RHP7211CTDULP4Super Precision Angular Contact Ball Bearing – 55 mm Bore, 100 mm OD, 21 mm Width, 15° Contact Angle, ABEC 7 / P4, Light Preload Duplex Set

Product Description

What this part is:

RHP 7211-C-T-DUL-P4 super precision angular contact ball bearing, supplied as a universally ground duplex set. Unit Quantity: 2 Pcs. Series: 7200, ISO dimension series 02.

Decoding the designation:

72 — ISO dimension series 02, the medium section of the RHP super precision angular contact range.

11 — bore code, 55 mm.

C — 15° contact angle.

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

DU — duplex universal. Two single-row bearings ground as a matched set; the faces are controlled so the set reaches its tabulated preload in back-to-back, face-to-face or tandem, with no shims or ground spacers.

L — light preload class.

P4 — RHP tolerance class P4, equivalent to BS 292 EP7 and ABEC 7.

Specifications:

Bore Diameter: 55 mm. Outside Diameter: 100 mm. Overall Width: 21 mm per bearing. Total Width: 42 mm. Contact Angle: 15°. Precision Class: ABEC 7 / P4. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Cage Material: Phenolic. Cage Type: Machined, outer-ring guided. Preload: Light. Dynamic Load Rating: 53,000 N per bearing. Static Load Rating: 40,000 N per bearing. Limiting Speed: 14,200 rpm grease; 23,000 rpm oil. Item Weight: 0.603 kg (1.33 lb) per bearing.

The speeds are the RHP tabulated single-bearing figures, the oil value for an oil-air feed and the grease value for a premium synthetic high-speed grease. RHP speed factors for paired sets: back-to-back light-preload pair 0.80, set of three 0.65, set of four 0.60, face-to-face a further 50 percent reduction, spring-loaded tandem pair 0.95.

Dimensions and mounting:

Minimum inner ring abutment diameter: 64 mm. Maximum outer ring abutment diameter: 91 mm. Maximum outer ring seating diameter: 94 mm. Chamfer r min: 1.5 mm. Chamfer r1 min: 1.0 mm. Effective load centre a: 20.9 mm. Internal free volume: 27.8 cm3. Pitch circle diameter for lubrication jets: 72.0 mm. Mounting Arrangement: Universal duplex set.

Compatibility and replacement:

55 x 100 x 21 mm, 15° super precision executions: SKF 7211 CD/P4ADGA, FAG B7211-C-T-P4S-UL, NSK 7211CTRDULP4, NTN 7211UCG/GNP4, Timken Fafnir 2MM211WICRDUL, Koyo 7211C/GNP4, NACHI 7211CYDULP4, GMN S6211 C TA P4, SNFA E 7211 7CE1. The carton also carries the RHP B-series form 211HDL and the SKF-scheme form 7211CDP4ADGA.

Frequently asked questions:

What is the contact angle of the RHP 7211CTDULP4?

Contact angle is 15°, given by the C in the designation.

What are the load ratings per bearing?

Dynamic Load Rating is 53,000 N and Static Load Rating is 40,000 N.

What preload does the DUL set carry?

Light preload, reached when the universally ground set is clamped.