RHP7201CTDULP4Super Precision Angular Contact Ball Bearing – Straight Bore, 12 mm ID, 32 mm OD, 10 mm Width, Open, 15° Contact Angle, Light Preload, ABEC 7 / P4, Matched Pair

Product Description

What this part is

RHP 7201CTDULP4 super-precision single-row angular contact ball bearing, supplied as a matched duplex pair. Bore: 12 mm. Outside Diameter: 32 mm. Width: 10 mm. Contact Angle: 15°. Precision Class: P4, equivalent to ABEC 7 and ISO Class 4. Dynamic Load Rating: 7.9 kN. Static Load Rating: 3.85 kN. Cage Material: Laminated phenolic resin. Cage Type: Outer ring guided. Bore Type: Straight. Closure Type: Open. Rolling Elements: Steel balls. Number Of Rows: 1. Series: 7200, ISO dimension series 02. Bearing Material: Through-hardened carbon chrome bearing steel to SAE52100.

Decoding the designation

7201 is the type and size: single-row angular contact, ISO dimension series 02, bore code 01 for a 12 mm bore. C sets the contact angle at 15°. T is the outer-ring-guided laminated phenolic resin cage. DU marks a universally ground paired unit and L sets light preload. P4 is the precision grade. Searchable variants of the number: 7201C, 7201-C-T-DUL-P4, 7201 CT DUL P4, B7201X2TADULEP7, 2MM201WI CR DUL.

What these specs mean in practice

Limiting Speed: 76,100 r/min on oil-air lubrication and 47,000 r/min on grease. The two figures are the published pair for a single bearing under light external load, and the gap between them is why the lubrication method is chosen before the bearing is. A laminated phenolic resin cage is what makes those speeds available: it is light, it runs quietly against the outer ring land, and it is rated to 120 °C. Preload: Light, 39 N axial. Axial Stiffness: 21 N/µm. Light preload is the most widely specified level and keeps the highest speed capability of the four grades. Internal Clearance: N/A, as preload and mounted clearance are set against one another. Lubricant: grease or oil. Item weight: 0.036 kg (0.08 lbs) each.

Mounting dimensions

Shaft abutment diameter d1: 17 mm minimum. Housing abutment diameter D1: 27 mm maximum. Outer ring abutment D2: 29.5 mm maximum. Chamfer r: 0.6 mm minimum. Chamfer r1: 0.3 mm minimum. Effective Load Centre a: 7.9 mm. Internal volume: 1.7 cm³, the figure grease quantity is calculated from. Bearing tolerances are to P4: bore deviation −4 µm, outside diameter deviation −5 µm, radial runout of the assembled inner ring 2.5 µm, radial runout of the assembled outer ring 5 µm.

Quantity and configuration

Unit Quantity: 2 Pcs, a matched duplex pair at light preload. Universal face control means the inner and outer rings are the same width and the faces are ground at manufacture to the specified preload, so the pair mounts back-to-back, face-to-face or in tandem at the same preload value without ground spacers. Mounted back-to-back at light preload the speed factor is 0.80 of the single-bearing figure. The high point of radial runout is marked with a burnished spot on the inner ring face and a V line on the outer ring diameter.

Interchange guidance

Cross-references: SKF 7201 CD/P4ADGA, Fafnir 2MM201WI CR DUL. Both name the 15° super-precision execution in their own maker’s scheme, so both are like-for-like on angle, envelope and precision. The 25° 7201A5 shares the same 12 x 32 x 10 mm envelope and is a related size rather than a substitution, since angle sets both the thrust capacity and the speed limit.