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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
9 in stock
Super-precision angular contact ball bearing, 45 x 85 x 19 mm, 25° contact angle, ball-guided cage, medium preload, matched duplex pair. Cr 49 kN.
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$198.05
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| MFR / Brand | NSK |
|---|---|
| MPN | 7209A5TYDUM |
| Model | 7209 A5 TY DUM / 3MM209 WI CR DUM / B7209E |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 45 mm |
| OD | 85 mm |
| Width | 19 mm |
| Material | High Carbon Chrome Steel |
|---|---|
| Series | 7200 |
| Lubricant | Grease or oil |
| Preload | Medium |
| Base Number | 7209 |
| Total Width | 38 mm (duplex pair) |
| Bore Shaft Size | 45 mm |
| Mpn Variants | 7209A5TYDUM, 7209-A5-TY-DUM, 7209E |
| Additional Attributes | Effective load centre a: 24.7 mm; shaft abutment da min 52 mm; housing abutment Da max 78 mm; Db max 80 mm; chamfer r min 1.1 mm; r1 min 0.6 mm; fillet ra max 1.0 mm; rb max 0.6 mm; permissible axial load Pa 23.3 kN; medium preload 875 N; axial rigidity 212 N/um; measured axial clearance -22 um |
| Dynamic Load Rating | 49.0 kN |
| Static Load Rating | 27.6 kN |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Limiting Speed | 15,400 r/min grease; 23,100 r/min oil-air |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Cross Reference 1 | 7209E |
|---|
NSK 7209A5TYDUM is a super-precision single-row angular contact ball bearing in the ISO 72 dimension series, supplied as a universally ground duplex pair set to medium preload. Bore: 45 mm. Outside Diameter: 85 mm. Width: 19 mm per bearing. Contact Angle: 25°. Cage Type: Ball-guided. Preload: Medium. Rolling Elements: Steel balls. Closure Type: Open. Bearing Material: Chrome steel.
7209 — NSK’s number for the ISO 7209 size, 45 x 85 x 19 mm.
A5 — 25° contact angle.
TY — ball-guided cage.
DU — universally ground duplex pair.
M — medium preload.
Dynamic Load Rating (Cr): 49.0 kN. Static Load Rating (C0r): 27.6 kN. Permissible Axial Load (Pa): 23.3 kN. Limiting Speed: 15,400 r/min on grease, 23,100 r/min on oil-air. Axial Preload at medium: 875 N in a back-to-back or face-to-face pair. Axial Rigidity: 212 N/µm. Measured Axial Clearance: −22 µm. A 25° contact angle sits between the 15° high-speed and 40° high-thrust executions and is the usual choice where a spindle has to carry a real axial load and still turn fast. Medium preload buys the rigidity figure above at the cost of speed against a light-preload set.
Effective Load Centre (a): 24.7 mm. Shaft Abutment Diameter (da min): 52 mm. Housing Abutment Diameter (Da max): 78 mm. Second Housing Abutment Diameter (Db max): 80 mm. Chamfer (r min): 1.1 mm. Chamfer (r1 min): 0.6 mm. Shaft and Housing Fillet Radius (ra max): 1.0 mm. Fillet Radius (rb max): 0.6 mm.
Matched duplex pair, 2 Pcs. Universal facing means the pair reaches its medium preload clamped back-to-back, face-to-face or in tandem without ground spacers. Total Width across the pair: 38 mm.
The same bearing is written 7209A5TYDUM, 7209-A5-TY-DUM and, in the RHP and Fafnir angle notation carried on the carton, 7209E. The 7209C and 7209A executions share the 45 x 85 x 19 mm envelope at 15° and 30°; they fit the same shaft and housing but shift the load split between radial and axial, so they are related sizes rather than direct substitutions.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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