NN30xxK Series (Double Row Tapered Bore)
Structure: Double Row / Full Complement / Tapered Bore
Bore Type: Tapered (1:12)
Precision: P0, P6, P5, SP
Cage: Machined Brass / Steel
Clearance: C0, C2, C3
Bore Range: 30mm – 250mm
Application: Precision machine tool spindles, high-speed grinding, lathe main shafts
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The NN30xxK Series double-row tapered bore cylindrical roller bearings combine full complement roller capacity with a 1:12 tapered bore for direct mounting on tapered shafts. This precision bearing excels in main spindle applications on lathes, grinding machines, and milling centers, where adjustable radial clearance and exceptional rotational accuracy are essential.
Technical Specifications
| Bearing No. | Bore (d) mm | Outer Dia. (D) mm | Width (B) mm | Dyn. Load Cr (kN) | Stat. Load Cor (kN) | Ref. Speed (rpm) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| NN3008K | 40 | 68 | 21 | 45.5 | 51.5 | 13000 | 0.32 |
| NN3010K | 50 | 80 | 23 | 64.5 | 79.0 | 11000 | 0.45 |
| NN3012K | 60 | 95 | 26 | 87.0 | 110.0 | 9500 | 0.71 |
| NN3014K | 70 | 110 | 30 | 118.0 | 150.0 | 8500 | 1.1 |
| NN3016K | 80 | 125 | 34 | 152.0 | 195.0 | 7500 | 1.6 |
| NN3018K | 90 | 140 | 37 | 182.0 | 240.0 | 6700 | 2.1 |
| NN3020K | 100 | 150 | 37 | 202.0 | 280.0 | 6300 | 2.4 |
| NN3022K | 110 | 170 | 45 | 240.0 | 335.0 | 5600 | 3.7 |
| NN3024K | 120 | 180 | 46 | 270.0 | 390.0 | 5300 | 4.3 |
| NN3026K | 130 | 200 | 52 | 340.0 | 475.0 | 4800 | 6.2 |
| NN3028K | 140 | 210 | 53 | 375.0 | 545.0 | 4500 | 7.1 |
| NN3030K | 150 | 225 | 56 | 415.0 | 620.0 | 4300 | 8.8 |
