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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:
3 in stock
Double-row angular contact ball bearing, 45 mm bore x 85 mm OD x 30.2 mm wide (1-3/16 in), open both faces. Takes radial load plus thrust in both directions from a single bearing seat and resists shaft tilting. Supplied as 1 Pc.
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$32.94
3 in stock
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| MFR / Brand | SNR |
|---|---|
| MPN | 3209A |
| Model | 5209A 3209.A |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 45 mm |
| OD | 85 mm |
| Width | 1-3/16 in |
| Material | Bearing Steel |
|---|---|
| Series | 3200 |
| Lubricant | Oil Preservative |
| Base Number | 3209 |
| Industry Terms | double row angular contact bearing, 3209 bearing, two-way thrust ball bearing, 5209 bearing, 45mm bore angular contact |
| Common Misspellings | SNR 3209 A, 3209.A SNR, SNR 32O9A, 3209A bearing, SNR 5209A, 3209A ZZ |
| Application Types | Pumps, gearboxes, fans and blowers, conveyor drives, hoists, machine tool spindles |
| Bore Shaft Size | 45 mm (1.7717 in) |
| Mpn Variants | 3209A, 3209.A, 3209 A, 3209-A, 5209A, 5209, 3209 |
| Arrangement Configuration | Single double-row bearing, thrust both directions |
| Min Temp | -20 °C |
| Cage Type | Pressed |
| Dynamic Load Rating | 45.7 kN / 10274 lbf |
| Static Load Rating | 37.2 kN / 8363 lbf |
| Precision Rating | ABEC 1 / P0 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 1.29 lbs |
| Cage Material | Nylon |
| Limiting Speed | 7500 rpm |
| Number Of Rows | 2 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Relubrication Feature | No |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 30° nominal |
| Design Units | Metric |
| Bearing Material | Through-hardened bearing steel |
| Internal Clearance | CN |
| Part Number | 3209A |
| Cross Reference 1 | SKF 3209 A |
|---|---|
| Cross Reference 2 | FAG 3209-B-TVH |
| Cross Reference 3 | NSK 3209B |
| Cross Reference 4 | Nachi 5209 |
| Cross Reference 6 | 3209 (ISO base number) |
An SNR 3209A double-row angular contact ball bearing — 45 mm bore, 85 mm outside diameter, 30.2 mm (1-3/16 in) width, open on both faces. Two rows of balls run on opposed angled raceways inside one pair of rings, so a single bearing carries radial load, thrust in both directions, and moment load from an overhung wheel or pulley.
3209 – double-row angular contact ball bearing, 45 mm bore, 85 mm OD, 30.2 mm width
A – SNR design generation letter
Nominal contact angle for the double-row 3200 / 5200 family: 30°
No closure suffix, so both faces are open
No clearance suffix, so internal clearance is normal (CN)
The two opposed rows are what give this bearing thrust capacity in both directions, so it replaces a back-to-back pair of single-row bearings and shortens the assembly. The span between the rows also resists tilting, which matters on an overhung fan wheel or belt pulley. The 30.2 mm width is the double-row width: a 6209 deep groove bearing in the same 45 x 85 mm envelope is 19 mm wide, carries much less thrust, and is not a substitute. With both faces open, the housing supplies and retains the lubricant, and an external seal handles contamination.
Bore: 45 mm (1.7717 in)
Outside diameter: 85 mm (3.3465 in)
Width: 30.2 mm (1-3/16 in)
Rows: 2
Contact angle: 30° nominal
Rolling elements: balls
Closure: open both faces
Internal clearance: CN (normal)
Thrust capability: both directions
Material: through-hardened bearing steel
Sold as 1 Pc. One complete double-row bearing, open on both faces. No seal, shield, snap ring, spacer or lock nut is included.
Mounting force is applied to the ring being fitted so that no load passes through the balls. Because the bearing locates the shaft axially in both directions, it is clamped in the housing between a shoulder and an end cap, and the second bearing on the shaft is left free to float axially. The open faces take lubricant from the housing cavity, packed to roughly one third of its free volume for grease service.
The direct equivalent is an open double-row angular contact ball bearing in the 45 x 85 x 30.2 mm envelope: SKF 3209 A, FAG 3209-B-TVH, NSK 3209B, Nachi 5209, MRC 5209. Shielded and sealed versions such as 3209-2Z and 5209-2RS share the envelope but differ in closure and running friction, so those are related versions rather than drop-in equivalents. A 6209 single-row deep groove bearing is not an interchange.
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