DodgeP2B-SXRB-102 131835Two-Bolt Low-Base Pillow Block Bearing Unit, 1-1/8 in Shaft, Eccentric Locking Collar, 1.56 in Centre Height

Product Description

What this part is

A Dodge P2B-SXRB-102 mounted ball bearing unit: a two-bolt cast iron pillow block on a low base, carrying a sealed single-row ball insert locked to the shaft by an eccentric collar. Bore is 1-1/8 in. Dodge stock number 131835.

Decoding the designation

P2B — two-bolt pillow block housing
SXR — sealed ball bearing insert with an eccentric locking collar
B — low backing, a reduced base-to-bore centre height; Dodge catalogues P2B-SXR and P2B-SXRB as separate numbers
102 — bore code in sixteenths above one inch: 1 + 2/16 = 1-1/8 in
131835 — Dodge stock number for the same unit

Housing style and bolt pattern

Two-bolt pillow block, low base. Base-to-bore centre height is 1.56 in. The low-backing casting puts the shaft centreline closer to the mounting surface than a standard P2B of the same bore, which is what makes it a distinct catalogue number rather than a substitution.

What these specs mean in practice

The eccentric collar locks by driving the offset collar face against the offset counterbore in the extended inner ring, then setting a screw onto the shaft. It grips harder in the direction of rotation than a plain setscrew and needs no keyway or shoulder, so commercial cold-drawn shafting is adequate. Against a Grip-Tight or adapter-sleeve unit it gives up concentricity, which places these units in conveyor, fan and general line-shaft duty.

The insert here runs balls, so load is carried at points rather than along lines: high speed capability and low friction, with radial capacity below a spherical-roller insert of the same envelope such as a Dodge S-2000.

Published specifications

Shaft size: 1-1/8 in (28.575 mm)
Bore code: 102
Housing style: two-bolt pillow block, low backing
Base to bore centreline: 1.56 in
Housing material: cast iron
Rolling element: ball, single row
Locking method: eccentric locking collar
Closure: sealed insert
Expansion: non-expansion
Dodge stock number: 131835

Quantity and configuration

1 Pc. Complete unit: housing, ball insert and eccentric locking collar assembled.

Fitting notes

The block seats on a flat rigid face, shimmed where the surface is uneven. Bolts stay slack until the shaft is through both blocks so the sphered insert seat can find its own alignment, then the collar is driven in the direction of shaft rotation and its setscrew tightened.

Interchange guidance

The standard-height equivalent is the Dodge P2B-SXR-102, and the same unit with a grease fitting is the P2B-SXRB-102-FF. Inch two-bolt pillow blocks of 1-1/8 in bore with an eccentric collar from other makers — SKF SY..FM, SealMaster MP series — match the shaft and the locking method, but bolt centres and centre height vary between makers, so they are related sizes unless those two dimensions are matched. A Dodge S-2000 unit of the same bore carries a double-row spherical roller insert and is a different part.