MRCAngular Contact Ball Bearing – Straight Bore, 3.0000 in ID, 4.5000 in OD, 0.7500 in Width, Open, 15° Contact Angle, Extra-Light Inch Series

Product Description

What this part is

MRC XLS3 single-row angular contact ball bearing, inch series. Bore: 3.0000 in (76.2 mm). Outside diameter: 4.5000 in (114.3 mm). Width: 0.7500 in (19.05 mm). Contact angle: 15°. Series: XLS, the extra-light inch section. Open on both faces, straight bore, pressed steel cage.

Decoding the designation

Series: XLS — MRC’s extra-light single-row angular contact inch series, written XLS3, XLS-3 and XLS 3. Bore code 3: 3 inches. The outer ring carries one full shoulder and one counterbored shoulder, which is what sets the 15° contact angle.

What these specs mean in practice

Basic dynamic radial load rating C: 44 200 N (9 936 lbf). Basic static radial load rating Co: 44 000 N (9 891 lbf). Grease speed rating: 5 500 rpm. Oil speed rating: 9 000 rpm. A 15° contact angle is the high-speed end of the angular contact range: it carries light to moderate thrust in one direction alongside a radial load, and runs faster and cooler than a 25° or 40° bearing of the same envelope. The extra-light section puts a large bore in a small outside diameter, which is what makes this series useful where radial space is tight.

Quantity and configuration

One piece. Single bearing, single row, open.

Fitting notes

Maximum shaft fillet radius ra: 0.08 in. Maximum housing fillet radius rb: 0.040 in. Thrust is carried in one direction only, toward the full outer ring shoulder, so the bearing is mounted with the counterbored face away from the thrust. Two bearings mounted back-to-back or face-to-face carry thrust both ways.

Related part numbers

Other makers’ inch bearings are not listed as interchangeable here; confirm contact angle, cage and counterbore side before substituting. RHP LJ 3 is a related size in the inch deep groove journal series, at a different contact geometry. Searchable forms: XLS3, XLS-3, XLS 3, X LS 3.