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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, 65 x 120 x 23 mm, 15° contact angle, universally ground with heavy preload, phenolic cage. 1 Pc.
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$179.75
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| MFR / Brand | NSK |
|---|---|
| MPN | 7213CTRSUHP4Y |
| Model | 7213C TR DUH P4Y |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 65 mm |
| OD | 120 mm |
| Width | 23 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Base Number | 7213 |
| Industry Terms | Super precision spindle bearing; 15 degree angular contact; phenolic cage spindle bearing; ABEC 7 bearing; heavy preload spindle bearing; machine tool spindle bearing |
| Common Misspellings | 7213 CTRSUHP4Y; 7213CTRSUH P4Y; 7213CTSUHP4Y; NSK 7213 C TR SUH P4Y; angular contct bearing |
| Bore Shaft Size | 65 mm (2.5591 in) |
| Mpn Variants | 7213CTRSUHP4Y; 7213CTRDUHP4Y; 7213-CTR-DUH-P4Y; 7213C TR DUH P4Y; 7213CTRSUH; 7213C |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Part Number | 7213CTRSUHP4Y |
| Cross Reference 1 | SKF 7213 CDGC/P4A - P4 class, looser than P4Y |
|---|---|
| Cross Reference 2 | FAG B7213-C-T-P4S-UH - P4 class, looser than P4Y |
| Cross Reference 3 | Fafnir 2MM213WI-SUH - WI numbering, 15 deg, heavy preload |
| Cross Reference 4 | NSK 7213CTRSULP4Y - light preload, same 15 deg angle |
NSK 7213CTRSUHP4Y super-precision angular contact ball bearing. Bore Diameter: 65 mm. Outside Diameter: 120 mm. Overall Width: 23 mm. Contact Angle: 15°. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Rolling Elements: Ball. Cage: machined phenolic, riding on the outer ring land.
72 is the ISO medium angular contact dimension series and 13 is the bore code, giving a 65 mm bore. C denotes a 15° contact angle in the NSK scheme. TR is an outer-ring-guided phenolic cage. U marks universal grinding and H sets heavy preload. P4Y is an NSK special accuracy class held tighter than P4, which the carton also states as ABEC7.
A 15° contact angle favours speed and radial stiffness over thrust capacity, which is the usual choice for a high-rpm grinding or milling spindle. Heavy preload takes stiffness and running accuracy to their maximum for that angle, holding shaft position under interrupted cut, and pays for it in heat generation and a lower speed ceiling. Guiding the phenolic cage on the outer ring land keeps it stable at the top of the speed range, and the P4Y class holds ring runout inside the ordinary P4 limits.
Unit Quantity: 1 Pc. Universal grinding means any two units of this designation stack directly as a back-to-back, face-to-face or tandem set, with the heavy preload built into the ground ring faces. A single-row angular contact bearing takes thrust in one direction.
Ring faces are ground flat and square for direct abutment, and the heavy preload is built into the ground ring faces. Phenolic cages suit oil mist and circulating oil lubrication.
Cross-Reference 1: SKF 7213 CDGC/P4A. Cross-Reference 2: FAG B7213-C-T-P4S-UH. Cross-Reference 3: Fafnir 2MM213WI-SUH. All three are 65 x 120 x 23 mm at a 15° contact angle with heavy preload, in ordinary P4 class against the P4Y of this bearing.
Cross-Reference 4: NSK 7213CTRSULP4Y, light preload at the same 15° contact angle.
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