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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
2 in stock
Super precision angular contact ball bearing, 30x47x9 mm, 25° contact angle at P4S accuracy, with a phenolic cage and universally matchable light preload.
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$78.21
2 in stock
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| MFR / Brand | Timken |
|---|---|
| MPN | 3MV9306WI CR SUL |
| GTIN | 053893200156 |
| Model | 3MV9306WI CRSUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 30 mm |
| OD | 47 mm |
| Width | 9 mm |
| Material | 52100 Chrome Steel |
|---|---|
| Series | 71900 |
| Base Number | 71906 / 9306 |
| Industry Terms | spindle bearing, super precision angular contact, machine tool bearing, universally matchable single, ABEC-7 angular contact, phenolic cage spindle bearing |
| Common Misspellings | 71906 E T P4 SUL, 71906ETP4SUL, 3MV9306WI CRSUL, 3MV 9306 WI CR SUL, 71906-E-T-P4S, B71906E |
| Application Types | Machine tool spindles, grinding heads, high-speed rotary tables, boring heads, ball screw supports, precision gearboxes, dental and router spindles |
| Bore Shaft Size | 30 mm |
| Mpn Variants | 3MV9306WICRSUL, 3MV9306WI CRSUL, 3MV9306WICRSU L, 71906E-T-P4-SUL, B71906-E-T-P4S-UL, B71906E T P4S UL, B71906ETP4SUL, 71906E-T-P4S-UL |
| Compatible With Replaces | FAG B71906-E-T-P4S-UL (25 deg, 1:1). Fafnir 3MM9306WI DUL is a 15 deg duplex pair, not interchangeable. |
| Precision Class | P4S (P4 running accuracy with P2 axial runout) |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.5028 |
| Contact Angle | 25° |
| Part Number | 3MV9306WICRSUL |
| Cross Reference 1 | FAG B71906-E-T-P4S-UL |
|---|---|
| Cross Reference 9 | Fafnir 3MM9306WI DUL - 15 deg duplex pair, not 25 deg single |
Super precision single-row angular contact ball bearing in the extra-light 719 dimension series. Bore Diameter: 30 mm. Outside Diameter: 47 mm. Width: 9 mm. Contact Angle: 25°. Accuracy Class: ISO P4S. Cage: phenolic (fabric-laminate), outer-ring-land riding. Rolling Elements: steel balls. Configuration: single bearing, universally matchable, light preload. A spindle bearing for machine tool spindles, grinding heads, high-speed rotary tables and precision gear trains.
B — steel balls. Hybrid ceramic-ball versions carry HC or HCB.
719 — extra-light dimension series.
06 — 30 mm bore.
E — 25° contact angle.
T — phenolic / fabric-laminate cage.
P4S — ISO P4S accuracy: P4 running accuracy combined with P2-level axial runout.
UL — single bearing, universally matchable (U), light preload (L).
3 — ABEC-7 / ISO P4 accuracy class.
MV — 25° contact angle, super precision. In the Fafnir WI system MM denotes 15° and MV denotes 25°.
9306 — 719 dimension series, 30 mm bore.
WI — spindle bearing construction.
CR — outer-ring-land-riding phenolic cage.
SUL — single bearing, universally matchable, light preload.
Dynamic Radial Load Rating Cr: 8.1 kN. Static Radial Load Rating C0r: 4.15 kN. Fatigue Limit Load Cu: 0.425 kN. Reference Speed: 43,000 rpm. Limiting Speed: 28,000 rpm. Weight: 0.050 kg.
A 25° angle directs a greater share of the load along the axial path, giving more axial stiffness and thrust capacity than a 15° angle, at the cost of lower speed capability and more heat at high rpm. A 15° angle (C / MM code) gives higher speed capability with lower stiffness and thrust capacity. Members of a matched spindle stack share one contact angle and one preload class.
A universally ground single bearing has ring faces ground so that any two bearings of the same designation assemble back-to-back (DB), face-to-face (DF) or in tandem (DT) and produce the correct light preload with no shims. Three or four units build a triplet or quad stack.
Unit Quantity: 1 Pc. One single, universally matchable, light-preload bearing.
FAG B71906-E-T-P4S-UL: 25°, the same bearing under FAG’s designation scheme. Timken 3MV9306WICRSUL: 25°, the same bearing under Timken’s WI scheme. Fafnir 3MM9306WI DUL is a related part: 15° contact angle and a duplex matched pair, not a 25° single.
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