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Timing Belt Pulleys and V-Belt Sheaves: Matching Belt Drive Components Correctly
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Availability:
6 in stock
RHP 7218ETDUMP4 super precision angular contact ball bearing duplex pair, 90 x 160 x 30 mm, 25° contact angle, phenolic cage, ABEC 7, medium preload.
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$705.89
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| MFR / Brand | RHP |
|---|---|
| MPN | 7218ETDUMP4 |
| Model | 7218 E T DUM P4 / 3MM218WI CR DUM / 7218A5 7218AC |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 90 mm |
| OD | 160 mm |
| Width | 30 mm |
| Series | 7200 |
|---|---|
| Preload | Medium |
| Base Number | 7218 |
| Industry Terms | Super precision spindle bearing, machine tool spindle bearing, duplex pair, universally ground angular contact bearing, phenolic cage angular contact, 25 degree angular contact bearing |
| Common Misspellings | 7218ETDUM P4, 7218 ETDUMP4, RHP 7218E TDUM P4, 7218ETDUMP-4 |
| Application Types | Machine tool spindles, vertical spindles, precision screw drives, high load rotary tables |
| Overall Width | 30 mm |
| Bore Shaft Size | 90 mm |
| Mpn Variants | 7218ETDUMP4, 7218E-T-DUM-P4, 7218 E T DUM P4, 7218ETDUM P4, B7218X3TADUMEP7, B-7218-X3-TA-DUM-EP7, 3MM218WICRDUM, 3MM218WI-CR-DUM, 7218A5, 7218AC |
| Precision Class | ABEC 7 / P4 (EP7) |
| Cage Type | Machined, outer ring land riding |
| Dynamic Load Rating | 147,000 N per bearing |
| Static Load Rating | 100,000 N per bearing |
| Rolling Elements | Balls |
| Cage Material | Phenolic |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Limiting Speed | 8,000 rpm grease; 12,000 rpm oil or oil-air |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 7218ETDUMP4 |
| Cross Reference 1 | NSK 7218A5TRDUMP4 |
|---|---|
| Cross Reference 2 | SKF 7218 ACD/P4ADGB |
| Cross Reference 3 | FAG B7218E.T.P4S.DUM |
| Cross Reference 4 | Fafnir 3MM218WICRDUM |
| Cross Reference 5 | NSK 7218CTRDUMP4 (15°, related) |
RHP 7218ETDUMP4 super precision angular contact ball bearing, supplied as 2 Pcs: one universally ground duplex pair at medium preload. Bore Diameter: 90 mm. Outside Diameter: 160 mm. Width: 30 mm. Contact Angle: 25°. Single row per bearing, open.
7218 — ISO 72 series size, 90 x 160 x 30 mm.
E — 25° contact angle.
T — machined laminated phenolic cage, outer ring land riding.
DUM — duplex pair, universally ground, medium preload.
P4 — EP7, equivalent to ABEC 7.
B7218X3TADUMEP7 — RHP B-series designation carried on the carton, 25°.
3MM218WICRDUM — Fafnir designation carried on the carton, 25°.
Bore Diameter: 90 mm.
Outside Diameter: 160 mm.
Width: 30 mm.
Contact Angle: 25°.
Precision Class: ABEC 7 / P4 (EP7).
Preload: Medium, 2,899 N per pair.
Axial Rigidity: 416 N/µm.
Dynamic Load Rating: 147,000 N per bearing.
Static Load Rating: 100,000 N per bearing.
Permissible Axial Load: 83,500 N.
Limiting Speed: 8,000 rpm grease; 12,000 rpm oil or oil-air.
Cage Material: Laminated phenolic, machined, rated to 120 °C.
Effective Load Center a: 44.1 mm.
Rolling Elements: Balls.
Closure Type: Open.
Series: 7200.
Unit Quantity: 2 Pcs.
Country of Origin: United Kingdom.
Diameter of Shaft Abutment, da min: 100 mm. Diameter of Housing Abutment, Da max: 150 mm and Db max: 154 mm. Radius of Shaft or Housing Fillet, ra max: 2 mm, rb max: 1 mm. Bearing chamfer r min: 2 mm, r1 min: 1 mm. Recommended grease quantity: 12 g per bearing. Arrangement: universally ground rings, mountable back-to-back, face-to-face or in tandem.
Cross-references at 25° and medium preload: NSK 7218A5TRDUMP4; SKF 7218 ACD/P4ADGB; FAG B7218E.T.P4S.DUM; Fafnir 3MM218WICRDUM. Related at 15°: NSK 7218CTRDUMP4. Also written as 7218E-T-DUM-P4, 7218 E T DUM P4, 7218ETDUM P4, 7218A5 and 7218AC.
25°, from the E in the designation; the carton Fafnir 3MM and B-series X3 codes also give 25°.
A universally ground duplex pair at medium preload.
Dynamic 147,000 N and static 100,000 N per bearing; limiting speed 8,000 rpm on grease and 12,000 rpm on oil or oil-air.
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Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Tapered, cylindrical, and spherical roller bearings all solve the same basic problem, carrying more load
If you pulled a bearing off general industrial equipment at random, there’s a good chance
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