NNU49xx Series (Double Row)
Structure: Double Row / Full Complement
Bore Type: Cylindrical
Precision: P0, P6, P5, SP
Cage: Machined Brass / Steel
Clearance: C0, C2, C3
Bore Range: 25mm – 300mm
Application: Machine tool spindles, rolling mill roll necks, printing presses
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The NNU49xx Series double-row cylindrical roller bearings feature a full complement design for maximum radial load capacity. Engineered for precision machine tool main spindles, these bearings deliver exceptional rigidity and runout accuracy. The separable outer ring with a locating rib arrangement enables straightforward assembly in demanding high-precision applications.
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) |
|---|---|---|---|---|---|---|---|
| NNU4920 | 100 | 140 | 40 | 168 | 260 | 3800 | 1.75 |
| NNU4922 | 110 | 150 | 40 | 175 | 275 | 3600 | 1.9 |
| NNU4924 | 120 | 165 | 45 | 225 | 360 | 3400 | 2.75 |
| NNU4926 | 130 | 180 | 50 | 270 | 430 | 3200 | 3.75 |
| NNU4928 | 140 | 190 | 50 | 285 | 460 | 3000 | 4.0 |
| NNU4930 | 150 | 210 | 60 | 390 | 630 | 2800 | 6.25 |
| NNU4932 | 160 | 220 | 60 | 405 | 665 | 2600 | 6.6 |
| NNU4934 | 170 | 230 | 60 | 420 | 695 | 2400 | 6.9 |
| NNU4936 | 180 | 250 | 69 | 525 | 870 | 2200 | 9.5 |
| NNU4938 | 190 | 260 | 69 | 540 | 910 | 2000 | 10.0 |
| NNU4940 | 200 | 280 | 80 | 690 | 1160 | 1800 | 14.5 |
