RHP7903ETDULP4Angular Contact Ball Bearing – 17 mm ID, 30 mm OD, 7 mm Width, 25° Contact Angle, Light Preload, ABEC 7 / P4, Phenolic Cage, Open.

Product Description

What this part is:

RHP 7903ETDULP4 super-precision single-row angular contact ball bearing, ISO dimension series 19, one half of a factory duplex pair. Unit Quantity: 1 Pc.

Decoding the designation:

7 — single-row angular contact ball bearing.

9 — RHP dimension series 9, ISO series 19, the thinnest section in the range.

03 — bore code 03, 17 mm bore.

E — 25° contact angle. The legacy RHP code for the angle NSK now designates A5.

T — laminated phenolic resin cage, outer-ring guided.

DU — paired unit, universally faced for back-to-back, face-to-face or tandem mounting.

L — light preload. As a back-to-back pair this gives an axial preload of 39 N and an axial stiffness of 46 N/µm.

P4 — ISO Class 4, ABEC 7, British Standard EP7.

1/2PR — one half of the factory pair. Unit Quantity: 1 Pc.

71903-E — the same bearing under the ISO five-digit form of the 19 series.

Specifications:

Bore Diameter: 17 mm. Outside Diameter: 30 mm. Overall Width: 7 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Preload: Light. Cage Material: Phenolic. Cage Type: Machined, outer-ring guided. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Bearing Material: Carbon chrome bearing steel, through hardened. Dynamic Load Rating: 4,750 N. Static Load Rating: 2,800 N. Limiting Speed: 36,800 rpm grease; 59,300 rpm oil. Speed factor for a back-to-back pair at light preload: 0.80 of the tabulated speeds. Lubricant: grease or oil. Maximum operating temperature of the laminated phenolic cage: 120°C. Item Weight: 0.016 kg (0.035 lb).

Dimensions and mounting:

Inner ring abutment diameter d1 min: 19.5 mm. Outer ring abutment diameter D1 max: 27.5 mm. Outer ring seating diameter D2 max: 28.8 mm. Chamfer dimension r min: 0.3 mm. Chamfer dimension r1 min: 0.15 mm. Effective load centre a: 9.0 mm. Internal free volume: 0.9 cm³. PCD of lubrication jets: 21.8 mm. Mounting Arrangement: Universally faced, one half of a duplex pair; pairs with any other 7903-E-T-DUL at the designed light preload. The deviation from nominal bore and outside diameter in microns is marked on the face of each ring.

Compatibility and replacement:

Same 17 x 30 x 7 mm envelope, same 25° angle, same light preload at super-precision class: SKF 71903 ACD/P4ADGA, FAG B71903-E-T-P4S-UL, NSK 7903A5TRDULP4, Timken Fafnir 3MM9303WI CR DUL, IBC 71903-E-T-P4S-UL, GMN S6903-E-TA-P4.

Frequently asked questions:

What are the dimensions of the RHP 7903ETDULP4?

Bore Diameter: 17 mm. Outside Diameter: 30 mm. Overall Width: 7 mm.

What contact angle and precision class does it have?

Contact Angle: 25°. Precision Class: ABEC 7 / P4.

What are its load ratings and limiting speed?

Dynamic Load Rating: 4,750 N. Static Load Rating: 2,800 N. Limiting Speed: 36,800 rpm grease; 59,300 rpm oil.