SKF7004 CD/P4ASuper Precision Angular Contact Ball Bearing – 20 mm ID, 42 mm OD, 12 mm Width, Open, 15° Contact Angle, ABEC 7.

Product Description

What this part is: SKF 7004 CD/P4A super-precision angular contact ball bearing. Bore: 20 mm. Outside diameter: 42 mm. Width: 12 mm. Series: 7000 (ISO 70xx light series). Single row, open on both faces. Contact Angle: 15°. Precision Class: P4A, equivalent to ABEC 7. Country of origin on this item: Italy. Decoding the designation: CD: 15° contact angle in SKF’s super-precision designation system. P4A: SKF’s super-precision tolerance class, ABEC 7. Bore Type: Straight. Cage Material: Phenolic. The ISO base number for this envelope is 7004. Published ratings: Dynamic Load Rating: 10.4 kN (2,338 lbf). Static Load Rating: 5.3 kN (1,191 lbf). Limiting Speed: 56,000 rpm. Operating temperature range: −30 °C to 120 °C. Item weight: 0.15 lb. What these specs mean in practice: A 15° contact angle is the high-speed choice of the super-precision range: it favours radial stiffness and rotational speed over thrust capacity, which is why a 20 mm bore in this execution reaches 56,000 rpm. The 70xx light series keeps the cross-section slim, so the bearing suits a compact spindle nose. P4A tolerance tightens bore, outside diameter and raceway runout to ABEC 7, so shaft location repeats closely and running vibration is low. The 120 °C ceiling is the phenolic cage material limit rather than a limit of the rings. Quantity and configuration: One bearing. Unit Quantity: 1 Pc. A single angular contact bearing takes thrust in one direction, so a spindle loaded both ways runs two of them opposed, back-to-back, face-to-face or in tandem. Cross-references: FAG B7004-C-T-P4S, Fafnir 2MM9104WI-CR and NSK 7004C, all 15° super-precision on the same 20 x 42 x 12 mm size. At other contact angles: SKF 7004 ACD/P4A and NSK 7004A5 at 25°, NSK 7004A at 30°.