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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:
3 in stock
Double-row precision cylindrical roller bearing, 55 mm tapered bore x 90 mm OD x 26 mm wide, 1:12 taper, machined brass cage, non-locating design for machine-tool spindles. Sold as 1 Pc.
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$143.79
3 in stock
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| MFR / Brand | SKF |
|---|---|
| MPN | NN-3011-AKMC/C4817 |
| Model | NN 3011 A K M C4817 NN3011KMP5 |
| Bearing Type | Cylindrical Roller Bearing, Open |
| ID | 55 mm |
| OD | 90 mm |
| Width | 26 mm |
| Material | Bearing Steel |
|---|---|
| Series | 30 |
| Lubricant | Grease |
| Base Number | NN3011K |
| Industry Terms | double row cylindrical roller, spindle bearing, tapered bore roller bearing, precision roller bearing, machine tool spindle bearing |
| Common Misspellings | SKF NN3011AKMC C4817, NN-3011-AKM-C4817, NN3O11, SKF NN 3011 AKMC, NN3011AKMCC481 |
| Application Types | Grinding spindles, turning and milling spindles, precision gearboxes, rolling mill work rolls |
| Bore Shaft Size | 55 mm (2.1654 in), tapered 1:12 |
| Mpn Variants | NN-3011-AKMC/C4817, NN3011AKMC/C4817, NN 3011 A K M C4817, NN3011-A-K-M-P5, NN3011K, NN3011KM |
| Rolling Elements | Cylindrical |
| Number Of Rows | 2 |
| Bore Type | Tapered |
| Snap Ring Included | No |
| Harmonization Code | 8482.50.00 |
| Part Number | NN-3011-AKMC/C4817 |
| Cross Reference 1 | Nachi NN3011K |
|---|---|
| Cross Reference 2 | URB NN3011K |
| Cross Reference 3 | FAG NN3011-AS-K-M-SP – SP precision class |
| Cross Reference 4 | NSK NN3011TBKRE44CC1P4 – P4 class, CC1 clearance |
An SKF NN 3011 K double-row cylindrical roller bearing with a 55 mm tapered bore, a 90 mm outside diameter and a 26 mm width. It is a precision spindle bearing with a machined brass cage.
NN: double-row cylindrical roller design, rollers guided by the inner ring, outer ring ribless. 3011: 30 series, 55 mm bore, 90 mm OD, 26 mm width. A: SKF internal design variant. K: 1:12 tapered bore. M: machined brass cage. P5: precision class 5, equivalent to ABEC 5. C4817: SKF special-execution code, retained as a search term.
Two rows of cylindrical rollers put a large contact length in a narrow cross-section, which gives very high radial capacity and high radial stiffness – the reason this design sits at the working end of grinding and turning spindles. The bearing is non-locating: the ribless outer ring allows the shaft to grow axially through the bearing as it warms, and axial location is provided elsewhere in the spindle by a thrust or angular contact bearing. A locating cylindrical design such as NJ or NUP behaves differently and a single-row NU has half the roller complement, so neither is a substitute.
Bore: 55 mm (2.1654 in), tapered 1:12. Outside diameter: 90 mm (3.5433 in). Width: 26 mm (1.0236 in). Number of rows: 2. Rolling elements: cylindrical rollers. Cage material: machined brass. Precision class: P5, ABEC 5. Axial location: non-locating. Closure: open.
Supplied as 1 Pc, bearing only.
The 1:12 tapered bore seats directly on a matching tapered spindle journal. This design does not use an adapter sleeve.
Closest crosses in the same 55x90x26 mm double-row tapered-bore design with a machined cage: Nachi NN3011K and URB NN3011K. FAG NN3011-AS-K-M-SP and NSK NN3011TBKRE44CC1P4 fit the same seat but are built to a higher precision class (SP and P4). The straight-bore NN 3011 is not a substitute, because it requires a cylindrical shaft seat and offers no clearance adjustment.
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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