RHP7218ETDUMP4-1/2PRSuper Precision Angular Contact Ball Bearing – Straight Bore, 90 mm ID, 160 mm OD, 30 mm Width, Open, 25° Contact Angle, Universal Medium Preload, ABEC 7

Product Description

What this part is:

RHP 7218ETDUMP4-1/2PR is a super precision single-row angular contact ball bearing, 90 x 160 x 30 mm, supplied as one bearing (half of a universally ground medium-preload pair). Unit Quantity: 1 Pc. Series: 72 (ISO dimension series 02). Base Number: 7218. Number Of Rows: 1. Rolling Elements: Balls. Bore Type: Straight. Closure Type: Open. Harmonization Code: 8482.10.50.28.

Decoding the designation:

7 — single-row angular contact ball bearing.

2 — dimension series 02.

18 — bore code, 90 mm bore.

E — legacy RHP code for 25° contact angle (current code A5).

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

DU — universally ground for paired mounting.

M — medium preload.

P4 — ISO class 4, equal to BS292 EP7 and ABEC 7.

-1/2PR — one bearing, half of a matched pair.

Specifications:

Bore Diameter: 90 mm. Outside Diameter: 160 mm. Overall Width: 30 mm. Contact Angle: 25°. Precision Class: P4 (ABEC 7). Preload: Medium (M). Dynamic Load Rating: 117,000 N. Static Load Rating: 100,000 N. Limiting Speed: 11,800 rpm oil/air; 7,500 rpm grease. Cage Type: Machined, outer-ring guided. Cage Material: Laminated phenolic resin. Maximum Operating Temperature: 120°C. Item Weight: 2.206 kg (4.86 lb). Bearing Material: SAE 52100 chrome bearing steel, through hardened.

Dimensions and mounting:

Mounting Arrangement: universally ground (DU), pairs back-to-back, face-to-face or tandem at the medium preload value. Fillet radius r: 2.5 mm. Fillet radius r1: 1.0 mm. Abutment diameter d1 min: 100 mm. Abutment diameter D1 max: 150 mm. Abutment diameter D2 max: 154 mm. Effective Load Centre: 44.1 mm. Axial Preload, medium grade, paired: 2,940 N. Axial Stiffness, medium grade, paired: 416 N per micrometre. Inner-ring radial runout: 5 micrometres max. Outer-ring radial runout: 7.5 micrometres max. Internal Volume: 95.1 cm3. Lubrication jet pitch circle diameter: 116.7 mm.

Compatibility and replacement:

Cross-references at 25° contact angle, P4 class and medium preload: NSK 7218A5TRSUMP4; Fafnir 3MM218WI CR DUM; RHP B7218X3TADUMEP7; SKF 7218 ACDGB/P4. Source for ratings and dimensions: RHP Super Precision Angular Contact Ball Bearings catalogue C859/B/E/I/03.02, Table 10, row 7218A5TRSU.

Frequently asked questions:

What are the dimensions of the RHP 7218ETDUMP4-1/2PR?

Bore 90 mm, outside diameter 160 mm, width 30 mm, ISO dimension series 02.

What does -1/2PR mean on this bearing?

It is one bearing, half of a matched pair; Unit Quantity is 1 Pc.

What are the contact angle and load ratings?

Contact angle 25° (E in the RHP designation). Dynamic load rating 117,000 N and static load rating 100,000 N.