ROLLWAYEP61213UK104NJ213 Single-Row Cylindrical Roller Bearing 65x120x23 mm, One-Direction Axial Location, Separable Inner Ring

Product Description

What this part is

A single-row cylindrical roller bearing in the ISO 213 size, 65 mm bore, 120 mm outside diameter, 23 mm width. The rollers run in line contact against the raceways rather than point contact, which is why a cylindrical roller bearing of this envelope carries roughly four times the radial load of a same-size deep-groove ball bearing. It takes thrust in the one direction the ring ribs are arranged to carry it, which is what the NJ configuration provides.

Decoding the designation

Rollway EP61213UK104: the legacy Rollway internal designation. The 61213 size code corresponds to the 65 mm bore in the 1200/213 series; the U denotes the single-rib inner ring style that makes this an NJ-type bearing.

NJ213: the ISO/DIN 5412 equivalent designation, and the number most buyers will search. NJ means one rib machined onto the inner ring and two ribs on the outer ring.

N, NU, NJ, NUP: the rib arrangement family. NU floats axially in both directions; NJ locates in one direction; NUP locates in both via a loose thrust collar. Substituting across these is a design change rather than a like-for-like swap.

What these specs mean in practice

NJ is the workhorse choice for the drive end of a gearbox shaft. Because the inner ring is separable, it can be heated and shrunk or pressed onto the shaft as its own operation, with the outer ring and roller assembly brought to it afterwards — far less risk of brinelling the raceways than driving a one-piece bearing into place. The single inner rib gives one-directional axial location, which is usually enough where a second bearing at the far end handles the opposite direction.

At 23 mm the 213 size is a narrow-section bearing for its diameter, so it suits positions where axial space is tight but radial load is high.

Dimensions and configuration

Bore d: 65 mm.

Outside diameter D: 120 mm.

Width B: 23 mm.

Number Of Rows: 1.

Rib arrangement: one rib inner ring, two ribs outer ring (NJ, one-direction location).

Inner ring: separable.

Rolling Elements: cylindrical rollers, caged.

Closure Type: Open.

Internal Clearance: CN (normal); no clearance suffix appears on this designation.

Unit Quantity: 1 Pc.

Quantity and configuration

Unit Quantity: 1 Pc. Priced and sold as one bearing, open, with a separable inner ring.

Interchange guidance

The ISO base number NJ213 is the safe search term across brands: SKF NJ 213 ECJ, FAG NJ213-E-XL-TVP2, NSK NJ213W, NTN NJ213, Timken NJ213E, Koyo NJ213. Cage material and internal clearance vary between those, and NJ and NU differ in how the bearing locates the shaft, so both are worth matching explicitly.

Rollway is now part of the Regal Rexnord portfolio, so buyers chasing current-production equivalents will be pointed at Regal Rexnord or the ISO cross rather than a Rollway catalogue number.

The number 1112178C91 also circulates against this part and is carried here as a search aid. The C91 suffix format is characteristic of Navistar / International Truck part numbering.