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When standard carbon-steel bearings corrode, seize, or contaminate sensitive assemblies, engineers and DIY builders turn to stainless steel alternatives. These ZZ-sealed deep groove ball bearings are designed for applications where moisture, washdown, or chemical exposure would shorten the service life of conventional bearings — making them a reliable choice for food-processing equipment, marine hardware, medical devices, and outdoor power tools.
Each bearing is manufactured from stainless steel throughout — inner ring, outer ring, balls, and cage — and fitted with double-sided metal shields (ZZ) to retain grease and exclude particulate contamination. The range spans 26 size variants across multiple series (683ZZ, 626ZZ, 6303ZZ–6307ZZ, 6205ZZ–6210ZZ, 6006ZZ–6010ZZ, 6907ZZ–6911ZZ, 6808ZZ–6811ZZ), covering bore diameters from 3 mm (0.12 in) to 55 mm (2.17 in) and outer diameters from 7 mm (0.28 in) to 90 mm (3.54 in), with widths ranging from 7 mm (0.28 in) to 21 mm (0.83 in).
Typical use cases include replacing corroded bearings in marine winches and outboard motor components, supporting spindles in food-grade conveyor systems where washdown is routine, and serving as precision pivot points in laboratory instruments and medical carts where contamination control is critical. The thin-section 68xx series variants are particularly suited to space-constrained designs where a low cross-section is required.
| Bearing Type | Deep Groove Ball Bearing |
|---|---|
| Seal Type | ZZ (Double Metal Shield, Both Sides) |
| Material | Stainless Steel (rings, balls, cage) |
| Available Series | 683, 626, 6303–6307, 6205–6210, 6006–6010, 6907–6911, 6808–6811 |
| Bore Diameter (ID) | 3 mm – 55 mm (0.12 in – 2.17 in) |
| Outer Diameter (OD) | 7 mm – 90 mm (0.28 in – 3.54 in) |
| Width (T) | 7 mm – 21 mm (0.28 in – 0.83 in) |
| Lubrication | Factory-greased (grease retained by ZZ shields) |
| Load Direction | Radial (primary); Axial (moderate, both directions) |
| Dimensional Standard | ISO 15 / ABEC equivalent |
| Operating Temperature | See variant options |
| Quantity per Order | 1 pcs (per variant) |
Match the bearing bore (ID) to your shaft diameter and the outer diameter (OD) to your housing bore. Use the ID x OD x T(mm) option to confirm all three dimensions before ordering. If you are replacing an existing bearing, the size code is usually stamped on the outer ring — for example, "6205" indicates a 25 mm bore, 52 mm OD, 15 mm width.
ZZ indicates double-sided metal shields fitted on both faces of the bearing. The shields retain the factory-applied grease and prevent coarse contaminants from entering the raceway. Unlike rubber seals (2RS), ZZ shields do not contact the inner ring, resulting in slightly lower friction and higher permissible speeds, but they are less effective at excluding fine dust or liquid under pressure.
Yes. The stainless steel construction resists oxidation in humid and wet conditions where carbon-steel bearings would corrode rapidly. They are appropriate for food-processing equipment, marine hardware, and outdoor machinery. For continuous submersion or aggressive chemical exposure, verify compatibility with the specific media and consider re-greasing intervals.
Deep groove ball bearings can accommodate moderate axial loads in both directions in addition to their primary radial load capacity. They are not designed for predominantly axial applications — for those, angular contact or thrust bearings are more appropriate. For combined radial and moderate axial loads (such as in electric motors or fans), these bearings perform well within their rated capacity.
No. These bearings are factory-greased and sealed with ZZ shields, so they are ready to install without additional lubrication. Avoid removing the shields or washing out the factory grease. If the bearing will operate at elevated temperatures or in a demanding duty cycle, consult the grease specification for your operating conditions and re-grease through a fitting if your housing design allows it.
These designations refer to different dimensional series with varying relationships between bore diameter and outer diameter. The 68xx series (thin section) has the smallest OD relative to bore — ideal for space-constrained designs. The 69xx series is slightly larger. The 60xx series is a light series, 62xx is medium, and 63xx is heavy, with progressively larger OD and higher load ratings for the same bore size. Choose based on your load requirements and available housing space.
Yes, provided the OD matches the housing bore. These bearings follow standard ISO dimensional tolerances, so they are interchangeable with other bearings of the same designation from any manufacturer. Always verify the fit class (clearance or interference) required by your housing design — most general-purpose housings use a sliding or light interference fit on the OD.
🛒 Select your Bearing Size and ID x OD x T(mm) above, then add to cart.
