RHP7202CTDULP4Super Precision Angular Contact Ball Bearing Matched Pair 15x35x11 mm 15° ABEC 7 Light Preload

Product Description

What this part is

A duplex-ground matched pair of RHP 7202C single-row super-precision angular contact ball bearings. Bore: 15 mm. Outside Diameter: 35 mm. Overall Width: 11 mm per bearing. Total Width: 22 mm for the clamped pair. Contact Angle: 15°. Precision Class: P4, ISO Class 4, ABEC 7, RHP class code EP7. Precision Rating: ABEC 7. Cage Material: laminated phenolic resin. Cage Type: machined, outer ring guided. Closure Type: open on both faces. Bore Type: straight. Rolling Elements: carbon chrome bearing steel balls. Bearing Material: carbon chrome bearing steel to BS970 534A99/535A99 or SAE 52100. Series: RHP 72, ISO dimension series 02. Number Of Rows: 1 per bearing. Design Units: metric. Snap ring included: No.

Decoding the designation

Type 7: single-row angular contact ball bearing. Dimension series 2: ISO series 02. Bore code 02: 15 mm bore. Contact angle C: 15°. Cage T: machined laminated phenolic resin, outer ring guided. Grouping DU: matched duplex pair, universal face control. Preload L: light. Precision grade P4: ISO Class 4, ABEC 7, RHP class code EP7. The carton cross-reference 7202X2TADUEP7 carries the same bearing in the RHP B-series form, with X2 for the 15° angle and EP7 for the ABEC 7 class.

Load ratings and speed

Dynamic Load Rating: 8.65 kN, 8,650 N, per single bearing. Static Load Rating: 4.55 kN, 4,550 N, per single bearing. Limiting Speed: 67,200 rpm oil/air; 41,600 rpm grease, per single bearing with the inner ring rotating. Derated Limiting Speed, mounted as a back-to-back pair at light preload: 53,760 rpm oil/air; 33,280 rpm grease. Lubricant: oil/air or grease. Maximum Operating Temperature: 120 °C.

What these specs mean in practice

Contact Angle: 15°, the speed-biased angle of the two the range publishes. A 15° pair reaches a higher limiting speed than a 25° pair of the same envelope and carries less axial load and less axial stiffness.

Axial Preload, light grade, as a paired set: 39 N. Axial Stiffness, light grade, as a paired set: 23 N per micrometre. Preload removes internal play, fixes the contact angle and makes axial position and runout repeatable. The L grade adds the least friction heat of the four grades. The bearing is preload-set at manufacture rather than clearance-set.

P4 holds bore, outside diameter, width and running accuracy to single-digit micron limits; on a 15 mm bore the mean bore deviation limit is 4 µm. Radial runout of the assembled inner ring, Kia: 2.5 µm. Radial runout of the assembled outer ring, Kea: 5 µm. Reference face runout with bore, Sd: 2.5 µm. Outer diameter runout with reference face, SD: 4 µm. Duplex grinding converts those tolerances into the preload itself: the ring faces are relieved by a measured amount, so clamping the pair solid produces the light preload directly. The laminated phenolic resin cage riding on the outer ring land keeps cage inertia and ball-pocket loads low and holds an oil film well.

Quantity and configuration

Unit Quantity: 2 Pcs, supplied as one matched duplex pair, duplex ground as a set. Arrangement / Configuration: matched duplex pair (DU), universal face control. Universal face control means the inner and outer rings are the same width and the face relief on both sides is set so the pair mounts back-to-back or face-to-face at the same preload, and shares load equally in tandem. Each bearing on its own takes thrust in one direction; back-to-back or face-to-face the pair takes thrust in both directions, and in tandem it takes a larger load in one direction only.

Mounting data

Inner ring abutment diameter, d1 min: 20 mm. Outer ring abutment diameters: D1 max 30 mm, D2 max 32.5 mm. Chamfer dimensions: r min 0.6 mm, r1 min 0.3 mm. Effective Load Centre (a): 8.8 mm. Internal free volume: 2.2 cm³. PCD of lubrication jets: 22.6 mm. Item weight: 0.045 kg (0.099 lb) per bearing.

Interchange guidance

7202X2TADUEP7 is the RHP B-series form of this envelope and angle, SKF 7202 CD/P4A with the DGB suffix is the matching 15° light-preload set (DGA is SKF extra light), 2MM202WI is the Fafnir designation and FAG B7202-C-T-P4S-DUL is the FAG designation. NSK 7202CTRDULP4 is the current NSK-RHP catalogue designation. Same-envelope bearings differing in contact angle, preload grade or tolerance class — 7202A5 at 25°, the medium and heavy preload sets, and P3 or P2 class variants — are related sizes rather than interchanges. A single universally faced 7202CTRSU is a separate item with its own face grinding.