RHP7004CTDULP4Super Precision Angular Contact Ball Bearing Pair – 20 mm ID, 42 mm OD, 12 mm Width, 15° Contact Angle, ABEC 7, Light Preload

Product Description

What this part is:

RHP 7004CTDULP4 is a duplex-ground matched pair of single-row super-precision angular contact ball bearings, supplied as 2 Pcs. Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing. Total Width: 24 mm for the pair. Contact Angle: 15°. Precision Class: P4 (ISO Class 4, ABEC 7, RHP class code EP7). Preload: Light (L). Unit Quantity: 2 Pcs.

Decoding the designation:

7 — single-row angular contact ball bearing.

00 — ISO dimension series 10; bore code 04 gives the 20 mm bore.

C — 15° contact angle.

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

DU — matched duplex pair, universal face control.

L — light preload.

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

B7004X2TADULEP7 — the RHP B-series form of this designation, in which X2 is 15° and EP7 is ABEC 7.

2MM9104WI — the Fafnir-scheme number for the same size, whose 2MM prefix is 15°.

Specifications:

Bearing Type: Single-row super-precision angular contact ball bearing, duplex matched pair. Series: RHP 70, ISO dimension series 10. Base Number: 7004. Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing. Total Width: 24 mm for the pair. Contact Angle: 15°. Precision Class: P4 (ISO Class 4, ABEC 7, RHP EP7). Cage Material: Laminated phenolic resin. Cage Type: Machined, outer ring guided. Closure Type: Open. Bore Type: Straight. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Bearing Material: Carbon chrome bearing steel. Preload: Light (L). Axial Preload: 49 N as a paired set. Axial Stiffness: 28 N per micrometre as a paired set. Dynamic Load Rating (Cr): 11,100 N per bearing. Static Load Rating (C0r): 6,550 N per bearing. Limiting Speed: 53,600 rpm oil/air; 33,100 rpm grease, single bearing under spring preload, inner ring rotating. Derated Limiting Speed: 42,880 rpm oil/air; 26,480 rpm grease, back-to-back pair at light preload. Lubricant: oil/air or grease. Maximum Operating Temperature: 120 °C. Radial Runout, Kia (inner ring): 2.5 µm. Radial Runout, Kea (outer ring): 5 µm. Item Weight: 0.069 kg (0.152 lb) per bearing.

Dimensions and mounting:

Envelope: 20 x 42 x 12 mm per bearing. Inner ring abutment diameter, d1 min: 25 mm. Outer ring abutment diameters: D1 max 37 mm, D2 max 39.5 mm. Fillet radii: r min 0.6 mm, r1 min 0.3 mm. Effective Load Centre (a): 10.1 mm. Internal free volume: 3.1 cm³. PCD of lubrication jets: 28.2 mm. Universal face control allows back-to-back, face-to-face or tandem mounting at the light preload.

Compatibility and replacement:

Crosses: RHP B7004X2TADULEP7, Fafnir 2MM9104WI, NSK 7004CTRDULP4 (current NSK-RHP catalogue designation) and FAG B7004-C-T-P4S-DUL (FAG P4S class). Also written 7004-C-T-DUL-P4, 7004 C T DUL P4, 7004CTDUL and 7004C.

Frequently asked questions:

What size is the RHP 7004CTDULP4?

20 mm bore, 42 mm outside diameter and 12 mm width per bearing; 24 mm total width for the pair.

What are the load ratings and limiting speeds?

Dynamic Load Rating 11,100 N and Static Load Rating 6,550 N per bearing. Limiting Speed 53,600 rpm oil/air and 33,100 rpm grease for a single bearing; 42,880 rpm oil/air and 26,480 rpm grease as a back-to-back pair at light preload.

What do C, T, DUL and P4 mean?

C is a 15° contact angle; T is a machined laminated phenolic cage; DUL is a matched duplex pair with universal face control and light preload; P4 is ISO Class 4, equivalent to ABEC 7.