RHP7009CTDULP4-1/2PRAngular 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: 70, ISO dimension series 10. Cage Material: laminated phenolic resin. Cage Type: machined, outer-ring guided. Closure Type: Open. Preload: Light. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Face Control: Universal. Country of Origin: United Kingdom.

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 faced. L: light preload. P4: precision class P4, ABEC 7, ISO Class 4. -1/2PR: one piece. Searchable forms of the designation: 7009CTDULP4, 7009-C-T-DUL-P4, 7009 C T DUL P4, B7009X2TADULEP7, 2MM9109WI-CR-DUL.

Published ratings and speeds

Basic Dynamic Load Rating (Cr): 24.4 kN (24 400 N / 5485 lbf) per bearing. Basic Static Load Rating (C0r): 19.3 kN (19 300 N / 4339 lbf) per bearing. Limiting Speed, oil/oil-air lubrication: 30 500 rev/min. Limiting Speed, grease lubrication: 18 800 rev/min. Axial Preload: 150 N, light, as a paired set. Axial Stiffness: 58 N/µm for a light-preload pair. Effective Load Centre (a): 16.0 mm. Bearing Material: through-hardened high carbon chrome bearing steel to BS970 534A99 / 535A99, equivalent to SAE 52100. Lubricant: oil or grease. Harmonization Code: 8482.10.50.

What universal face control buys

Universally faced rings are ground so the inner and outer rings are the same width and the face positions are set at manufacture to give a predetermined force once two bearings are clamped together. Back-to-back and face-to-face mounting 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 and thrust capacity. Light preload is the most frequently selected level and suits moderate load and speed duty; heavier preloads add rigidity, reduce speed capability and generate more heat.

Speed factors applied to 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 applies a further 50 percent reduction. A spring-loaded tandem pair takes a factor of 0.95. Preload level and arrangement set the speed ceiling alongside bearing size.

The outer-ring guided laminated phenolic cage is light and self-lubricating, so it runs quietly and generates little heat at spindle speeds. The catalogue gives a maximum recommended operating temperature of 120 °C for laminated phenolic resin caged bearings.

Quantity and configuration

Unit Quantity: 1 Pc. One bearing, 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.

Mounting data

Shaft Abutment Diameter (d1 min): 51 mm. Housing Abutment Diameters: D1 max 69 mm, D2 max 70 mm. Bearing Fillet Radius (r min): 1.0 mm. Secondary Fillet Radius (r1 min): 0.6 mm. Lubrication Jet Pitch Circle Diameter (dT, DIN 628-6): 55.6 mm. Internal Free Volume: 11.2 cm³. Mass: 0.238 kg (0.52 lb). Recommended shaft fit at P4: +2 / -2 µm, a mean 2T interference. Recommended housing fit at P4 for a locating bearing: +5 / 0 µm, a mean 5C clearance.

Interchange guidance

RHP is part of the NSK Group and current equivalents carry NSK numbering; the NSK form of this designation is 7009CTRDULP4. Cross-references: SKF 7009 CDDGA/P4A and FAG B7009-C-T-P4S-UL. Carton designations: B7009X2TADULEP7, in which X2 is the 15° contact angle and EP7 the British Standard BS292 grade equal to ABEC 7 and P4; and 2MM9109WI-CR-DUL, the Fafnir world part number for the same envelope, in which 2MM denotes 15° and CR a phenolic outer-land-riding cage. Fafnir stock sells under Timken.