# Field Notes on SMR63ZZ miniature stainless steel deep groove ball bearing
SMR63ZZ is listed as a miniature stainless steel deep groove ball bearing. Because a public millimetre sheet is thin on some catalog pages, confirm bore, outside diameter, and width against your drawing or the live product listing.
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Typical duty includes instruments and other compact, corrosion-aware mechanisms. Material on this listing is stainless steel. If your equipment sits outside that range, say so on the request rather than forcing a familiar part number.
Do not substitute a chrome-steel MR63 or another SMR miniature with a different envelope. ZZ shields are part of this specification. Measure bore, OD, and width; do not issue a nearby SMR size from a mixed miniature drawer.
Review SMR63ZZ on the TFL Bearing Made-in-China listing. Shandong TFL Bearing Co., Ltd can confirm stock, packing, and any OEM marking once the drawing or sample is attached.