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Double-row cylindrical roller bearing, 130 x 200 x 52 mm, 1:12 tapered bore, machined brass cage, C1 clearance, SP precision. Two roller rows.
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| MFR / Brand | SKF |
|---|---|
| MPN | NN3026KMC481 |
| Model | NN 3026 K M C481 |
| Bearing Type | Cylindrical Roller Bearing, Open |
| ID | 130 mm |
| OD | 200 mm |
| Width | 52 mm |
| Material | Bearing Steel |
|---|---|
| Series | NN 3000 |
| Condition | New – Open box |
| Lubricant | Oil Preservative |
| Base Number | NN 3026 |
| Industry Terms | Spindle bearing; double row cylindrical roller bearing; tapered bore roller bearing; machine tool spindle bearing; precision roller bearing |
| Application Types | Machine tool spindles; lathe and milling spindles; heavy radial load precision spindles |
| Condition Note | Made In USA |
| Bore Shaft Size | 130 mm |
| Mpn Variants | NN3026KMC481; NN-3026-KMC/C481; NN 3026 K M C481; NN-3026-K-M-C481; NN3026KMC/C481; NN3026KM; NN3026 |
| Precision Class | SP |
| Additional Attributes | Taper ratio 1:12, mounts directly on a matching tapered spindle journal. Radial clearance set by axial drive-up on the taper. Two rows of cylindrical rollers in line contact. Ribs on the inner ring locate the roller sets. C481 is a special internal specification with no published decode. |
| Min Temp | -30°C |
| Cage Type | Machined |
| Dynamic Load Rating | 286 kN / 64,295 lbf |
| Static Load Rating | 480 kN / 107,908 lbf |
| Precision Rating | SP (ABEC 5 / P5 equivalent) |
| Rolling Elements | Cylindrical Rollers |
| Max Temp | 150°C |
| Item Weight | 5.49 kg / 12.1 lbs |
| Cage Material | Brass |
| Limiting Speed | 5,600 rpm |
| Number Of Rows | 2 |
| Bore Type | Tapered 1:12 |
| Snap Ring Included | N/A |
| Internal Clearance | C1 |
| Harmonization Code | 8482.50.00.00 |
| Bearing Material | Chrome Steel |
| Running Accuracy | SP |
| Part Number | NN 3026 KMC/C481 |
| Running Accuracy Radial And Axial Runout | SP |
| Cross Reference 1 | FAG NN3026-AS-K-M-SP |
|---|---|
| Cross Reference 2 | NSK NN3026MBKRE44 |
| Cross Reference 3 | NN 3026 (related size, same section, straight bore) |
SKF NN 3026 KMC/C481 double row cylindrical roller bearing. Bore: 130 mm, tapered 1:12. Outside diameter: 200 mm. Width: 52 mm. Series: NN 30. Two rows of cylindrical rollers, machined brass cage, open.
NN: double row cylindrical roller design. 3026: NN 30 series, 130 mm bore. K: tapered bore, 1:12 taper. M: machined brass cage. C in the MC group: a cage execution variant. C481: a special internal specification held to a customer drawing.
Basic dynamic load rating: 286 kN (64,295 lbf). Basic static load rating: 480 kN (107,908 lbf). On cylindrical rollers the static rating sits well above the dynamic rating, and that is the normal relationship for the type. Two rows of rollers in line contact give this bearing very high radial capacity and very high radial stiffness for its section. Limiting speed: 5,600 r/min. Precision class SP, with running accuracy held to match.
The bore is tapered at 1:12 and seats directly on a matching tapered spindle journal. Radial clearance is set by the axial drive-up distance on the taper, which is what allows a very fine clearance setting on a machine tool spindle. Internal clearance class C1, the tightest of the standard super-precision classes.
Cylindrical rollers carry radial load. The ribs on the inner ring locate the roller sets, and axial location for the shaft comes from a separate bearing in the arrangement.
One bearing. Mass: 5.49 kg (12.1 lbs).
Same-envelope equivalents at 130 x 200 x 52 mm with a 1:12 tapered bore and machined brass cage: FAG NN3026-AS-K-M-SP, NSK NN3026MBKRE44. The straight-bore NN 3026 is a related size at the same section. Searchable forms: NN3026KMC481, NN-3026-KMC/C481, NN 3026 K M C481, NN-3026-K-M-C481, NN3026KM, NN3026.
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