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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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1 in stock
Double row cylindrical roller bearing, 40 x 68 x 21 mm, 1:12 tapered bore and machined brass cage. SKF NN 30 super-precision series, supplied as two pieces.
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| MFR / Brand | SKF |
|---|---|
| MPN | NN3008AKMC481 |
| Model | NN 3008 A K M P5 C481 |
| Bearing Type | Cylindrical Roller Bearing, Open |
| ID | 40 mm |
| OD | 68 mm |
| Width | 21 mm |
| Material | Bearing Steel |
|---|---|
| Series | NN 30 |
| Base Number | NN 3008 |
| Industry Terms | Machine tool spindle bearing; precision double row cylindrical roller bearing; NN series spindle bearing; tapered bore cylindrical roller bearing |
| Common Misspellings | NN3008AKM; NN 3008 AKMC481; NN3008-AKM-C481; NN3008 AKM C481; NN-3008-AKM |
| Application Types | Machine tool spindles; grinding spindles; lathe headstocks; milling heads; boring mills; precision gearboxes |
| Overall Width | 21 mm |
| Mpn Variants | NN3008AKMC481; NN-3008-AKMC/C481; NN3008AKMC/C481; NN 3008 A K M C481; NN3008K; NN 3008 |
| Cage Type | Machined |
| Dynamic Load Rating | 42,900 N |
| Static Load Rating | 56,000 N |
| Rolling Elements | Cylindrical Roller |
| Cage Material | Machined brass |
| Number Of Rows | 2 |
| Bore Type | Tapered 1:12 |
| Snap Ring Included | No |
| Lubricant | Grease or oil |
| Harmonization Code | 8482.50.00.00 |
| Bearing Material | Bearing steel |
| Cross Reference 1 | FAG NN3008-AS-K-M-SP |
|---|---|
| Cross Reference 2 | NSK NN3008K |
| Cross Reference 3 | NTN NN3008K |
| Cross Reference 4 | Koyo NN3008K |
| Cross Reference 5 | NACHI NN3008K |
| Cross Reference 6 | SKF NN 3008 KTN9/SP |
A double row cylindrical roller bearing from the SKF NN 30 super-precision series, made for machine tool spindles and other assemblies that need high radial stiffness at speed. Bore Diameter: 40 mm. Outside Diameter: 68 mm. Overall Width: 21 mm. Number Of Rows: 2. Rolling Elements: Cylindrical Roller. Bore Type: Tapered 1:12. Cage Material: Machined brass. Cage Type: Machined. Closure Type: Open. Bearing Material: Bearing steel. Series: NN 30. Base Number: NN 3008. Harmonization Code: 8482.50.00.00.
NN — double row cylindrical roller bearing. Two rows of rollers running on one inner ring, carrying radial load. Not an angular contact bearing and not a thrust bearing.
3008 — NN 30 dimension series with bore code 08, giving the 40 x 68 x 21 mm envelope.
K — tapered bore, taper 1:12. The bore mounts directly on a tapered spindle journal, with no adapter sleeve.
M — machined brass cage.
Inner Ring Flanges: 3. Outer Ring Flanges: 0. Separable: Yes. The flangeless outer ring allows axial shaft movement in both directions while the bearing locates the shaft radially. The outer ring separates from the inner ring and roller assembly, so each ring takes its own interference fit.
Dynamic Load Rating: 42,900 N. Static Load Rating: 56,000 N. Two rows of cylindrical rollers make line contact across the full 21 mm width, for high radial capacity and rigidity.
Bore Diameter: 40 mm, at the small end of the 1:12 taper. Outside Diameter: 68 mm. Overall Width: 21 mm. Bore Type: Tapered 1:12. Closure Type: Open. Lubricant: Grease or oil. Snap Ring Included: No.
Unit Quantity: 2 Pcs. Each piece is a complete bearing — inner ring with rollers and cage, plus its outer ring.
NN 30 boundary dimensions are standardised across makers. Cross-Reference 1: FAG NN3008-AS-K-M-SP. Cross-Reference 2: NSK NN3008K. Cross-Reference 3: NTN NN3008K. Cross-Reference 4: Koyo NN3008K. Cross-Reference 5: NACHI NN3008K. Cross-Reference 6: SKF NN 3008 KTN9/SP, the current-production execution at this size, same envelope with a polyamide cage.
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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.
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