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When a motor starts running rough, a conveyor develops an unexpected wobble, or a DIY build demands a reliable rotating element, the root cause is often a worn or incorrectly specified bearing. Engineers, maintenance technicians, and hands-on builders who need a drop-in replacement or a first-fit solution for light-to-medium radial load applications will find the 6200–6210 series to be the industry-standard answer.
This listing covers the full 6200 through 6210 deep groove ball bearing range in two sealed configurations: ZZ (double-shielded steel plate, grease-retained, low drag) and RZ (single-side rubber-contact seal, enhanced dust exclusion on the open side). Inner diameters span 10 mm to 50 mm (approx. 0.39″–1.97″); outer diameters run 30 mm to 90 mm (approx. 1.18″–3.54″). Rings and balls are manufactured from through-hardened bearing steel with a raceway ground finish, pre-packed with lithium-based grease suitable for continuous operation across a typical temperature range of −20 °C to +120 °C (−4 °F to +248 °F).
Typical use cases include electric motor shaft support (6203-ZZ and 6204-ZZ are the most common motor-end sizes), conveyor roller and idler assemblies where the ZZ shield keeps grease in under vibration, and DIY CNC, 3D printer, and workshop equipment builds where the compact 6200 and 6201 sizes fit standard pillow-block housings. The RZ variants suit environments with moderate particulate exposure — woodworking dust, light swarf — where a contact seal on one face meaningfully extends service life.
Select from 22 size/seal combinations — 6200 through 6210 in both ZZ and RZ configurations — covering bore sizes 10 mm to 50 mm without switching suppliers.
ZZ shields retain grease and exclude coarse debris with minimal friction penalty. RZ rubber-contact seals add a wiping action on one face, reducing fine-particle ingress in dusty or lightly contaminated environments.
Rings and rolling elements are produced from through-hardened bearing steel, ground to raceway tolerances consistent with ABEC-3 / P6 class, delivering consistent radial play and predictable fatigue life under rated loads.
Factory-filled with lithium-soap grease rated for continuous operation from −20 °C to +120 °C (−4 °F to +248 °F), eliminating the need for re-lubrication in most standard-duty applications.
Order a single bearing for a one-off repair or a 10-pack for production runs and maintenance stock — pricing scales with quantity so you only pay for what you need.
Dimensions conform to ISO 15 standards, making these bearings direct drop-in replacements for SKF, NSK, FAG, NTN, and Timken equivalents of the same designation with no housing modification required.
| Bearing Series | 6200, 6201, 6202, 6203, 6204, 6205, 6206, 6207, 6208, 6209, 6210 |
|---|---|
| Seal / Shield Types | ZZ (double steel shield), RZ (single rubber-contact seal) |
| Bore Diameter (d) | 10 mm – 50 mm (approx. 0.39″ – 1.97″) — see variant options |
| Outer Diameter (D) | 30 mm – 90 mm (approx. 1.18″ – 3.54″) — see variant options |
| Width (B) | 9 mm – 20 mm — see variant options |
| Ring & Ball Material | Through-hardened bearing steel (GCr15 equivalent) |
| Cage Material | Steel (stamped) |
| Grease Type | Lithium-soap grease |
| Operating Temperature | −20 °C to +120 °C (−4 °F to +248 °F) |
| Dimensional Standard | ISO 15 |
| Tolerance Class | ABEC-3 / P6 (typical) |
| Pack Quantity Options | 1, 2, 3, 4, 5, or 10 pieces (size-dependent) |
Choose ZZ (double steel shield) when your priority is low friction and grease retention in a relatively clean environment — electric motors, fans, and lightly loaded spindles are typical fits. Choose RZ (single rubber-contact seal) when one side of the bearing faces moderate dust or fine particulate — woodworking equipment, light agricultural machinery, or workshop tools — because the contact lip actively wipes the shaft and reduces ingress. Note that RZ adds a small amount of drag torque compared to ZZ.
Standard ISO 15 dimensions for the most common sizes: 6200 (d=10, D=30, B=9 mm) · 6201 (d=12, D=32, B=10 mm) · 6202 (d=15, D=35, B=11 mm) · 6203 (d=17, D=40, B=12 mm) · 6204 (d=20, D=47, B=14 mm) · 6205 (d=25, D=52, B=15 mm) · 6206 (d=30, D=62, B=16 mm) · 6207 (d=35, D=72, B=17 mm) · 6208 (d=40, D=80, B=18 mm) · 6209 (d=45, D=85, B=19 mm) · 6210 (d=50, D=90, B=20 mm). Always verify against your housing drawing before ordering.
Yes. The 6200–6210 series follows ISO 15 dimensional standards, which are adopted by all major bearing manufacturers. A 6203-ZZ from this listing will have the same bore, outer diameter, and width as an SKF 6203-2Z, NSK 6203ZZ, FAG 6203-2Z, or NTN 6203ZZ. The internal geometry (ball count, radial play) may vary slightly between manufacturers but remains within the same tolerance class for standard-duty applications.
Rated speeds and load capacities vary by size. As a general reference for the sealed variants: the 6203-ZZ carries a dynamic load rating (C) of approximately 7.8 kN and a static rating (C₀) of approximately 3.75 kN, with a limiting speed of around 18,000 rpm (grease). Larger sizes (6208–6210) have higher load ratings but lower limiting speeds. Contact us to confirm rated values for your specific size if your application is load-critical.
Standard bearing steel is not corrosion-resistant. For occasional moisture exposure, the ZZ shield provides a degree of protection by retaining grease and slowing water ingress. For continuous wet, washdown, or mildly corrosive environments, consider stainless-steel variants (not included in this listing) or apply a compatible corrosion-inhibiting grease after removing the shield. Contact us if you need guidance on stainless or ceramic alternatives.
Common indicators of bearing wear include: audible roughness or grinding noise during rotation, increased vibration or heat at the bearing location, visible pitting or discoloration on the shield, and measurable radial play beyond the original specification. For sealed bearings, re-lubrication is not practical — replacement is the correct action once wear is detected. Keeping a small stock of the sizes used in your equipment minimises downtime.
For a single repair, the 1-piece option minimises cost. For equipment with multiple bearing points of the same size — such as a conveyor with several idler rollers — the 5- or 10-piece pack reduces per-unit cost and ensures you have spares on hand. If you run a workshop or service multiple machines, ordering a 10-pack of your two or three most-used sizes (commonly 6203 and 6204) is a practical approach to reducing emergency procurement delays.
