# How to Specify 30310 Without Mixing Nearby Parts
Look-alike part numbers are the usual way a stores ticket goes wrong on a metric tapered roller bearing for crushers. Do not substitute 32210 (50×90×24.75 mm) or 30309/30311. 30310 is 50×110×29.25 mm — a different OD and width from 32210. P6 and a complete set are listed; specify clearance when you order.
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The envelope to write on the ticket is 50 × 110 × 29.25 mm. That geometry belongs to 30310, a metric tapered roller bearing for crushers. Measure the removed part or the housing before you trust a faded stamp.
Review 30310 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.
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