Dodge023553Tapered Roller Bearing Cartridge, 2″ Bore x 4.130″ Cylindrical OD, Set Screw Locking, Greasable — 43,000 lbf Static (No Housing)

Product Description

What this part is

This is a Dodge B1U-DI-200R, part number 023553: a self-contained tapered roller bearing cartridge with a 2 in bore and a 4.130 in cylindrical outside diameter, locked to the shaft by set screws and fitted for grease.

The 4.130 in outside diameter is cylindrical, which is what tells you how it mounts: it slides into a bore — either a machined bore in your own equipment, or a Dodge cartridge-style housing.

Why tapered rollers instead of a ball insert

Most 2 in bore mounted bearings are ball inserts. This one is not, and the difference is the reason it costs what it costs.

A tapered roller contacts its raceway along a line; a ball contacts at a point. Line contact spreads load over a far greater area, so a tapered roller cartridge of the same bore carries several times the load of a ball insert — here, 43,000 lbf static. The tapered geometry also means it takes substantial thrust as well as radial load, whereas a ball insert manages only light thrust.

Where that matters: conveyor head and tail pulleys carrying belt tension, screw conveyors, bucket elevators, drag chains, aggregate and grain handling, and anything shock-loaded.

The trade is speed: 3,050 rpm maximum. That is ample for conveyor and process shafts and well short of a motor-speed application, which is exactly the split these are designed around.

Decoding the designation

023553: Dodge’s stock number, and the number most distributors list against.

B1U: the Dodge cartridge unit family designation.

DI: internal design code within the B1U family.

200: bore size code — here 2.000 in.

R: trailing design/variant code.

DI and R are Dodge’s own internal codes, reproduced exactly as marked. Match B1U-DI-200R against your parts list rather than against a shortened form.

Published data

Bore: 2.000 in.

Outside diameter: 4.130 in, cylindrical.

Bore length through the inner race: 3.500 in.

Static load capacity: 43,000 lbf.

Maximum speed: 3,050 rpm.

Rolling elements: Tapered rollers.

Locking method: Set screws.

Lubrication: Greasable, grease fitting provided.

The 3.500 in bore length is worth noting alongside the 2 in bore. That is a long inner race for the bore size, and it is deliberate: a long engagement on the shaft resists the tilting moment that a heavily loaded pulley or sprocket applies, and it gives the set screws a wide base to grip. The bearing station therefore uses 3.5 in of clean, straight, correctly sized shaft.

Set-screw locking and the greasable design

Set screws are the simplest shaft-locking method and the right one for most conveyor duty: no adapter sleeve, no tapered seat, no drive-up measurement. Two screws bear on the shaft at an angle to one another. For unidirectional conveyor and process shafts, set screws are proven and serviceable; a reversing or heavily shock-loaded drive is better served by a concentric or eccentric locking collar.

Being greasable rather than sealed-for-life is a genuine advantage in dirty duty. A tapered roller cartridge in a grain elevator or an aggregate plant lives on its relubrication schedule: fresh grease purges contaminants out past the seals rather than trapping them against the rollers.

Quantity and configuration

Cartridge only, sold individually. The matching Dodge cartridge housing is a separate part.

Interchange guidance

Search forms include 023553, Dodge 023553, B1U-DI-200R, B1UDI200R, B1U DI 200R, B1UDI200R/023553, B-1 200. Related Dodge numbers: 023561 / B1U-DI-300R (3 in bore, same family) and 023343 (pillow block roller bearing unit, 2-11/16 in bore). The Dodge brand has moved through Rockwell, Reliance, Baldor and ABB ownership and now trades as Dodge Industrial — a machine originally specified with Rockwell or Baldor Dodge mounted bearings is still supported under Dodge numbers.