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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
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SKF 71906 CDGA/P4A super-precision angular contact ball bearing, 30 x 47 x 9 mm, 15 deg contact angle, P4A class, extra light preload, universally matchable.
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| MFR / Brand | SKF |
|---|---|
| MPN | 71906 CDGA/P4A |
| GTIN | 7316570511604 |
| Model | 71906 CD P4A DGA / 2MM 9306 WI CR DUL / 7906 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 30 mm |
| OD | 47 mm |
| Width | 9 mm |
| Preload | Extra light (DGA) |
|---|---|
| Material | Chrome Steel |
| Lubricant | Oil Preservative |
| Series | 719 (extra-light section) |
| Duty Type | Precision |
| Rolling Elements | Ball |
| Base Number | 71906 |
| Industry Terms | spindle bearing; machine tool bearing; super precision angular contact bearing; thin section angular contact; 719 series bearing; universally matchable bearing |
| Common Misspellings | 71906 CDGA P4A; 71906CDGA/P4A; 71906 CGDA/P4A; SFK |
| Application Types | High-speed machine tool spindles; grinding heads; precision rotary tables; compact spindle housings |
| Bore Shaft Size | 30 mm |
| Mpn Variants | 71906 CDGA/P4A; 71906CDGAP4A; 71906-CDGA/P4A; 71906-CD-P4A-DGA; 71906 CD/P4ADGA; 71906CDP4ADGA; 71906CD; 71906 |
| Manufacturer Status | Current SKF super-precision designation; SNFA numbers also route to SKF |
| Precision Class | P4A |
| Additional Attributes | Matched condition measuring load class A; universal matching back-to-back, face-to-face or tandem; contact type normal two-point; one-piece inner and outer rings; high-capacity D design; no coating |
| Dynamic Load Rating | 7,150 N |
| Static Load Rating | 4,550 N |
| Precision Rating | P4A |
| Item Weight | 0.060 kg (0.13 lb) |
| Cage Material | Non-metallic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Contact Angle | 15° |
| Part Number | 71906 CDGA/P4A |
| Cross Reference 1 | FAG B71906-C-T-P4S - 15 deg, P4S class |
|---|---|
| Cross Reference 2 | Timken 2MM9306WI CR - 15 deg, P4 class |
| Cross Reference 6 | 7906 (same 30 mm bore, wider section - related size, not a drop-in) |
SKF 71906 CDGA/P4A super-precision angular contact ball bearing: single-row, 719 extra-light section, 15° contact angle, P4A tolerance class, open, with a non-metallic cage and extra light preload (DGA), universally matchable. Unit Quantity: 1 Pc. Country of Origin: Italy. GTIN: 7316570511604.
71906 — SKF 719 series, the extra-light section super-precision angular contact family, 30 x 47 x 9 mm.
CD — 15° contact angle in SKF’s super-precision scheme; ACD is the 25° build.
P4A — SKF super-precision tolerance class, tighter than P5 on bore, outside diameter and running accuracy.
DGA — universally matchable, extra light preload.
Bore Diameter: 30 mm. Outside Diameter: 47 mm. Overall Width: 9 mm. Contact Angle: 15°. Precision Class: P4A. Preload: extra light (DGA). Number Of Rows: 1. Rolling Elements: Ball. Cage Material: Non-metallic. Closure Type: Open. Bore Type: Straight. Bearing Material: Bearing steel. Item Weight: 0.060 kg (0.13 lb).
Dynamic Load Rating: 7,150 N (1,607 lbf). Static Load Rating: 4,550 N (1,023 lbf). Matched condition: measuring load, class A. Universal matching: back-to-back, face-to-face or tandem.
Bore: 30 mm. Outside diameter: 47 mm. Width: 9 mm. Contact type: normal, two-point. Ring type: one-piece inner and outer rings. Design: high-capacity D. Coating: none. Design Units: Metric.
Cross-references: FAG B71906-C-T-P4S (15°, P4S class); Timken Fafnir 2MM9306WI CR (15°, P4 class). The 71906 ACD is the 25° build on the same envelope; DGB and DGC are the light and medium preload grades. The 7906 shares the 30 mm bore in a wider section. SNFA numbers also route to SKF. MPN Variants: 71906 CDGA/P4A, 71906CDGAP4A, 71906-CDGA/P4A, 71906-CD-P4A-DGA, 71906 CD/P4ADGA, 71906CDP4ADGA, 71906CD, 71906.
Bore 30 mm, outside diameter 47 mm, width 9 mm.
The contact angle is 15° (CD) and the tolerance class is P4A.
Extra light preload (DGA). Bearings with the DGA designation are universally matchable back-to-back, face-to-face or tandem.
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