RHP7009CTDULP4Angular Contact Ball Bearing – 45 mm ID, 75 mm OD, 16 mm Width, Open, 15°, Light Preload

Product Description

What this part is

RHP 7009CTDULP4-1/2PR super-precision single-row angular contact ball bearing. Bore: 45 mm. Outside Diameter: 75 mm. Width: 16 mm. Contact Angle: 15°. Precision Class: P4, equal to ABEC 7 and ISO Class 4. Series: 7000, ISO dimension series 10. Cage: laminated phenolic resin, outer-ring guided. Closure: Open. Preload: Light. Rolling Elements: Ball. Number of Rows: 1. Bore Type: Straight. Mounting Arrangement: Universal. Country of Origin: United Kingdom. Universally ground, so two pieces clamped together form a defined-preload duplex pair.

Decoding the designation

70: ISO dimension series 10. 09: bore reference, 45 mm. C: 15° contact angle. T: laminated phenolic resin cage, outer-ring guided. DU: duplex, universally ground. L: light preload. P4: precision class P4, ABEC 7, ISO Class 4. -1/2PR: half of a pair. Searchable forms of the designation: 7009CTDULP4, 7009-C-T-DUL-P4, 7009 C T DUL P4, B7009X2TADULEP7, 2MM9109WI-CR-DUL.

Published ratings

Basic Dynamic Load Rating (Cr): 23.5 kN / 5283 lbf. Basic Static Load Rating (C0r): 18.5 kN / 4159 lbf. Limiting Speed: 18,000 rpm. Maximum Operating Temperature: 120 °C. Minimum Operating Temperature: -30 °C. Material: through-hardened high carbon chrome bearing steel to BS970 534A99 / 535A99, equivalent to SAE 52100. Lubricant: Oil. Item Weight: 0.54 lbs. Harmonization Code: 8482.10.50.

What universal grinding buys

Universally faced rings are ground at manufacture so that a predetermined force exists between two bearings once they are clamped together. Back-to-back and face-to-face mounting both hold the same preload value, and tandem mounting shares load equally between pieces. Target preload is reached without face-step measurement or custom spacer grinding.

What these specs mean in practice

A 15° contact angle favours speed and low running heat. A 25° angle favours axial stiffness. Light preload is the most frequently selected level, suited to moderate load and speed duty; heavier preloads add rigidity, reduce speed capability and generate more heat.

Speed derating against a single bearing’s limiting speed, light preload: back-to-back pair 0.80, set of three 0.65, set of four 0.60. Medium preload pair: 0.60. Heavy preload pair: 0.40. Face-to-face mounting reduces those factors by a further 50 percent. Preload level and arrangement set the speed ceiling alongside bearing size.

The outer-ring-guided laminated phenolic cage runs quietly, generates little heat and holds oil. Its temperature ceiling is 120 °C.

Quantity and configuration

Unit Quantity: 1 Pc. One bearing per unit, half of a duplex pair. The DUL designation describes how two of these bearings behave once mounted together, and the -1/2PR carton marking identifies the single-piece sale unit.

Fitting notes

Each bearing is marked at its high point of radial runout: a small circle or burnished spot on the inner ring face, plus a V line on the outer ring outside diameter. Aligning those marks with each other and opposing them to shaft and housing eccentricity minimises assembled runout. The V also points in the direction of the contact angle, giving the thrust direction. RHP marks the deviation from nominal bore and outside diameter in microns on each ring face, with the grade repeated on the box end; a matched pair is built from like grades.

Interchange guidance

RHP is part of the NSK Group, so current equivalents carry NSK numbering. Cross-references: SKF 7009 CDDGA/P4A and FAG B7009-C-T-P4S-UL. Carton designations retained: B7009X2TADULEP7, in which EP7 is the British Standard BS292 grade equal to ABEC 7 and to P4; and 2MM9109WI-CR-DUL, the Fafnir/Timken world part number for the same envelope, in which 2MM denotes a 15° contact angle and CR a phenolic outer-land-riding cage. Fafnir stock sells under Timken. Contact-angle suffix schemes differ between brands.