MRC307RMedium Series Angular Contact Ball Bearing – 35 mm Bore x 80 mm OD x 21 mm Width, 15°, Counterbored Outer Ring

Product Description

What this part is

MRC 307R single-row angular contact ball bearing, medium series, with a counterbored outer ring. Bore: 35 mm. Outside Diameter: 80 mm. Overall Width: 21 mm. Contact Angle: 15°. Number Of Rows: 1. Rolling Elements: Balls. Bore Type: Straight. Closure Type: Open both faces. Material: Chrome steel. Unit Quantity: 1 Pc.

Decoding the designation

300 — MRC’s medium series. At a 35 mm bore the medium series gives an 80 mm outside diameter and a 21 mm width, with a heavier ball complement than the light series on the same shaft.

07 — the bore code. Multiplied by five it gives Bore: 35 mm.

R — Contact Angle: 15°, with a counterbored outer ring. The counterbore admits a full ball complement past a low shoulder, and the high shoulder opposite carries the thrust.

What these specs mean in practice

Contact Angle: 15° is the shallow end of the angular contact range. It gives the highest speed capability of the family and the lowest heat generation, and it suits moderate one-direction thrust alongside a substantial radial load. On a medium-series section the radial rating is high for the bore, so this is the bearing for a shaft that carries real radial load and needs the axial component located as well. The counterbored outer ring makes the bearing directional and it is normally run against a second bearing facing the opposite way. Bore: 35 mm. Outside Diameter: 80 mm. Overall Width: 21 mm.

Quantity and configuration

Unit Quantity: 1 Pc. One single-row bearing, straight bore, open on both faces, counterbored outer ring.

Fitting notes

The high-shoulder side of the outer ring faces the thrust load, so the bearing is fitted with the counterbore turned away from the direction the axial force arrives from. Mounting force is applied through the ring being fitted and is never transmitted across the balls. Where two of these run opposed on one shaft, axial position is set by a spacer or by clamping to a measured end play.

Interchange guidance

35 x 80 x 21 mm is the 7307 envelope and the carton carries the 7307 cross itself. A 7307 C is the 15° execution and matches on both angle and envelope, so it is a genuine interchange. A 7307 at 25° or 40° carries different thrust capacity and stiffness on the same envelope and is a related size.

Searchable variants

307R, 307-R, 307 R, 7307, 7307-C, MRC 307R.