SKF7214ACDP4ADGASuper-Precision Angular Contact Ball Bearing Pair – 70 mm Bore, 125 mm OD, 24 mm Width, 25°, ABEC 7

Product Description

What this part is

SKF 7214 ACD/P4A super-precision single-row angular contact ball bearings, universally matchable. Bore Diameter: 70 mm. Outside Diameter: 125 mm. Overall Width: 24 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4A. Preload: extra light (DGA). Internal Clearance: N/A. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Cylindrical. Closure Type: Open. Bearing Material: Bearing steel. Unit Quantity: 2 Pcs. Series: 72. Base Number: 7214.

Decoding the designation

7214 is the ISO 72 series at a 70 mm bore. ACD is SKF’s 25° super-precision design. DGA — universally matchable, extra light preload. P4A is the super-precision tolerance class. Written as 7214-ACD/P4ADGA, 7214-ACD-P4A-DGA and 7214 ACD/P4A.

What these specs mean in practice

Dynamic Load Rating: 66,300 N per bearing. Static Load Rating: 55,000 N per bearing. Limiting Speed: 9,500 rpm grease; 16,000 rpm oil-air. A 25° contact angle angles the load path further toward the axis than a 15° bearing, so it carries more thrust and gives higher axial stiffness, and gives up top speed in exchange. Universal matchability means the two rings can be set back-to-back, face-to-face or in tandem and the preload lands on the published class without shims or selective grinding.

Quantity and configuration

Unit Quantity: 2 Pcs. Two universally matchable bearings ship together, so the pair can be arranged in any of the three standard configurations. Ball complement: 16 balls of 15.875 mm diameter per bearing. Load-centre distance a: 34.9 mm from the side face.

Mounting data

Shaft abutment diameter da and db: 79 mm minimum. Housing abutment diameter Da: 116 mm maximum. Housing abutment diameter Db: 120.8 mm maximum. Shaft fillet radius ra: 1.5 mm maximum. Housing fillet radius rb: 0.6 mm maximum. Bearing chamfers r1,2: 1.5 mm minimum and r3,4: 0.6 mm minimum. Oil nozzle position dn: 91.6 mm. Reference grease quantity: 13.7 cm³ per bearing.

Interchange guidance

The 25° super-precision 7214 is built by every spindle-bearing maker and the angle codes translate. Cross-Reference 1: FAG B7214-E-T-P4S, where the E on a B70 designation is the 25° angle. Cross-Reference 2: NSK 7214A5, where A5 is 25°. Cross-Reference 3: RHP 7214 A5. Cross-Reference 4: SKF 7214 CD/P4A, the same envelope and precision at a 15° contact angle and therefore a related size rather than a substitution. Searchable forms: 7214-ACD/P4ADGA, 7214-ACD-P4A-DGA, 7214ACDP4ADGA, 7214 ACD, 7214.