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Matched duplex pair of angular contact ball bearings, 90 x 160 x 30 mm, 25° contact angle, light preload, laminated phenolic cage, open.
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$705.89
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| MFR / Brand | RHP |
|---|---|
| MPN | 7218ETDULP4 |
| Model | 7218 E T DUL P4 / 3MM218WI CR DUL / 7218A5 7218AC |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 90 mm |
| OD | 160 mm |
| Width | 30 mm |
| Material | Chrome Steel |
|---|---|
| Series | 7200 |
| Condition | New |
| Lubricant | Oil Preservative |
| Preload | Light |
| Base Number | 7218 |
| Total Width | 60 mm assembled pair |
| Bore Shaft Size | 90 mm |
| Mpn Variants | 7218ETDULP4, 7218-E-T-DUL-P4, 7218 E T DUL P4, 7218X3TDUEP7, 7218A5, 3MM218WICR-DUL |
| Arrangement Configuration | DU — matched duplex pair |
| Precision Class | P4 |
| Additional Attributes | Axial stiffness 304 N/µm as a light-preload pair. Effective load centre a = 44.1 mm. Abutment: d1 min 100 mm, D1 max 150 mm, D2 max 154 mm. Fillet radii r min 2.5 mm, r1 min 1.0 mm. Internal volume 95.1 cm³ per bearing. Lubrication jet PCD 116.7 mm. |
| Min Temp | -30°C |
| Cage Type | Machined, outer ring guided |
| Dynamic Load Rating | 117 kN / 26,300 lbf (Cr) per bearing |
| Static Load Rating | 100 kN / 22,480 lbf (C0r) per bearing |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120°C |
| Item Weight | 9.73 lbs / 4.412 kg for the pair |
| Cage Material | Laminated phenolic resin |
| Limiting Speed | 6,000 rpm grease / 9,440 rpm oil-air as a light-preload pair |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Internal Clearance | N/A — preloaded bearing |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Mounting Arrangement | Universally matchable — back-to-back, face-to-face or tandem |
| Bearing Material | Chrome bearing steel, SAE 52100 |
| Running Accuracy | P4 |
| Part Number | 7218ETDULP4 |
| Running Accuracy Radial And Axial Runout | P4 — inner ring radial runout Kia 5 µm max, outer ring Kea 5 µm max at this size |
| Cross Reference 1 | SKF 7218 ACD/P4ADGA |
|---|---|
| Cross Reference 2 | NSK 7218A5TRDULP4 |
| Cross Reference 3 | Fafnir 3MM218WICR-DUL |
| Cross Reference 4 | FAG B7218-E-T-P4S-UL |
| Cross Reference 6 | RHP 7218CTDULP4 (related size, 15° contact angle) |
RHP 7218ETDULP4 super precision angular contact ball bearings, supplied as a matched duplex pair. Series: 7200, ISO dimension series 02. Bore: 90 mm. Outside diameter: 160 mm. Width: 30 mm each bearing, 60 mm assembled. Straight bore, open on both faces, ball rolling elements in chrome bearing steel to SAE 52100. Country of origin as recorded: United Kingdom.
Contact Angle: 25°. Cage: laminated phenolic resin, machined and outer-ring guided. Grouping: DU, paired unit. Preload: L, light. Precision Grade: P4, equal to RHP EP7 and ABEC 7. Searchable forms include 7218ETDULP4, 7218-E-T-DUL-P4, 7218 E T DUL P4, the RHP B-series form 7218X3TDUEP7, 7218A5 and the Fafnir cross 3MM218WICR-DUL.
Dynamic Load Rating: 117 kN per bearing. Static Load Rating: 100 kN per bearing. Limiting speed for a single bearing: 7,500 rpm with grease, 11,800 rpm with oil/air. As a light-preload back-to-back pair those figures carry a 0.80 factor, giving 6,000 rpm and 9,440 rpm. A 25° contact angle carries more thrust and less speed than a 15° bearing on the same envelope, and the ISO 02 heavy section gives this size the highest load ratings of the three super precision series. Axial preload across the pair: 1,270 N. Axial stiffness: 304 N/µm.
Two bearings, a matched duplex pair. Universal face control means they mount back-to-back, face-to-face or in tandem at the same light preload, set at manufacture.
Abutment diameters from the RHP super precision tables: shaft shoulder d1 minimum 100 mm, housing shoulder D1 maximum 150 mm, D2 maximum 154 mm. Fillet radius r minimum 2.5 mm, r1 minimum 1.0 mm. Effective load centre a = 44.1 mm. Internal free volume 95.1 cm³ per bearing. Lubrication jet pitch circle 116.7 mm. Mass 2.206 kg per bearing, 4.412 kg for the pair.
Same-specification equivalents at 25° and light preload: NSK 7218A5TRDULP4, Fafnir 3MM218WICR-DUL, SKF 7218 ACD/P4ADGA, FAG B7218-E-T-P4S-UL. RHP 7218CTDULP4 is a related size at 15°.
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