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When a worn or noisy bearing starts slowing down your equipment — whether it's a motor shaft, conveyor roller, or power tool spindle — finding the right replacement fast matters. These 6000–6008 series deep groove ball bearings are stocked in both rubber-sealed (2RS) and metal-shielded (ZZ) configurations, giving engineers, maintenance technicians, and DIY builders a direct drop-in solution without guesswork.
Each bearing features a chrome steel (GCr15) inner and outer ring with precision-ground raceways and a full complement of steel balls. The rubber cap (2RS) variant uses contact lip seals on both sides to block dust, moisture, and light lubricant contamination, while the iron cap (ZZ) variant uses non-contact metal shields for lower drag at higher rotational speeds. Bore diameters span 10 mm (0.394 in) to 40 mm (1.575 in), with outer diameters from 26 mm (1.024 in) to 68 mm (2.677 in) and widths from 8 mm (0.315 in) to 15 mm (0.591 in).
Typical use cases include electric motor front and rear shaft support, skateboard and inline skate wheel axles, small agricultural equipment gearboxes, 3D printer carriage and extruder assemblies, and light industrial conveyor idler rollers — anywhere a compact, pre-lubricated, sealed radial bearing is needed to handle moderate radial loads at rotational speeds typically ranging from 8,000 to 18,000 RPM depending on size and seal type.
| Bearing Series | 6000, 6001, 6002, 6003, 6004, 6005, 6006, 6007, 6008 |
|---|---|
| Seal Type | Rubber Cap (2RS) / Iron Cap (ZZ) — see variant options |
| Bore Diameter (ID) | 10 mm / 12 mm / 15 mm / 17 mm / 20 mm / 25 mm / 30 mm / 35 mm / 40 mm |
| Outer Diameter (OD) | 26 mm / 28 mm / 32 mm / 35 mm / 42 mm / 47 mm / 55 mm / 62 mm / 68 mm |
| Width (Thickness) | 8 mm / 8 mm / 9 mm / 10 mm / 12 mm / 12 mm / 13 mm / 14 mm / 15 mm |
| Material | Chrome steel (GCr15) rings and balls |
| Tolerance Class | ABEC-3 / P6 (typical) |
| Lubrication | Grease-filled (2RS) / Light oil film (ZZ) |
| Operating Temperature | Typically −20°C to +120°C (−4°F to +248°F) for 2RS; up to +150°C (302°F) for ZZ |
| Pack Quantity | See variant options (1 / 3 / 5 / 10 Pcs) |
| Dimensional Standard | ISO 15 |
The 2RS (Rubber Cap) uses contact lip seals on both sides of the bearing. These seals physically touch the inner ring, creating a tighter barrier against dust, water splash, and grease loss — making them the better choice for dirty or wet environments. The ZZ (Iron Cap) uses non-contact metal shields that sit close to but do not touch the inner ring. This reduces friction and drag, allowing slightly higher maximum speeds and lower running temperatures, but provides less protection against fine particle ingress. Choose 2RS for contaminated environments; choose ZZ for cleaner, higher-speed applications.
Measure three dimensions on your existing bearing or housing: bore diameter (ID — the hole that fits the shaft), outer diameter (OD — the dimension that fits the housing bore), and width (thickness). Match these to the variant options listed above. For example, a 6004 bearing has a 20 mm ID, 42 mm OD, and 12 mm width. If you only have the bearing number stamped on the old part, use that number directly to select the matching variant.
Yes. All sizes in this listing conform to ISO 15 dimensional standards, which define the bore, OD, and width tolerances for the 6000 series. This means they are dimensionally interchangeable with bearings from other manufacturers that carry the same ISO designation (e.g., 6004-2RS from any ISO-compliant source). Always verify the three key dimensions before installation.
Dynamic radial load capacity varies by size. As a conservative reference range: the 6000 (smallest) typically handles around 4.5–5 kN dynamic radial load, while the 6008 (largest in this listing) handles approximately 16–19 kN. Exact rated values depend on the specific manufacturer's production batch. For safety-critical or high-load applications, contact us to confirm rated capacity before ordering.
No additional lubrication is required before installation in most standard applications. The 2RS rubber-sealed variants are factory-packed with grease that is retained by the contact seals for the bearing's service life under normal operating conditions. The ZZ metal-shielded variants carry a light oil film; in high-load or high-temperature applications, you may wish to add a small amount of compatible grease to the housing before fitting. Do not over-grease, as excess lubricant generates heat and can reduce bearing life.
Deep groove ball bearings can accommodate moderate axial loads in addition to their primary radial load capacity — typically up to about 50% of the dynamic radial load rating as a conservative guideline. They are not designed for predominantly axial applications; for those, angular contact or thrust bearings are more appropriate. If your application involves significant combined radial and axial loading, contact us to confirm suitability.
Maximum speed depends on bearing size and seal type. As a general reference, smaller sizes (6000–6002) with ZZ shields can typically operate up to 18,000–22,000 RPM, while the same sizes with 2RS rubber seals are rated somewhat lower (typically 14,000–18,000 RPM) due to seal contact friction. Larger sizes (6006–6008) have lower speed limits — typically 8,000–12,000 RPM for ZZ and 6,000–9,000 RPM for 2RS. These are indicative ranges; confirm with your application's specific load and lubrication conditions.
