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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:
6 in stock
Super precision angular contact ball bearing, 45x85x19 mm, 15 degree contact angle, duplex pair at light preload, phenolic cage, 51,500 N dynamic rating.
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$274.62
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| MFR / Brand | NSK |
|---|---|
| MPN | 7209CTDULPA7 |
| Model | 7209C T DUL PA7 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 45 mm |
| OD | 85 mm |
| Width | 19 mm |
| Material | Chrome Steel |
|---|---|
| Series | NSK 7200C Super Precision |
| Lubricant | Grease or oil/oil-air |
| Preload | Light (L) |
| Base Number | 7209C |
| Industry Terms | Super precision bearing; spindle bearing; precision angular contact; matched pair; duplex set; 15 degree ACBB; phenolic cage bearing |
| Common Misspellings | 7209 CT DUL PA7; 7209CTDULP A7; 7209CT-DULPA7; NSK7209C; 7209 C T DUL PA 7 |
| Application Types | Machine tool spindles; grinding spindles; high-speed motor spindles; precision rotary tables; test and metrology equipment |
| Overall Width | 19 mm |
| Mpn Variants | 7209CTDULPA7; 7209C T DUL PA7; 7209-C-T-DUL-PA7; 7209CTDUL; 7209C/DUL |
| Additional Attributes | Effective load centre a: 18.2 mm; Permissible axial load Pa: 19.6 kN; da min 52 mm; Da max 78 mm; Db max 80 mm; r min 1.1 mm; r1 min 0.6 mm; ra max 1 mm; rb max 0.6 mm; recommended grease quantity 2.5 g per bearing; accuracy grades offered in this size: P5, P4, P4Y, P3; cage options offered: T, TR, TX, TA, TY, TYN, TSR; preload classes offered: EL, L, M, H |
| Cage Type | Outer-ring guided |
| Dynamic Load Rating | 51,500 N |
| Static Load Rating | 28,800 N |
| Rolling Elements | Ball |
| Item Weight | 0.406 kg (0.895 lb) per bearing |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Limiting Speed | 17,700 rpm grease; 27,000 rpm oil |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Duplex universal (DU) |
| Bearing Material | Steel |
| Cross Reference 1 | SKF 7209 CD/P4A |
|---|---|
| Cross Reference 2 | FAG B7209-C-T-P4S |
| Cross Reference 3 | Timken/Fafnir 2MM9209WI |
| Cross Reference 4 | Barden 209HC |
| Cross Reference 5 | RHP 7209CT |
| Cross Reference 6 | Koyo 7209C |
| Cross Reference 7 | NTN 7209C |
| Cross Reference 8 | NACHI 7209C |
| Cross Reference 9 | SKF 7209 ACD/P4A — same envelope at 25°, related not equivalent |
NSK 7209C T DUL PA7 is a super-precision single-row angular contact ball bearing supplied as a universally ground duplex pair. Bore Diameter: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm. Contact Angle: 15°. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing. Cage Material: Phenolic. Cage Type: Outer-ring guided. Bearing Material: Steel. Series: NSK 7200C super precision. Base Number: 7209C.
7209 — 72 heavy series super-precision angular contact ball bearing in the 09 bore size, giving a 45 mm bore in a larger section than the 70 series.
C — 15° contact angle.
T — phenolic resin cage, guided on the outer ring.
DU — duplex universal, a matched pair that mates back-to-back, face-to-face or in tandem.
L — light preload class.
PA7 — NSK execution suffix.
Dynamic Load Rating: 51,500 N (11,578 lbf) per bearing. Static Load Rating: 28,800 N (6,475 lbf) per bearing. Limiting Speed: 17,700 rpm grease; 27,000 rpm oil. Permissible axial load Pa: 19.6 kN per bearing. Item Weight: 0.406 kg (0.895 lb) per bearing. Lubricant: grease or oil/oil-air, at a recommended grease quantity of 2.5 g per bearing.
Effective load centre a: 18.2 mm. Shaft abutment diameter da min: 52 mm. Housing abutment diameter Da max: 78 mm. Housing abutment diameter Db max: 80 mm. Chamfer r min: 1.1 mm. Chamfer r1 min: 0.6 mm. Shaft fillet ra max: 1 mm. Housing fillet rb max: 0.6 mm.
Unit Quantity: 2 Pcs. Mounting Arrangement: duplex universal (DU). Preload: Light (L). Load ratings and mass are stated per bearing, not for the set.
Equivalents at the same 45 × 85 × 19 mm envelope and 15° contact angle include SKF 7209 CD/P4A, FAG B7209-C-T-P4S, Timken/Fafnir 2MM9209WI, Barden 209HC, RHP 7209CT, Koyo 7209C, NTN 7209C and NACHI 7209C. SKF 7209 ACD/P4A shares the same envelope at 25° and is related, not equivalent.
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