SKF7009-ACDGA/P4ADSuper-Precision Angular Contact Ball Bearing – 45 mm Bore, 75 mm OD, 16 mm Width, 25°, ABEC 7

Product Description

What this part is:

SKF 7009 ACD/P4A super-precision single-row angular contact ball bearing, universally matchable. Bore Diameter: 45 mm. Outside Diameter: 75 mm. Overall Width: 16 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. Series: 70. Base Number: 7009.

Decoding the designation:

7009 is the ISO 70 light series at a 45 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 7009-ACDGA/P4AD, 7009-ACD-P4A-DGA and 7009 ACD/P4A.

What these specs mean in practice:

Dynamic Load Rating: 27,600 N. Static Load Rating: 21,600 N. Limiting Speed: 17,000 rpm grease; 26,000 rpm oil-air. A 25° contact angle tilts the load path further toward the axis than a 15° bearing, so it carries more thrust and gives higher axial stiffness while giving up some speed. Extra light preload suits positions where thermal growth and top speed matter more than rigidity. Universally matchable rings let any two of these be set back-to-back, face-to-face or in tandem and reach the published preload class without shims.

Quantity and configuration:

Unit Quantity: 1 Pc. One bearing per sale unit, open on both faces. Ball complement: 17 balls of 9.525 mm diameter. Load-centre distance a: 22.1 mm from the side face.

Mounting data:

Shaft abutment diameter da and db: 49.6 mm minimum. Housing abutment diameter Da: 70.4 mm maximum. Housing abutment diameter Db: 73 mm maximum. Shaft fillet radius ra: 1 mm maximum. Housing fillet radius rb: 0.3 mm maximum. Bearing chamfers r1,2: 1 mm minimum and r3,4: 0.3 mm minimum. Oil nozzle position dn: 56.2 mm. Reference grease quantity: 3.3 cm³ per bearing.

Interchange guidance:

The 25° super-precision 7009 is built by every spindle-bearing maker and the angle codes translate. Cross-Reference 1: FAG B7009-E-T-P4S, where the E on a B70 designation is the 25° angle. Cross-Reference 2: NSK 7009A5, where A5 is 25°. Cross-Reference 3: RHP 7009 A5. Cross-Reference 4: SKF 7009 CD/P4A, the 15° contact angle version at the same precision class, a related size rather than a substitution. Searchable forms: 7009-ACDGA/P4AD, 7009-ACD-P4A-DGA, 7009ACDGAP4A, 7009 ACD, 7009.