RHP7007ETSULP4Super Precision Angular Contact Ball Bearing – 35 mm ID, 62 mm OD, 14 mm Width, 25° Contact Angle, P4 / EP7, Light Preload, Open

Product Description

What this part is

RHP 7007ETSULP4 super precision angular contact ball bearing. Bore: 35 mm. Outside diameter: 62 mm. Width: 14 mm. Series: 70, ISO dimension series 10. Single row, open, straight bore, universally faced. Manufactured in the United Kingdom.

Decoding the designation

Contact Angle: 25°. Cage: machined laminated phenolic resin, outer ring guided. Grouping: SU, single universal. Preload: Light. Precision Grade: P4, equivalent to EP7, ABEC 7 and ISO Class 4.

What these specs mean in practice

Dynamic Load Rating: 18.2 kN. Static Load Rating: 13.0 kN. Limiting speed: 33,100 rpm on oil/air lubrication and 20,500 rpm on grease. A 25° contact angle carries more thrust and gives a stiffer axial response than a 15°, and runs cooler and faster than a 30° or 40°. The 70 series is the slim spindle section, which keeps outside diameter and mass down for a given shaft and lifts the speed ceiling. P4 holds tighter running accuracy, which lowers runout and vibration: inner ring radial runout 4 µm maximum, outer ring radial runout 5 µm maximum.

Preload and stiffness

Axial preload for a light-preload pair of this size and angle: 150 N. Axial stiffness at light preload: 107 N/µm. Light preload gives the lowest internal friction and heat generation of the four preload classes and the highest permissible speed. Preload is set at manufacture, so no internal clearance value applies.

Quantity and configuration

One bearing, single universally faced. Universal face control means the inner and outer rings are the same width and the face steps are pre-adjusted, so two or more bearings of this designation build a back-to-back, face-to-face or tandem set at the marked light preload without shims or ground spacers. The carton also carries the DUL marking, retained as a search term.

Fitting notes

Inner ring abutment diameter d1: 41 mm minimum. Outer ring abutment diameters D1 and D2: 56 mm and 57 mm maximum. Fillet radii r and r1: 1.0 mm and 0.6 mm minimum. Effective load centre a: 18.3 mm. Lubrication jet pitch circle diameter: 44.6 mm. Internal free volume: 7.0 cm3. Recommended shaft fit for P4 at this diameter is a mean interference of 3 µm, and the locating housing fit a mean clearance of 5 µm. Grease fill is 30 per cent of internal volume at low and medium speed, 10 to 15 per cent above 80 per cent of maximum speed. Maximum recommended operating temperature: 120 °C. Rings and balls: SAE 52100 through-hardened chrome bearing steel. Mass: 0.150 kg (0.33 lb).

Interchange guidance

Carton designations: 7007ETSULP4, 7007-E-T-SUL-P4, B-7007-X3-TA-UL-EP7, 2MM9107WICRSUL. NSK 7007A5TRSULP4 is the current-scheme equivalent at 25° with the same outer-ring-guided phenolic cage. FAG B7007-E-T-P4S-UL and SKF 7007 ACD/P4A are 25° equivalents. Fafnir 3MM9107WI is the 25° Fafnir equivalent in this envelope. Related size: Fafnir 2MM9107WI-CR shares the 35 x 62 x 14 mm envelope at 15°.