RBCHeavy Duty Needle Roller Bearing with Inner Ring — 4-1/2 in Bore, 7 in OD, 2-1/2 in Width

Product Description

What this part is

This listing pairs an RBC SJ6918 heavy duty Pitchlign needle roller bearing with its matching RBC IR6918 inner ring. The SJ6918 is a machined outer ring with caged needle rollers; the IR6918 inner ring provides the hardened raceway, giving a 4-1/2 in bore.

Decoding the designation

SJ6918 — RBC Pitchlign heavy duty needle roller bearing without inner ring, 5-1/2 in roller bore, 7 in outside diameter, 2-1/2 in width.

IR6918 — RBC inner ring for the 6918 size, 4-1/2 in bore, 5-1/2 in outside diameter.

What these specs mean in practice

Bore Diameter: 4-1/2 in (with IR6918 inner ring). Outside Diameter: 7 in. Overall Width: 2-1/2 in. Roller Bore of SJ6918: 5-1/2 in. Rolling Elements: Needle Roller. Number Of Rows: 1.

The needle design carries high radial load in a small radial section.

Quantity and configuration

Two pieces: one SJ6918 bearing and one IR6918 inner ring. Condition: new old stock, open box, surface rust shown in pictures.

Interchange guidance

RBC’s TandemRoller TJ6918 is the uprated successor on the same 5-1/2 x 7 x 2-1/2 in envelope, with two rollers per cage pocket.