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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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1 in stock
Super-precision angular contact ball bearing, 50x72x12 mm, 25 degree contact angle, ABEC 7 / P4, supplied as a light-preload universal duplex pair.
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$255.24
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| MFR / Brand | NSK |
|---|---|
| MPN | 7910A5TYDULP4 |
| GTIN | 029176076008 |
| Model | 7910A5TYDULP4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 50 mm |
| OD | 72 mm |
| Width | 12 mm |
| Material | Bearing Steel |
|---|---|
| Series | 71900 / 7900 super-precision |
| Lubricant | Grease or oil; recommended grease quantity 0.84 g per bearing |
| Preload | Light (L) |
| Base Number | 7910 |
| Industry Terms | Super precision bearing; spindle bearing; matched pair; angular contact ball bearing; ABEC 7 |
| Common Misspellings | 7910A5TYDULP-4; 7910 A5TY DULP4; 7901A5TYDULP4; 7910A5TYDLUP4 |
| Application Types | Machine tool spindles; grinding spindles; high-speed rotary tables; precision motion control |
| Overall Width | 12 mm |
| Mpn Variants | 7910A5TYDULP4; 7910A5 TY DUL P4; 7910-A5-TY-DUL-P4; 71910A5TYDULP4; 7910A5TYDUL |
| Precision Class | ABEC 7 / P4 |
| Additional Attributes | Effective load center a: 20.2 mm; permissible axial load Pa: 11.0 kN; da min 55 mm; Da max 67 mm; Db max 69.5 mm; ra max 0.6 mm; r min 0.6 mm; r1 min 0.3 mm |
| Cage Type | Ball-guided |
| Dynamic Load Rating | 20,100 N |
| Static Load Rating | 14,200 N |
| Rolling Elements | Ball |
| Item Weight | 0.132 kg (0.29 lb) |
| Number Of Rows | 1 per bearing |
| Bore Type | Cylindrical |
| Snap Ring Included | Without Snap Ring |
| Limiting Speed | 16,400 rpm grease; 24,600 rpm oil |
| Harmonization Code | 8482.10 |
| Contact Angle | 25° |
| Mounting Arrangement | DUL — universally matched duplex pair, light preload |
| Bearing Material | Bearing steel |
| Cross Reference 1 | NSK 71910A5 - alternate NSK prefix, same bearing |
|---|---|
| Cross Reference 2 | SKF 71910 ACD/P4ADGA - 25 deg, P4A, extra light preload |
| Cross Reference 3 | FAG B71910-E-T-P4S-DUL - 25 deg, P4S, phenolic cage |
| Cross Reference 4 | NTN 7910UADG/GNP4 - 25 deg, P4, normal preload, not light |
| Cross Reference 5 | Koyo HAR910C - 15 deg, related size, not a substitute |
NSK 7910A5TYDULP4 is a super-precision angular contact ball bearing supplied as a universally matched duplex set. Bore Diameter: 50 mm. Outside Diameter: 72 mm. Overall Width: 12 mm. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Closure Type: Open. Bearing Material: Bearing steel. Series: 71900 super-precision. Base Number: 7910.
7910 — super-precision angular contact ball bearing, 19 dimension series, 50 mm bore.
A5 — 25° contact angle.
TY — ball-guided cage.
DUL — universally matched duplex set, light preload.
P4 — ISO class 4 precision, ABEC 7 equivalent.
Dynamic Load Rating: 20,100 N. Static Load Rating: 14,200 N. Contact Angle: 25°. Limiting Speed: 16,400 rpm grease; 24,600 rpm oil. Precision Class: ABEC 7 / P4. Preload: Light. Cage Type: Ball-guided. Item Weight: 0.132 kg (0.29 lb). Load ratings and mass are per bearing, not per set.
Bore Type: Cylindrical. Shaft abutment diameter da min: 55 mm. Housing abutment diameter Da max: 67 mm. Housing abutment diameter Db max: 69.5 mm. Fillet radius ra max: 0.6 mm. Chamfer r min: 0.6 mm. Chamfer r1 min: 0.3 mm. Effective load center a: 20.2 mm. Permissible axial load Pa: 11.0 kN. Recommended grease quantity: 0.84 g per bearing. Lubricant: Grease or oil.
Unit Quantity: 2 Pcs. Mounting Arrangement: DUL universal duplex, light preload — the pair may be set back-to-back, face-to-face or in tandem and reaches the stated light preload without shims.
Closest first, 25° duplex types in the 50 x 72 x 12 mm size: NSK 71910A5 (alternate NSK prefix), SKF 71910 ACD/P4ADGA (P4A, extra light preload, lighter than DUL), FAG B71910-E-T-P4S-DUL (P4S, phenolic cage) and NTN 7910UADG/GNP4 (P4, normal preload, not light). Cage and preload class differ between makers, so confirm against the application. Koyo HAR910C is a 15° related size, not a substitute.
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