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Super precision angular contact ball bearing, 140 x 190 x 24 mm, 15° contact angle, phenolic cage, ABEC 7, universally ground light preload.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7928CTSULP4 |
| Model | 7928 C T SUL P4 / 71928 / 7928CTRDULP4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 140 mm |
| OD | 190 mm |
| Width | 24 mm |
| Material | Steel |
|---|---|
| Series | 7900 |
| Condition | New |
| Preload | Light |
| Base Number | 71928 |
| Industry Terms | Super precision spindle bearing, machine tool spindle bearing, universally ground angular contact bearing, phenolic cage angular contact, extra light section spindle bearing |
| Common Misspellings | 7928CTSUL P4, 7928 CTSULP4, RHP 7928C TSUL P4, 71928CTSULP-4 |
| Application Types | Machine tool spindles, grinding spindles, high speed rotary tables, precision indexing heads |
| Overall Width | 24 mm |
| Bore Shaft Size | 140 mm |
| Mpn Variants | 7928CTSULP4, 7928-C-T-SUL-P4, 7928 C T SUL P4, 71928CTSULP4, 71928, B7928X2-TA-UL-EP7, B7928X2TAULEP7, 7928CTRDULP4, 2MM9328WICRSUL, 2MM9328WI-SUL |
| Arrangement Configuration | Single bearing, universally ground (SUL) |
| Precision Class | P4 / EP7 / ABEC 7 |
| Additional Attributes | Effective load center a: 34.1 mm. Permissible axial load Pa: 58.0 kN. Axial rigidity at light preload: 150 N/micron. Measured axial clearance at light preload: -19 micron. Shaft abutment da min 149 mm; housing abutment Da max 181 mm, Db max 184 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: 16.7. |
| Min Temp | -30 °C |
| Cage Type | Machined, outer ring land riding |
| Dynamic Load Rating | 100 kN |
| Static Load Rating | 95.5 kN |
| Precision Rating | ABEC 7 / P4 / EP7 |
| Rolling Elements | Balls |
| Max Temp | 120 °C |
| Item Weight | 3.59 lb (1.63 kg) |
| Cage Material | Phenolic laminate |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Internal Clearance | N/A - universally ground for preloaded matching |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Universally matchable - DB, DF or DT |
| Design Units | Metric |
| Bearing Material | Chrome bearing steel |
| Running Accuracy | P4 / ABEC 7 / ISO Class 4 |
| Part Number | 7928CTSULP4 |
| Running Accuracy Radial And Axial Runout | P4 / ABEC 7 / ISO Class 4 |
| Cross Reference 1 | SKF 71928 CDGA/P4A |
|---|---|
| Cross Reference 2 | Fafnir 2MM9328WICRSUL |
| Cross Reference 3 | NSK 7928CTRSULP4 |
| Cross Reference 4 | FAG B71928-C-T-P4S-UL |
| Cross Reference 6 | NSK 7928A5TRSULP4 (related size, 25° contact angle) |
RHP 7928CTSULP4 super precision angular contact ball bearing. Series: 7900, extra light section. ISO designation 71928. Bore: 140 mm. Outside Diameter: 190 mm. Width: 24 mm. Contact Angle: 15°. Single row, open, universally ground. Also written 7928-C-T-SUL-P4, 7928 C T SUL P4 and 71928CTSULP4.
C: 15° contact angle. T: machined laminated phenolic cage, outer ring land riding, rated to 120 °C. SUL: single bearing, universally ground, light preload when matched. P4: EP7, equivalent to ABEC 7. The carton also carries the RHP B-series form B7928X2-TA-UL-EP7, where X2 is the same 15° angle and EP7 the same class.
Basic Dynamic Load Rating: 100 kN. Basic Static Load Rating: 95.5 kN. Permissible Axial Load: 58.0 kN. The 7900 extra light section carries a 140 mm bore in a 190 mm outside diameter over 24 mm of width, keeping a large spindle journal inside a compact housing bore. A 15° contact angle favours speed and radial stiffness. Limiting speed runs to 7,000 rpm on grease and 10,700 rpm on oil or oil-air lubrication. The phenolic cage is light and self lubricating and holds ball guidance steady to 120 °C.
One bearing, universally ground. Universally ground rings let this piece be matched with any other universally ground bearing of the same designation, back-to-back, face-to-face or in tandem, and the preload is achieved by the ground ring faces. Light preload across a matched pair is 632 N, giving 150 N/µm axial rigidity.
Diameter of Shaft Abutment, da min: 149 mm. Diameter of Housing Abutment, Da max: 181 mm and Db max: 184 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. Effective Load Center a: 34.1 mm. Recommended grease quantity: 9.2 g.
ISO base number 71928. Direct equivalents at the same 15° angle and P4 class: NSK 7928CTRSULP4, SKF 71928 CDGA/P4A, FAG B71928-C-T-P4S-UL, Fafnir 2MM9328WICRSUL. Related size at a 25° angle: NSK 7928A5TRSULP4.
$151.78
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