# How to Specify NN3008K Without Mixing Nearby Parts
Look-alike part numbers are the usual way a stores ticket goes wrong on a double-row cylindrical roller bearing for CNC machines. Do not substitute NN3008 (straight bore) if the spindle calls for a tapered K bore, or NN3007/NN3009. The K suffix means a tapered bore. Confirm W33, precision, and whether a sleeve is required before the spindle is assembled.
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NN3008K is listed as a double-row cylindrical roller bearing for CNC machines. 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.
Review NN3008K bearing 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.