MRC9209U5Split Inner Ring Angular Contact Ball Bearing – 45 mm Bore x 85 mm OD x 19 mm Width, 29°, ABEC 5

Product Description

What this part is

MRC 9209U5 single-row angular contact ball bearing with a split inner ring, light series. Bore: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm. Contact Angle: 29°. Precision Class: ABEC 5. Number Of Rows: 1. Rolling Elements: Balls. Bore Type: Straight. Inner Ring Construction: Split. Closure Type: Open both faces. Material: Chrome steel. Unit Quantity: 1 Pc.

Decoding the designation

9200 — MRC’s split-ring angular contact light series. The inner ring is made in two halves that clamp together on the shaft, which is what lets the bearing hold a full ball complement on an unbroken outer raceway.

09 — the bore code. Multiplied by five it gives Bore: 45 mm.

U — split inner ring, Contact Angle: 29°. Both halves of the inner ring carry a raceway shoulder, so the bearing takes thrust in one direction through a full ball complement rather than the reduced complement a Conrad assembly allows.

What these specs mean in practice

A split inner ring buys ball count. Because the inner ring is assembled around the balls rather than the balls being fed past a shoulder, the raceway can be filled, and a full complement at Contact Angle: 29° is what gives this family its thrust rating for the envelope. The 29° angle sits in the middle of the angular contact range: more thrust capacity than a 15° execution, more speed headroom than a 40° one. Precision Class: ABEC 5 tightens bore and outside diameter tolerance and, more importantly, radial and axial runout, so shaft position becomes a specification rather than a consequence. Bore: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm.

Quantity and configuration

Unit Quantity: 1 Pc. Single row, straight bore, split inner ring, open on both faces.

Fitting notes

The two halves of the inner ring are matched to each other and to their outer ring, and they are kept together and in their original orientation. The inner ring halves are clamped square against the shaft shoulder by the adjacent component, since it is that clamp that closes the split and sets the raceway geometry. Mounting force is applied through the ring being fitted and is never transmitted across the balls. A precision-class bearing expects ground and measured shaft and housing seats and clean handling.

Interchange guidance

45 x 85 x 19 mm is the 209 envelope, so a bearing of that size will enter the same seat. A substitution has to agree on the 29° contact angle, the ABEC 5 class and the split inner ring together. A one-piece-inner-ring angular contact bearing on the same envelope carries a different ball complement and a different thrust rating, so it is a related size.

Stock and customer references

524718-IB and K500A016V are distributor and customer stock numbers recorded against this part.

Searchable variants

9209U5, 9209-U5, 9209 U5, 9209U, 524718-IB, K500A016V, MRC 9209U5.