RHP7204CTDULP4Super-Precision Angular Contact Ball Bearing — 20 mm ID, 47 mm OD, 14 mm Width, 15° Contact Angle, ABEC 7, Light Preload

Product Description

What this part is:

RHP 7204CTDULP4 is a matched duplex pair of single-row super-precision angular contact ball bearings, 20 x 47 x 14 mm each and 28 mm across the clamped pair, with a 15° contact angle, light preload and P4 (ABEC 7) precision. The set is two pieces, duplex ground together with universal face control.

Decoding the designation:

7 — single-row angular contact ball bearing.

2 — ISO dimension series 02.

04 — bore code, 04 × 5 = 20 mm.

C — 15° contact angle.

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

DU — matched duplex pair, universal face control: the pair mounts back-to-back, face-to-face or in tandem.

L — light preload.

P4 — ISO Class 4, ABEC 7, RHP class code EP7.

B7204X2TADULEP7 — the RHP B-series form of this designation; X2 is the 15° contact angle and EP7 is the ABEC 7 class.

Specifications:

Bore Diameter: 20 mm. Outside Diameter: 47 mm. Overall Width: 14 mm per bearing. Total Width: 28 mm for the clamped pair. Contact Angle: 15°. Precision Class: P4, ISO Class 4, ABEC 7, RHP class code EP7. Cage Material: laminated phenolic resin. Cage Type: machined, outer ring guided. Closure Type: Open. Bore Type: Straight. Rolling Elements: Steel balls. Bearing Material: carbon chrome bearing steel (SAE 52100). Series: RHP 72, ISO dimension series 02. Number Of Rows: 1 per bearing. Dynamic Load Rating: 14.6 kN (14,600 N) per bearing. Static Load Rating: 8.05 kN (8,050 N) per bearing. Limiting Speed: 50,700 rpm oil/air; 31,300 rpm grease, single bearing under spring preload with the inner ring rotating. Derated Limiting Speed: 40,500 rpm oil/air; 25,000 rpm grease as a back-to-back pair at light preload. Lubricant: oil/air or grease. Maximum Operating Temperature: 120 °C. Preload: Light (L), 69 N as a paired set. Axial Stiffness: 30 N per micrometre at light preload, paired set. Running Accuracy: Kia 2.5 µm, Kea 5 µm, Sd 4 µm, SD 4 µm. Item Weight: 0.104 kg (0.229 lb) per bearing. Unit Quantity: 2 Pcs.

Dimensions and mounting:

Inner ring abutment diameter, d1 min: 26 mm. Outer ring abutment diameters: D1 max 41 mm, D2 max 42 mm. Chamfer dimensions: r min 1.0 mm, r1 min 0.6 mm. Effective Load Centre (a): 11.5 mm. Internal free volume: 4.7 cm³. PCD of lubrication jets: 30.5 mm. Arrangement / Configuration: matched duplex pair (DU), universal face control.

Compatibility and replacement:

Cross-references: RHP B7204X2TADULEP7, Fafnir 2MM204WI CR DUL and NSK 7204CTRDULP4. Also written 7204-C-T-DUL-P4, 7204 C T DUL P4, 7204CTDUL and 7204C.

Frequently asked questions:

What are the size and contact angle of the RHP 7204CTDULP4?

Bore Diameter: 20 mm. Outside Diameter: 47 mm. Overall Width: 14 mm per bearing, 28 mm for the clamped pair. Contact Angle: 15°.

What do DU, L and P4 mean?

DU is a matched duplex pair with universal face control, L is light preload (69 N as a paired set) and P4 is ISO Class 4, equivalent to ABEC 7 (RHP class code EP7).

What are the load ratings and limiting speeds?

Dynamic Load Rating: 14.6 kN per bearing. Static Load Rating: 8.05 kN per bearing. Limiting Speed: 50,700 rpm oil/air; 31,300 rpm grease for a single bearing; 40,500 rpm oil/air and 25,000 rpm grease as a back-to-back pair at light preload.