DODGESER 204 SCFour-Bolt Square Flange Mounted Ball Bearing Unit, 5/8″ Bore, Setscrew Locking, Non-Expansion

Product Description

What this part is

A Dodge setscrew mounted ball bearing unit in a four-bolt square flange housing for a 5/8 in shaft, carrying Dodge part number 124099. The insert is a 204-series wide-inner-ring ball bearing with a spherical outer race, self-aligning in the housing bore, locked to the shaft by setscrews in the extended inner ring.

Decoding the designation

204 – metric-envelope insert series; in the inch range this is the 5/8 in to 3/4 in shaft group, here bored 5/8 in
SC – Dodge setscrew locking, normal duty
F4B – four-bolt flange housing (Dodge F2B is the two-bolt style; bolt count is part of the housing style, not a variant of it)
124099 – Dodge/Baldor stock number for the assembled unit

What these specs mean in practice

A four-bolt square flange mounts against a face perpendicular to the shaft — a gearbox end plate, a bulkhead, a side frame with a through-hole. It is not interchangeable with a pillow block, and it is not interchangeable with a two-bolt oval flange: the bolt pattern is different and so is the load path. The four-bolt pattern spreads the load over a wider footprint than a two-bolt flange, which is why it is preferred where the flange face carries belt pull or overhung load.

Setscrew locking is fast to install and service and holds well under steady unidirectional load. It marks the shaft, and on reversing or shock-loaded drives an eccentric collar or a concentric clamp unit holds better. The self-aligning spherical insert absorbs modest mounting misalignment.

Published mounting data

Shaft size: 5/8 in
Housing: four-bolt square flange, cast iron
Bolt hole centre to centre: 2.13 in · bolt size 3/8 in
Locking: setscrew · Expansion: non-expansion (locating)
Rolling elements: single row of balls, wide inner ring insert

Quantity and configuration

One complete unit — flange housing with the bearing insert fitted. No shaft, no mounting bolts.

Fitting notes

Verify the 2.13 in bolt centres against the machine face before ordering; Dodge SC, SXR and SCM housings in the same bore size do not all share a bolt pattern. Slide the unit onto a clean shaft, seat the flange flush, tighten the flange bolts, then tighten the insert setscrews evenly so the inner ring grips concentrically. Only one bearing on a shaft should be a locating unit.

Interchange guidance

Other makers’ 204-series setscrew four-bolt flange units cover the same shaft size but usually differ in bolt centres and flange thickness — treat them as related sizes and confirm the pattern rather than assuming a drop-in. A Dodge F2B in the same bore is a different housing style, not an equivalent, and the bare insert on its own is a different item from this assembled unit.