MRC215RDBAngular Contact Ball Bearing – 75 mm ID, 130 mm OD, 25 mm Width, Open seal, 15° contact angle.

Product Description

What this part is: MRC 215RDB is a single-row angular contact ball bearing in the 200 light series. The envelope is 75 mm bore × 130 mm outside diameter × 25 mm section width per bearing. The rings are open, with no shield, seal or snap ring groove. Rolling elements are chrome steel balls carried in a machined cage. Decoding the designation: Series: 200, the light section of the MRC angular contact range. Bore code 15 sets the bore at 75 mm. Type letter R gives a 15° contact angle with a counterbored outer ring. RDB is the duplex execution: a pair ground for back-to-back mounting with preload built in at the factory. Contact Angle: 15°. Bore / Shaft Size: 75 mm. Outside Diameter: 130 mm. Overall Width: 25 mm per bearing. What these specs mean in practice: A 15° contact angle carries less thrust and more speed than a 40° angle, and it holds the shaft closer to the radial line, which suits spindles and high-speed shafts where running accuracy matters more than peak axial load. The counterbored outer ring puts the full ball complement on one shoulder, so thrust travels in one direction through each bearing and the back-to-back pair takes it in both. Preload removes the running clearance, so shaft float and running vibration both drop. Internal Clearance: N/A on a preloaded set. Limiting Speed: 5600 rpm. Lubricant: Oil. Quantity and configuration: Two pieces ship, a factory matched back-to-back pair. Unit Quantity: 2. Total stacked width across the pair: 50 mm. Number Of Rows: 1 per bearing. Mounting Arrangement: back-to-back, DB. The carton and ring marking read 215-RDB, with 7215DU carried alongside as an MRC marking variant. Interchange guidance: The 75 × 130 × 25 mm envelope is the ISO 7215 boundary size. SKF 7215 CD matches the envelope and the 15° angle. A 7215 in a DF face-to-face arrangement is a related size, different ground offset and load path. Searchable variants: 215RDB, 215 RDB, 215-RDB, 7215DU, 7215 DU, 7215. Origin: Country of origin: United States.