SKF7006ACDP4ADGBSuper-Precision Angular Contact Ball Bearing Pair – 30 mm Bore, 55 mm OD, 13 mm Width, 25°, ABEC 7

Product Description

What this part is

SKF 7006 ACD/P4A super-precision single-row angular contact ball bearings, universally matchable. Bore Diameter: 30 mm. Outside Diameter: 55 mm. Overall Width: 13 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4A. Preload: light (DGB). 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: 70. Base Number: 7006.

Decoding the designation

7006 is the ISO 70 light series at a 30 mm bore. ACD is SKF’s 25° super-precision design. DGB — universally matchable, light preload. P4A is the super-precision tolerance class. Written as 7006-ACDGB/P4A, 7006-ACD-P4A-DGB and 7006 ACD/P4A.

What these specs mean in practice

Dynamic Load Rating: 13,800 N per bearing. Static Load Rating: 7,650 N per bearing. Limiting Speed: 28,000 rpm grease; 43,000 rpm oil-air. A 30 mm bore in the 70 light section with a small 7.938 mm ball set is what makes those speeds reachable. The 25° contact angle carries more thrust and gives more axial stiffness than a 15° bearing of the same size. Light preload gives more axial stiffness than the extra light setting.

Quantity and configuration

Unit Quantity: 2 Pcs. Two universally matchable bearings ship together, so the pair can be set back-to-back, face-to-face or in tandem and reach the published light preload without shims. Ball complement: 14 balls of 7.938 mm diameter per bearing. Load-centre distance a: 16.6 mm from the side face.

Mounting data

Shaft abutment diameter da and db: 34.6 mm minimum. Housing abutment diameter Da: 50.4 mm maximum. Housing abutment diameter Db: 53 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: 39.3 mm. Reference grease quantity: 1.6 cm³ per bearing.

Interchange guidance

The 25° super-precision 7006 is built by every spindle-bearing maker and the angle codes translate. Cross-Reference 1: FAG B7006-E-T-P4S, where the E on a B70 designation is the 25° angle. Cross-Reference 2: NSK 7006A5, where A5 is 25°. Cross-Reference 3: RHP 7006 A5. Cross-Reference 4: SNFA EX30 7CE3, where CE3 is 25°. Cross-Reference 5: SKF 7006 CD/P4A, the same envelope and precision at a 15° contact angle and therefore a related size rather than a substitution. Searchable forms: 7006-ACDGB/P4A, 7006-ACD-P4A-DGB, 7006ACDGBP4A, 7006 ACD, 7006.