RHP7004ETSULP4ASuper-Precision Angular Contact Ball Bearing – 20 mm ID, 42 mm OD, 12 mm Width, Open, 25° Contact Angle, Light Preload, ABEC 7

Product Description

What this part is: RHP 7004ETSULP4A super-precision single-row angular contact ball bearing. Bore: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: carbon chrome bearing steel to SAE 52100, through hardened and heat treated. Series: 7000, ISO dimension series 10. Item Weight: 0.069 kg (0.15 lb). Decoding the designation: Contact Angle: 25°. Cage Material: laminated phenolic resin. Cage Type: machined, outer-ring guided. Preload: light. Mounting Arrangement: single universal. Precision Class: P4, equivalent to BS292 EP7, ABEC 7 and ISO Class 4. Running Accuracy – Radial And Axial Runout: P4. Searchable forms of the number: 7004ETSULP4A, 7004-E-T-UL-P4, 7004ETDULP4, 7004E. Load ratings and speed: Dynamic Load Rating: 10.6 kN (2,383 lbf). Static Load Rating: 6.25 kN (1,405 lbf). Limiting Speed: 47,400 rev/min on oil/air lubrication and 29,300 rev/min on grease. Effective load centre: 13.2 mm. Maximum Operating Temperature: 120 °C. What these specs mean in practice: A 25° contact angle carries more thrust and gives more axial stiffness than the 15° execution of the same size, and it runs slower: 47,400 rev/min against 53,600 on oil/air. Light preload develops 78 N of axial preload and 68 N/µm of axial stiffness in a back-to-back pair, against 49 N and 28 N/µm for the 15° part — the steeper angle is the choice where axial load or axial rigidity decides the spindle. The load centre sits 13.2 mm from the face, further out than the 10.1 mm of the 15° version, which changes the effective bearing spread in a paired mount. Mounting data: Shaft abutment diameter d1 min: 25 mm. Housing abutment diameter D1 max: 37 mm. Housing abutment D2 max: 39.5 mm. Bearing fillet radius r min: 0.6 mm. Fillet radius r1 min: 0.3 mm. Internal free volume: 3.1 cm³. Pitch circle diameter for lubrication jets: 28.2 mm. Lubricant: grease or oil. Quantity and configuration: Unit Quantity: 1 Pc. Internal Clearance: N/A. The bearing is preload-set at manufacture rather than clearance-set, so no radial clearance class applies. Interchange guidance: Carton designations carried on this part: B7004X3TADUL EP7 and 3MM9104WI DUL. The RHP B-series X3 code, the Fafnir 3MM prefix and the E code all give the 25° angle, and EP7 is the same class as P4. Same-envelope 25° super-precision executions in other schemes: SKF 7004 ACDGA/P4A, NSK 7004A5TRSU and FAG B7004-E-T-P4S-UL. A 7004C in this envelope carries a 15° contact angle, which makes it a related size rather than a substitution.