NSK7214AAngular Contact Ball Bearing – 70 mm Bore x 125 mm OD x 24 mm Wide, 30° Contact Angle, Open, Pressed Steel Cage

Product Description

What this part is: NSK 7214A single-row angular contact ball bearing, ISO 7214 size. Bore: 70 mm. Outside Diameter: 125 mm. Width: 24 mm. Bearing Type: Single-row angular contact ball bearing. Number of Rows: 1. Rolling Elements: Ball. Contact Angle: 30°. Closure Type: Open. Cage Material: Pressed steel. Precision Class: Normal (ISO P0). Dynamic Load Rating: 84 kN. Static Load Rating: 63.5 kN. Limiting Speed: 4,500 rpm on grease, 6,300 rpm on oil. Item Weight: 1.11 kg. Decoding the designation: 7214 — NSK’s number for the ISO 7214 size, 70 x 125 x 24 mm, in the 72 medium dimension series. A — 30° contact angle. W — pressed steel cage. What these specs mean in practice: Contact Angle: 30°. The raceways are offset so the ball load line runs at 30° to the radial plane. That is NSK’s middle angle: it carries substantially more thrust than a 15° bearing and runs faster and cooler than a 40°. A single row takes thrust in one direction only, so a 30° bearing is normally paired against a second bearing or a shoulder that resists the opposite direction. Dynamic Load Rating: 84 kN. Static Load Rating: 63.5 kN. The 72 medium series puts a heavier ball complement on a 70 mm shaft than the 70-series equivalent, which is where the capacity comes from. Cage Material: Pressed steel. A ribbon-type pressed steel cage keeps mass and windage low and tolerates the grease-lubricated speeds this bearing is rated for. Limiting Speed: 4,500 rpm on grease and 6,300 rpm on an oil bath. The gap between the two is the difference in heat removal, not in the bearing. Mounting data: Effective Load Centre (a): 40.1 mm from the bearing face. Shaft Abutment Diameter (da min): 79 mm. Housing Abutment Diameter (Da max): 116 mm. Maximum Abutment Fillet Radius (ra max): 1.5 mm. Bearing Chamfer (r min): 1.5 mm. Quantity and configuration: Unit Quantity: 1 Pc. One open bearing, supplied as an individual bearing. Interchange guidance: The 70 x 125 x 24 mm envelope is ISO standard, so 7214 bearings from other makers drop into the same seats. The contact angle is what decides whether one is a true substitute: a 7214A or 7214AW is 30°, a 7214B is 40°, and a 7214C is 15°. A 7214E in the RHP and Fafnir schemes is 25° on the same envelope, which makes it a related size rather than a straight swap. Searchable variants of the part number: 7214A, 7214 A, 7214A-W, 7214AW, 7214AWDBCP15, 7214A W DB CP15.