# What the RN309E-11Y Listing Actually Covers

RN309E-11Y is listed as an eccentric / XRT reducer cylindrical roller (no outer ring). 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.

Typical duty includes cycloidal and XRT reducers that call for this eccentric RN bearing. Material on this listing is bearing steel. If your equipment sits outside that range, say so on the request rather than forcing a familiar part number.

Do not substitute a standard NJ309 or N309 with an outer ring, which will not fit the same reducer pocket. RN bearings are supplied without an outer ring so the housing raceway is the outer path. Confirm the 11Y suffix and the reducer model.

Review RN309E-11Y 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.