DodgeS2212ETwo-Bolt Pillow Block Spherical Roller Bearing Unit, Expansion Type, Cast Iron Housing, Relubricatable

Product Description

What this part is

A Dodge two-bolt cast iron pillow block fitted with a double-row spherical roller bearing insert, expansion type. It bolts down onto a horizontal base or bearing pedestal and carries a rotating shaft in a self-aligning spherical roller element. The carton is the original Dodge / Reliance Electric, Master, Reeves box, marked SIZE S2212E PIL BLK and STK# 042776, with the internal Dodge print number 1736060-096. The unit is bagged, unused, with the Dodge spherical roller bearing instruction sheet still in the carton.

Dodge’s published nomenclature reserves P2B for a two-bolt-base cast iron pillow block and P4B for a four-bolt-base pillow block, while flange housings carry F4S for a four-bolt square flange, F4R and F3R for round four- and three-bolt flanges, and FC for a piloted flanged cartridge.

Decoding the designation

S: Dodge’s spherical roller mounted bearing line, designated S2 for S-2000 in the current catalogue. 2212: the double-row spherical roller insert size; Dodge lists its S-2000 units against insert numbers in this series (22208, 22209, 22210, 22211, 22213, 22215, 22218, 22220, 22222), so 2212 reads as the 22212 insert rather than as a housing bore code. E: expansion. Dodge publishes this suffix explicitly: “E = Expansion Type Bearing – If E Does Not Appear, Bearing Is Non Expansion Type.”

Expansion versus non-expansion

An expansion bearing does not locate the shaft axially. The outer ring is free to creep in the housing bore by a designed amount, so the shaft can grow and shrink lengthwise through the bearing as it heats and cools. A non-expansion bearing fixes the shaft’s axial position and takes thrust.

On any shaft carried in two or more mounted units, one bearing locates and every other one floats. This unit is the floating position on the shaft. Dodge states this family is field convertible between non-expansion and expansion in both directions, and publishes expansion capability of up to 3/8 in (9.5 mm) across the line.

Why a spherical roller and not a ball insert:
A double-row spherical roller insert suits heavy load and a shaft that will not stay perfectly straight. Rollers give line contact rather than a ball’s point contact, so radial capacity for a given envelope is far higher, and the spherical outer raceway lets the two roller rows swivel to follow shaft deflection or a bearing seat that is not quite in line with its neighbour.

Dodge publishes up to 1° of misalignment capability for this line, with the seal land on the outer diameter of the inner ring maintaining full contact pressure even when misaligned.

Spherical roller pillow blocks are the standard fit on long shafts and heavily loaded ones: conveyor head and tail pulleys, screw conveyors, bucket elevators, fans and blowers, crushers, kilns, aggregate and mining equipment, and paper and process machinery.

Published data

Housing style: two-bolt base pillow block. Housing material: cast iron. Insert: double-row spherical roller, 22212 series. Expansion type: expansion (floating), outer ring free to move axially in the housing. Misalignment capability: up to 1°, published for the family. Expansion capability: up to 3/8 in / 9.5 mm, published for the family. Field convertible between expansion and non-expansion. Lubrication: factory lubricated, sealed and adjusted; relubricatable. Grease fitting: 1/8-27 NPT hydraulic fitting, standard across all sizes in this family. Locking to shaft: collar mount. Dodge stock / order number: 042776. Dodge internal print number on carton: 1736060-096. Country of manufacture: made in USA, per the carton.

Mounting data

The unit arrives factory lubricated, sealed and adjusted, and no bearing setting is required. A pillow block carries load down through its feet; where the load pulls the housing away from the base, the mounting bolts, the pedestal and the housing capacity govern rather than the bearing rating.

The pedestal or base is flat, in the same plane as the other bearing seats on the shaft, and rigid. The misalignment latitude of a spherical roller unit covers shaft deflection under load.

Interchange guidance

Cross-references and search forms: S2212E, S-2212-E, S2212-E, S 2212 E, 042776, 1736060-096, 22212, insert 22212. Current Dodge equivalents are the S-2000 two-bolt pillow blocks P2B-S2-xxxRE (TRIDENT triple-lip rubbing seal, expansion) and P2B-S2-xxxLE (labyrinth metallic seal, expansion), and the Type-E-dimensioned versions EP2B-S2-xxxRE and EP2B-S2-xxxLE, which put an S-2000 spherical insert into a housing that shares Type E bolt and centreline dimensions. Four-bolt equivalents are P4B-S2 and EP4B-S2. The designation P2B-E-234 from the earlier listing is retained here for search continuity.

Obsolescence trail: Dodge mounted bearings passed from Reliance Electric to Rockwell Automation, then to Baldor, then to ABB, and are now Dodge Industrial under RBC Bearings. The Dodge, Master and Reeves branding on this carton dates it to the Reliance Electric era. Regal Rexnord holds the neighbouring Link-Belt and Rexnord mounted bearing lines and is a separate company.