RHP7206ETDUMP4Super-Precision Angular Contact Ball Bearing – 30 mm ID, 62 mm OD, 16 mm Width, 25° Contact Angle, Medium Preload, ABEC 7, Machined Phenolic Cage

Product Description

What this part is:

RHP 7206ETDUMP4 matched duplex pair, 2 Pcs, of single-row super-precision angular contact ball bearings for high-speed spindle work. Bore: 30 mm. Outside diameter: 62 mm. Width: 16 mm per bearing, 32 mm for the pair. Contact angle: 25°. Open on both faces. Supplied in two factory-sealed RHP cartons each labelled 7206ETDUMP4. Carton markings as printed: RR, 5 D:T / d:T, 09P96, MADE IN ENGLAND.

Decoding the designation:

7206 — single-row angular contact ball bearing, ISO dimension series 02, bore code 06 = 30 mm bore.

E — 25° contact angle in the RHP scheme.

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

DU — duplex universal: a matched pair of universally faced bearings with the preload set at manufacture.

M — medium preload.

P4 — ABEC 7 precision class.

Specifications:

Bore Diameter: 30 mm. Outside Diameter: 62 mm. Overall Width: 16 mm per bearing. Total Width: 32 mm for the pair. Contact Angle: 25°. Precision Class: ABEC 7 / P4 (BS292 EP7, ISO 492 Class 4). Cage Material: Laminated phenolic resin. Cage Type: Machined, outer-ring guided. Bearing Material: Through-hardened chrome bearing steel. Bore Type: Straight. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Closure Type: Open. Series: 72, ISO dimension series 02.

Dynamic Load Rating Cr: 22.1 kN (22,100 N) per bearing. Static Load Rating C0r: 14.1 kN (14,100 N) per bearing. Limiting Speed: 21,400 rpm grease; 34,700 rpm oil-air. Preload: Medium (M), 440 N axial per pair. Axial Stiffness: 147 N/µm per pair. Lubricant: grease or oil. Item Weight: 0.194 kg (0.43 lb) per bearing. The pair is preload-set at manufacture. Unit Quantity: 2 Pcs, one matched duplex pair.

Dimensions and mounting:

Effective load centre a: 18.7 mm. Chamfer r min: 1.0 mm. Chamfer r1 min: 0.6 mm. Shaft abutment diameter d1 min: 36 mm. Housing abutment diameter D1 max: 56 mm. Second housing abutment diameter D2 max: 57 mm. Internal free volume: 8.8 cm³. Pitch circle diameter for lubrication jets: 42.4 mm. Arrangement: DU, universally faced, so the pair mounts back-to-back (DB), face-to-face (DF) or in tandem (DT) at the same catalogue preload, with no spacers or shims.

Compatibility and replacement:

The current NSK number is 7206A5TRDUMP4; NSK acquired the RHP group and RHP super-precision bearings are still made at the former Ransome & Marles works in Newark. Other 25° cross-references at 30 x 62 x 16 mm: FAG B7206-E-T-P4S-DUM, Fafnir 3MM206WI DUM and SKF 7206 ACD/P4A. Related builds on the same envelope: 7206ETDULP4 (light preload), 7206ETDUHP4 (heavy preload), 7206ETSUMP4 (single universally ground) and 7206CTDUMP4 (15° contact angle). Other written forms: 7206-E-T-DUM-P4, 7206 E T DUM P4, 7206ETDUM.

Frequently asked questions:

What contact angle and preload does the RHP 7206ETDUMP4 have?

25° contact angle (the E code) and medium preload (the M code), 440 N axial per pair.

What are the load ratings and speed limits of the RHP 7206ETDUMP4?

Per bearing: dynamic load rating Cr 22.1 kN and static load rating C0r 14.1 kN. Limiting speed 21,400 rpm on grease and 34,700 rpm on oil-air.

What is included in the RHP 7206ETDUMP4 listing?

2 Pcs: one complete matched duplex pair, supplied in two factory-sealed RHP cartons each labelled 7206ETDUMP4.