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Super precision angular contact ball bearing, 110 x 200 x 38 mm, 25° contact angle, light preload, laminated phenolic cage, P4 tolerance, heavy 72 section.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7222ETDULP4 |
| Model | B7222-E-T-P4S-UL / 3MM222WI / 7222ACD / B7222 X3 TA UL EP7 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 110 mm (4.3307 in) |
| OD | 200 mm (7.8740 in) |
| Width | 38 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Condition | New |
| Lubricant | Oil Preservative |
| Preload | Light |
| Running Accuracy | P4 |
| Base Number | 7222 |
| Industry Terms | Machine tool spindle bearing; super precision angular contact; half pair; ABEC 7 spindle bearing |
| Bore Shaft Size | 110 mm (4.3307 in) |
| Mpn Variants | 7222ETDULP4-1/2PR; 7222ETDULP4; 7222-E-T-DUL-P4; 7222E; 7222ACD; B7222X3TAULEP7; 3MM222WI; B7222-E-T-P4S-UL |
| Arrangement Configuration | DU — universally ground, one bearing of a light-preload pair |
| Precision Class | P4 (ABEC 7, RHP EP7, ISO Class 4) |
| Additional Attributes | Axial stiffness, paired at light preload: 368 N/µm. Effective load centre a: 55.1 mm. Abutment: d1 122 mm max, D1 188 mm min, D2 193 mm max. Corner radius r 2.5 mm min, r1 1.5 mm min. Internal free volume 192.5 cm³. |
| Min Temp | -30 °C |
| Cage Type | Machined, outer ring guided |
| Dynamic Load Rating | 168,000 N (37,770 lbf) |
| Static Load Rating | 153,000 N (34,400 lbf) |
| Precision Rating | P4 / ABEC 7 / EP7 / ISO Class 4 |
| Rolling Elements | Steel balls |
| Max Temp | 120 °C |
| Item Weight | 9.82 lb (4.453 kg) |
| Cage Material | Laminated phenolic resin |
| Limiting Speed | 9,500 rpm oil/air; 6,200 rpm grease |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Internal Clearance | N/A — preloaded |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Mounting Arrangement | Universal face control |
| Design Units | Metric |
| Bearing Material | Through-hardened carbon chrome bearing steel (SAE 52100) |
| Part Number | 7222ETDULP4-1/2PR |
| Running Accuracy Radial And Axial Runout | P4: inner ring radial runout 5 µm max, outer ring radial runout 10 µm max |
| Cross Reference 1 | SKF 7222 ACDGA/P4A |
|---|---|
| Cross Reference 2 | FAG B7222-E-T-P4S-UL |
| Cross Reference 3 | Fafnir 3MM222WI |
| Cross Reference 4 | 7222CTRSUL (related size, 15° contact angle) |
| Cross Reference 5 | 7022A5TRDUL (related size, lighter 70 section on the same bore) |
RHP 7222ETDULP4 super precision angular contact ball bearing, half of a light-preload duplex pair. Series: 72, ISO dimension series 02. Bore: 110 mm. Outside Diameter: 200 mm. Width: 38 mm. Country of origin: United Kingdom. Searchable forms: 7222ETDULP4-1/2PR, 7222-E-T-DUL-P4, 7222E, 7222ACD, and the carton cross-references B7222X3TAULEP7 and 3MM222WI.
Contact Angle: 25°. Cage: laminated phenolic resin, outer ring guided. Grouping: DU, universally ground for pairing. Preload: Light, 1,960 N axial when paired. Precision Grade: P4 — ABEC 7, RHP EP7, ISO Class 4. The suffix -1/2PR marks one bearing out of a pair.
Dynamic Load Rating: 168,000 N. Static Load Rating: 153,000 N. Limiting speed: 9,500 rpm on oil/air, 6,200 rpm on grease. The 72 section is the heaviest of the three super precision series, so a 7222 carries markedly higher load than a 7022 on the same 110 mm bore. A 25° contact angle carries more thrust and less speed than a 15°. Light preload gives a paired axial stiffness of 368 N/µm. The laminated phenolic cage runs quietly at speed and is rated to 120 °C.
One bearing, universally faced. It pairs with any other 7222 of the same angle and preload class at the light preload value, in back-to-back, face-to-face or tandem order.
Effective load centre: 55.1 mm. Abutment dimensions: shaft shoulder 122 mm maximum, housing shoulder 188 mm minimum, outer ring abutment 193 mm maximum. Corner radii: 2.5 mm minimum outer, 1.5 mm minimum inner. Recommended shaft fit at P4 for a 110 mm seat is a mean 3 µm interference; a locating housing bore takes a mean 7 µm clearance. Internal free volume is 192.5 cm³, which sets the grease charge at 20 to 30 per cent fill. The high point of radial runout is marked by a burnished spot on the inner ring face and a V line on the outer ring diameter.
Same-spec equivalents: SKF 7222 ACDGA/P4A, FAG B7222-E-T-P4S-UL, Fafnir 3MM222WI. Related size: 7222CTRSUL, the 15° version of the same envelope, and 7022A5TRDUL, the lighter 70 section on the same bore.
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