MRCHeavy Series Angular Contact Ball Bearing – 40 mm Bore x 110 mm OD x 27 mm Width, 40°, Bronze Cage, ABEC 3

Product Description

What this part is

MRC 7408PJDU single-row angular contact ball bearing, heavy series, with both rings counterbored and a machined bronze cage, ground as a universal duplex half pair. Bore: 40 mm. Outside Diameter: 110 mm. Overall Width: 27 mm. Contact Angle: 40°. Precision Class: ABEC 3. Cage Material: Machined bronze. Cage Type: Machined. Number Of Rows: 1. Rolling Elements: Balls. Bore Type: Straight. Closure Type: Open both faces. Material: Chrome steel rings. Unit Quantity: 1 Pc.

Decoding the designation

7400 — MRC’s angular contact heavy series. At a 40 mm bore the heavy series runs to a 110 mm outside diameter and a 27 mm width, which is where its load rating comes from.

08 — the bore code. Multiplied by five it gives Bore: 40 mm.

PJ — heavy-duty execution, Contact Angle: 40°, with both the inner and the outer ring counterbored. Counterboring both rings admits the largest ball complement the envelope will hold, and the two high shoulders opposite carry the thrust.

DU — a duplex half pair, universally flush ground. Any two of this designation assemble back-to-back, face-to-face or tandem, and the flush grind sets the mounted condition directly at clamp-up.

BRZ — machined bronze cage. A one-piece bronze cage carries higher rubbing speeds and higher temperatures than a pressed steel or polymer cage, and it holds its pocket geometry under heavy thrust.

#3 — ABEC 3 tolerances, one step above standard: tighter bore, outside diameter and runout, and lower running vibration.

What these specs mean in practice

Contact Angle: 40° is the steepest angle in the standard angular contact range. It puts the load line close to the thrust axis, giving the highest one-direction thrust capacity and the highest axial stiffness of the family. Cage Material: Machined bronze is the reason this execution survives the heat that heavy thrust generates — bronze runs against steel with a low friction coefficient and tolerates marginal lubrication far better than a polymer cage. Precision Class: ABEC 3 gives closer shaft location and lower running vibration than a standard-class bearing. Bore: 40 mm. Outside Diameter: 110 mm. Overall Width: 27 mm.

Quantity and configuration

Unit Quantity: 1 Pc. One universally flush-ground duplex half pair. Two assemble into a matched set in whichever of the three duplex orientations the application calls for, and further half pairs stack into triplex and quadruplex arrangements.

Interchange guidance

ISO 7408 B is the standard-class 40° execution in the 40 x 110 x 27 mm size. The MRC 7408PJDU adds counterbored inner and outer rings, a machined bronze cage and ABEC 3 class.

Searchable variants

7408PJDU, 7408-PJ-DU, 7408 PJ DU, 7408PJDU-BRZ#3, 7408PJDU BRZ 3, MRC 7408PJDU.