6203-ZZ is supplied as a pre-lubricated, double-shielded unit ready for immediate installation . The low-friction metal shields provide excellent protection in clean to moderately contaminated environments while maintaining high-speed capability. For applications requiring contact seals for wet or heavily contaminated conditions, rubber-sealed variants (2RS) are also available. If you require specific internal clearances (C3 for high-speed applications) , alternative lubricants, or custom packaging configurations, please consult our technical sales team for availability.
"For electric motors, pumps, and general industrial machinery requiring comprehensive protection with minimal maintenance, the 6203-ZZ delivers reliable performance with its double-shielded configuration. Its standardized dimensions and balanced load capacity make it a versatile, cost-effective solution for a wide range of applications."
The 6230 M is a heavy-duty, single-row deep groove ball bearing engineered for the most demanding industrial applications requiring high load capacity and reliable performance under continuous operation. Featuring a machined one-piece brass cage (M suffix) , this bearing offers superior strength, optimal ball guidance, and low friction, making it ideal for large electric motors, pumps, and heavy machinery where durability and high-speed stability are critical. Its open design allows for flexible lubrication strategies to suit specific operating conditions.
Details
The 628-2RS is a compact, single-row deep groove ball bearing engineered for space-constrained applications requiring reliable performance under light to moderate loads. Featuring dual RS-type rubber seals, this bearing provides effective protection against dust, moisture, and other contaminants while retaining lubrication for extended service life. With an 8 mm bore and 8 mm width, it is the preferred choice for small electric motors, power tools, and automation equipment where sealing and low friction are critical.
Details
The 6201-Z is a versatile, single-row deep groove ball bearing engineered for light industrial and automotive applications requiring dependable performance under moderate loads. Featuring a single Z-type metal shield on one side, this bearing provides effective protection against dust and solid contaminants while maintaining low frictional torque and allowing for relubrication if needed. With a 12 mm bore and 10 mm width, it is the preferred choice for small electric motors, pumps, and automotive auxiliary systems where durability and contamination resistance are critical for extended service life.
Details
The 6202-Z is a versatile, single-row deep groove ball bearing engineered for light industrial and automotive applications requiring dependable performance under moderate loads. Featuring a single Z-type metal shield on one side, this bearing provides effective protection against dust and solid contaminants while maintaining low frictional torque and allowing for relubrication if needed. With a 15 mm bore and 11 mm width, it is the preferred choice for small electric motors, pumps, and automotive auxiliary systems where durability and contamination resistance are critical for extended service life.
Details
The 6202-ZZ is a Versatile Double-Shielded Deep Groove Ball Bearing engineered for high-performance in a wide array of industrial and light machinery applications. Utilizing the industry-standard deep groove raceway design, this bearing efficiently manages substantial radial loads as well as light axial loads in both directions. With a 15 mm bore, 35 mm outer diameter, and an 11 mm width, it offers a balanced profile suitable for compact assemblies. Fitted with double metal shields (ZZ) to prevent contamination ingress, it is an ideal choice for electric motors, pumps, and general equipment requiring durable and low-maintenance operation.
Details
The 6203-Z is a Single-Shielded Deep Groove Ball Bearing designed for reliable performance in light industrial equipment and drive systems. Featuring the standard deep groove raceway geometry, this bearing effectively accommodates moderate radial forces and light axial loads in both directions. With a 17 mm bore, 40 mm outer diameter, and 12 mm width, it provides a robust cross-section suitable for compact machinery housings. Equipped with a single metal shield (Z) on one side for contamination resistance while maintaining accessibility for re-lubrication, it is an excellent choice for applications requiring balanced protection and maintenance flexibility .
Details
The 6203-ZZ is a Double-Shielded Deep Groove Ball Bearing engineered for reliable performance in electric motors and general industrial applications. Featuring the standardized deep groove raceway geometry, this bearing efficiently accommodates moderate radial loads and bidirectional axial loads in space-constrained assemblies. With a 17 mm bore, 40 mm outer diameter, and 12 mm width, it offers a balanced cross-section suitable for various mechanical housings. Equipped with double metal shields (ZZ) for effective contamination resistance while maintaining low friction operation, it is an ideal choice for applications requiring extended service life with minimal maintenance intervention .
Details
The 6204-Z is a Single-Shielded Deep Groove Ball Bearing engineered for dependable performance in pumps, gearboxes, and light industrial machinery. Featuring the standardized deep groove raceway geometry, this bearing effectively accommodates moderate radial loads and bidirectional axial loads in space-constrained assemblies. With a 20 mm bore, 47 mm outer diameter, and 14 mm width, it offers a robust cross-section suitable for various mechanical housings . Equipped with a single metal shield (Z) on one side for contamination resistance while maintaining accessibility for re-lubrication, it is an ideal choice for applications requiring balanced protection and maintenance flexibility.
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