DODGEF2B-GT-1022-Bolt Flange Unit – 1.125 in Bore, 2 bolt, Cast Iron, Standard Duty, Non-Expanding

Product Description

What this part is

Dodge F2B-GT-102 flange-mount ball bearing unit, Dodge stock number 129307. Two-bolt cast iron flange housing carrying a single-row ball bearing insert with a spherical outer ring, 1-1/8 in (28.58 mm) shaft size, Grip-Tight concentric locking adapter, contact seals on both sides, grease lubricated with a relubrication fitting.

Decoding the designation

F2B is the Dodge two-bolt flange housing style. GT is Grip-Tight, Dodge’s tapered concentric adapter that clamps the full circumference of the shaft. 102 is the shaft-size code for 1-1/8 in. 129307 is the Dodge stock number stamped on the carton and used by distributors.

Housing style and bolt pattern

Two-bolt flange bracket, surface mounted against a vertical face with the shaft passing through. Bolt hole centre-to-centre 4.59 in. Overall housing width 1.61 in. Cast iron housing with a steel bearing insert.

What these specs mean in practice

The Grip-Tight adapter grips concentrically through 360° rather than biting the shaft at one point the way a setscrew does, so runout stays low and the shaft surface is left undamaged when the unit is removed. Concentric clamping also holds against reversing and shock loads better than a setscrew collar. The spherical outer ring on the insert lets the bearing take up initial misalignment between the two mounting faces during installation. Contact seals on both faces retain grease and exclude washdown and airborne contamination. Service range −20 °C to 120 °C.

Quantity and configuration

Sold as 1 Pc. Complete unit: cast iron two-bolt flange housing, ball bearing insert, Grip-Tight adapter, and seals. Non-expansion type, so this position locates the shaft axially.

Interchange guidance

The equivalent envelope in other lines is a 1-1/8 in two-bolt flange ball bearing unit. Locking method is the variable that matters on a substitution: a setscrew or eccentric-collar unit of the same bore and bolt pattern mounts in the same holes but locates the shaft differently. Dodge’s own setscrew counterpart in this size is the F2B-SC-102, and the eccentric-collar version is the F2B-SCEZ-102.