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Super precision angular contact ball bearing, 100 x 150 x 24 mm, 15° contact angle, phenolic cage, ABEC 7, heavy preload duplex pair.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7020CTDUHP4 |
| Model | 7020C T DUH P4 / 2MM9120WI CR DUH |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 100 mm |
| OD | 150 mm |
| Width | 24 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7000 |
| Condition | New |
| Preload | Heavy |
| Base Number | 7020 |
| Industry Terms | Super precision spindle bearing, machine tool spindle bearing, duplex pair, universally ground angular contact bearing, phenolic cage angular contact, heavy preload spindle set |
| Common Misspellings | 7020CTDUH P4, 7020 CTDUHP4, RHP 7020C TDUH P4, 7020CTDUHP-4 |
| Application Types | Machine tool spindles, grinding spindles, high speed rotary tables, precision gearboxes |
| Total Width | 48 mm for the duplex pair |
| Overall Width | 24 mm |
| Bore Shaft Size | 100 mm |
| Mpn Variants | 7020CTDUHP4, 7020-C-T-DUH-P4, 7020C T DUH P4, 7020CTDUH P4, 2MM9120WICRDUH, 2MM9120WI-CR-DUH |
| Arrangement Configuration | Duplex pair, universally ground (DUH) |
| Precision Class | P4 / EP7 / ABEC 7 |
| Additional Attributes | Effective load center a: 28.7 mm. Permissible axial load Pa: 49.0 kN. Axial rigidity at heavy preload: 264 N/micron. Measured axial clearance at heavy preload: -60 micron. Shaft abutment da min 109 mm; housing abutment Da max 141 mm, Db max 144 mm. Fillet radii ra max 1.5 mm, rb max 0.8 mm. Bearing chamfer r min 1.5 mm, r1 min 1 mm. Calculation factor f0: 16.0. |
| Min Temp | -30°C |
| Cage Type | Machined, outer ring land riding |
| Dynamic Load Rating | 95.0 kN per bearing |
| Static Load Rating | 77.0 kN per bearing |
| Precision Rating | ABEC 7 / P4 / EP7 |
| Rolling Elements | Balls |
| Max Temp | 120 °C |
| Item Weight | 2.80 lb (1.27 kg) each; 5.60 lb (2.54 kg) for the pair |
| Cage Material | Phenolic laminate |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Internal Clearance | N/A - preloaded set |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Universally matchable - DB, DF or DT |
| Design Units | Metric |
| Bearing Material | Chrome bearing steel |
| Part Number | 7020CTDUHP4 |
| Running Accuracy Radial And Axial Runout | ABEC 7 / ISO Class 4 |
| Cross Reference 1 | SKF 7020 CD/P4ADGC |
|---|---|
| Cross Reference 2 | FAG B7020-C-T-P4S-DUH |
| Cross Reference 3 | Fafnir 2MM9120WICRDUH |
| Cross Reference 4 | SNR 7020CVDUJ94 |
| Cross Reference 5 | NSK 7020CTRDUHP4 |
RHP 7020CTDUHP4 super precision angular contact ball bearing. Series: 7000. Bore: 100 mm. Outside Diameter: 150 mm. Width: 24 mm. Contact Angle: 15°. Single row, open, universally ground and matchable. Also written 7020-C-T-DUH-P4, 7020C T DUH P4 and 7020CTDUH P4.
C: 15° contact angle. T: machined laminated phenolic cage, outer ring land riding, rated to 120 °C. DUH: duplex pair, universally ground, heavy preload. P4: EP7, equivalent to ABEC 7. Fafnir cross designation 2MM9120WICRDUH carries the same 15° angle and phenolic outer land riding cage.
Basic Dynamic Load Rating: 95.0 kN per bearing. Basic Static Load Rating: 77.0 kN per bearing. Permissible Axial Load: 49.0 kN. A 15° contact angle favours speed and radial stiffness, which is why it is the standard choice for machine tool spindle front and rear positions. Limiting speed runs to 9,200 rpm on grease and 14,000 rpm on oil or oil-air lubrication. The phenolic cage is light and self lubricating and holds ball guidance steady to 120 °C.
Heavy preload, 2,572 N across a back-to-back or face-to-face pair, giving 264 N/µm axial rigidity and 60 µm measured axial clearance. Effective Load Center a: 28.7 mm. Heavy preload buys the highest axial and radial stiffness in the range and the tightest shaft location, at the cost of more heat generation than a light or medium set.
Two bearings, supplied as a universally ground duplex pair at heavy preload. Universally ground rings mount back-to-back, face-to-face or in tandem, with the preload set by the ground ring faces.
Diameter of Shaft Abutment, da min: 109 mm. Diameter of Housing Abutment, Da max: 141 mm and Db max: 144 mm. Radius of Shaft or Housing Fillet, ra max: 1.5 mm, rb max: 0.8 mm. Bearing chamfer r min: 1.5 mm, r1 min: 1 mm. Recommended grease quantity: 6.7 g per bearing.
ISO base number 7020. Direct equivalents at the same 15° angle, P4 class and heavy preload: NSK 7020CTRDUHP4, SKF 7020 CD/P4ADGC, FAG B7020-C-T-P4S-DUH, Fafnir 2MM9120WICRDUH.
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