# NJ and NUP Flanges on Gearbox Intermediate Shafts

NJ locates one way with a single flange; NUP uses a loose ring. Wrong flange direction shows up as gear face wear.

The selection guide clarifies which series takes axial load. For sizing and interchange notes, see NU NUP selection notes and the full write-up on TFL Bearing CRB.

Check retainer rings that travel with NUP. Buyers who need OEM-fit replacements can also open Read NU vs NUP guide before they freeze a drawing or RFQ.

Keep notes on fit, grease, and duty cycle with the part number so the next rebuild does not depend on memory alone.

Shandong TFL Bearing Co., Ltd keeps Portuguese product pages aligned with English engineering notes so global plants share one cross-reference language.