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RHP 7224ETDULP4 super precision angular contact ball bearing pair, 120 x 215 x 40 mm, 25° contact angle, P4 precision, light preload, machined phenolic cage.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7224ETDULP4 |
| Model | 7224-E-T-DUL-P4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 120 mm |
| OD | 215 mm |
| Width | 40 mm |
| Material | Chrome bearing steel |
|---|---|
| Series | 72 (ISO Dimension Series 02) |
| Preload | Light (2,280 N axial) |
| Base Number | 7224 |
| Common Misspellings | RHP 7224 E T DUI P4, 7224ETDULP-4, RHP 7Z24E, B7224-E-T-DUL, Ransome Hoffmann Pollard |
| Application Types | Machine tool spindles, boring mill spindles, grinding spindles, heavy precision rotary and indexing tables, large gearbox and screw drive positions |
| Bore Shaft Size | 120 mm (4.7244 in) |
| Mpn Variants | 7224ETDULP4, 7224-E-T-DUL-P4, 7224 E T DUL P4, 7224ETDUL, B7224E, B7224-E, B7224E.T.P4S.UL, 7224E, 7224ETP4DUL |
| Manufacturer Status | RHP super precision was absorbed into NSK; RHP numbers remain in active cross-reference use |
| Compatible With Replaces | Machine tool spindle and precision rotary positions specified for a 7224-envelope 25° super precision angular contact duplex pair at light preload |
| Precision Class | ABEC 7 / P4 |
| Cage Type | Machined, outer ring guided |
| Dynamic Load Rating | 189,000 N |
| Static Load Rating | 184,000 N |
| Rolling Elements | Balls |
| Max Temp | 120 °C |
| Item Weight | 5.426 kg (11.96 lb) per bearing |
| Cage Material | Laminated phenolic |
| Number Of Rows | 1 per bearing (2 rows total in the pair) |
| Bore Type | Straight |
| Snap Ring Included | No |
| Limiting Speed | 5,700 rpm grease; 8,800 rpm oil-air |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Mounting Arrangement | Universal - back-to-back, face-to-face or tandem |
| Part Number | 7224ETDULP4 |
| Total Width | 80 mm across the pair |
| Cross Reference 1 | NSK 7224A5TRDULP4 |
|---|---|
| Cross Reference 2 | FAG B7224-E-T-P4S-UL |
| Cross Reference 3 | SKF 7224 ACD/P4ADGA |
| Cross Reference 4 | Fafnir 3MM224WI-DUL (25°, 72 envelope) |
| Cross Reference 6 | Fafnir 3MM9124WICRDUL (related size, 7024 envelope 120 x 180 x 28 mm) |
| Cross Reference 7 | 7224-C-T-DUL-P4 and Fafnir 2MM224WI (related size, 15° version of this envelope) |
| Cross Reference 9 | 7224-E-T-SUL-P4 (single universally ground form of the same bearing) |
RHP 7224ETDULP4 super precision angular contact ball bearings, supplied as a factory matched duplex pair. Two pieces, Unit Quantity: 2 Pcs. Single row each, open, straight bore, universally faced. Series 72, ISO dimension series 02.
7224 — ISO 72 series size, 120 x 215 x 40 mm.
E — 25° contact angle.
T — machined laminated phenolic cage, outer ring guided.
DU — universal face control, duplex pair.
L — light preload.
P4 — precision class P4, equivalent to EP7, ABEC 7 and ISO Class 4.
Bore Diameter: 120 mm.
Outside Diameter: 215 mm.
Overall Width: 40 mm per bearing.
Total Width: 80 mm across the pair.
Contact Angle: 25°.
Dynamic Load Rating: 189,000 N per bearing.
Static Load Rating: 184,000 N per bearing.
Limiting Speed: 5,700 rpm grease; 8,800 rpm oil-air, for a single bearing. A light-preload pair runs at 0.80 of the single-bearing figure: 4,560 rpm grease; 7,040 rpm oil-air.
Precision Class: ABEC 7 / P4.
Preload: Light, axial preload 2,280 N.
Axial Stiffness: 409 N/µm at light preload.
Running Accuracy: inner ring radial runout 5 µm maximum; outer ring radial runout 10 µm maximum.
Cage Material: Laminated phenolic. Cage Type: Machined, outer ring guided.
Material: SAE 52100 through-hardened chrome bearing steel.
Maximum Operating Temperature: 120 °C.
Item Weight: 5.426 kg (11.96 lb) each, 10.852 kg (23.93 lb) for the pair.
Mounting Arrangement: universal face control, back-to-back, face-to-face or tandem, at the marked light preload without ground spacers. Inner ring abutment diameter d1: 132 mm minimum. Outer ring abutment diameters D1 and D2: 203 mm and 208 mm maximum. Fillet radii r and r1: 2.5 mm and 1.5 mm minimum. Effective load centre a: 59.1 mm. Lubrication jet pitch circle diameter: 156.3 mm. Internal free volume: 225.7 cm3 per bearing. Preloaded pair, no internal clearance value applies.
Cross-references: NSK 7224A5TRDULP4 (25°, outer-ring-guided phenolic cage); FAG B7224-E-T-P4S-UL; SKF 7224 ACD/P4ADGA; Fafnir 3MM224WI-DUL (25°, 72 envelope). Related sizes: Fafnir 3MM9124WICRDUL is the 7024 envelope at 120 x 180 x 28 mm; 7224-C-T-DUL-P4 and Fafnir 2MM224WI are the 15° versions of this envelope. Carton designations: 7224ETDULP4, 7224-E-T-DUL-P4, B-7224-E-T-DUL-P4, B7224E, 7224X4.
The contact angle is 25° (E design), at light preload.
Dynamic load rating 189,000 N and static load rating 184,000 N per bearing.
Two 120 x 215 x 40 mm bearings matched as a universally faced duplex pair, 80 mm across the pair.
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