Deep Groove Ball Bearings Stainless Steel Miniature Shielded Bearing I.D 10-70mm

304 Stainless Steel offers excellent corrosion resistance in wet, humid, and mildly acidic environments and is the more common choice for food processing, laboratory, and general industrial use. 440 Stainless Steel is harder (typically 58–62 HRC after heat treatment) and provides higher radial load capacity and better wear resistance, making it preferable for higher-load or higher-speed applications where hardness matters more than maximum corrosion resistance. If your primary concern is rust prevention in a washdown environment, 304 is typically sufficient. If you need greater load capacity or surface hardness, choose 440.

"ZZ" indicates that the bearing has pressed steel shields on both sides of the bearing. These shields retain the factory-applied grease inside the bearing and prevent dust, light moisture, and particulate contamination from entering the raceway. ZZ bearings are not fully sealed (unlike RS or 2RS rubber-sealed bearings) — they are non-contact shields, which means they generate less friction and are suitable for moderate-speed applications. They are not recommended for full submersion in liquids.

Match the bearing's inner diameter (I.D.) to your shaft diameter. For example, an S6004ZZ has a 20mm bore and fits a 20mm shaft. The model number encodes the bore: for the 6000 series, the last two digits × 5 give the bore in mm for sizes 04 and above (e.g., 6004 = 04 × 5 = 20mm). For sizes 00–03, the bore is 10mm, 12mm, 15mm, and 17mm respectively. Always verify the outer diameter and width against your housing drawing to confirm fit before ordering.

Stainless steel construction makes these bearings significantly more suitable for food and pharmaceutical environments than standard carbon-steel bearings, as they resist corrosion from washdown fluids, mild cleaning agents, and humidity. However, for direct food-contact applications requiring FDA-compliant lubrication, confirm that the grease specification meets your regulatory requirements. Contact us to confirm grease type if this is a critical compliance requirement for your application.

Yes. Deep groove ball bearings support radial loads as their primary function and can also accommodate moderate axial (thrust) loads in both directions. They are not designed for heavy axial-only loads — for applications with predominantly axial loading, a dedicated thrust bearing would be more appropriate. For combined radial and moderate axial loads typical of motors, fans, pumps, and conveyors, deep groove ball bearings are well-suited.

For grease-lubricated stainless steel ZZ-shielded bearings, the typical operating temperature range is −20°C to +120°C (−4°F to +248°F). Exceeding the upper limit can degrade the grease and reduce bearing life. For high-temperature applications above 120°C, contact us to confirm suitability or discuss alternative lubrication options.

This depends on your application. Many shaft assemblies use bearings in pairs (one at each end of the shaft), so a pack of 2 is often the most practical choice for a single assembly. Packs of 4 offer a better per-unit price and are ideal for production runs, maintenance stock, or multi-axis assemblies. Single units are best for prototyping or one-off replacements where you only need to replace one failed bearing.