MRC7306DUAngular Contact Ball Bearing – 30 mm Bore x 72 mm OD x 19 mm Wide, 29°, Universally Ground, Open

Product Description

What this part is

MRC 7306DU single-row angular contact ball bearing, 30 mm bore, 72 mm outside diameter, 19 mm wide. Bore Diameter: 30 mm. Outside Diameter: 72 mm. Overall Width: 19 mm. Contact Angle: 29°. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome steel. Series: MRC 7300 heavy. Unit Quantity: 1 Pc. GTIN: 097741017343.

Decoding the designation

7306 — MRC’s 7300 heavy angular contact series at bore code 06, giving a 30 mm bore in a 72 mm housing.

No type letter — the plain MRC 7000-series execution, which carries a 29° contact angle. An R in that position would make it 15° with a counterbored outer ring, and a P would make it 40°.

DU — universally ground, supplied as one half of a matchable duplex pair. The ring faces are ground so that two bearings of the designation stack without shims and reach their intended preload on assembly.

What these specs mean in practice

Contact Angle: 29°. The line of force through the balls sits closer to the axis than on a 40° bearing and further from it than on a 15°, so the bearing carries more thrust than a spindle bearing and turns faster than a thrust-biased one.

Universally ground faces allow three arrangements from the same part number: back-to-back for moment stiffness across a wide effective spread, face-to-face where shaft and housing grow at different rates, and tandem where one-way thrust is shared between two rows.

Single row, so thrust runs one way per bearing. A second bearing opposed to it locates the shaft in both directions.

Mounting data

Bore Type: Straight, 30 mm shaft seat. Housing bore 72 mm. Overall Width: 19 mm per bearing, so a duplex pair of this designation stacks to 38 mm across the set.

Quantity and configuration

Unit Quantity: 1 Pc. One universally ground bearing, ready to pair with another of the same designation.

Interchange guidance

The 7306 boundary envelope is an ISO standard at 30 x 72 x 19 mm, so every number below fits the same housing bore and shaft seat. Contact angle is what varies: the makers’ standard executions on this size run 30° or 40° against this bearing’s 29°, and each cross-reference states which. Searchable variants of the number: 7306DU, 7306-DU, 7306 DU.