RU Series (High Rigidity)
Structure: High Rigidity Crossed Roller / Both Rings Integral
Material: Bearing Steel (Gcr15) / SUJ2
Precision: P5, P4, P2
Rigidity: Extremely High
Mounting Type: Through-bolt / Tapped Mounting Holes
Bore Range: 50mm – 400mm
Application: Heavy robot joints, machine tool rotary axes, high-rigidity turntables
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The RU Series high-rigidity crossed roller bearings feature integral inner and outer rings without splits, delivering maximum structural stiffness. The solid ring design eliminates assembly-induced preload variation, ensuring consistent rotational accuracy under fluctuating loads. Essential for heavy robot base joints, machine tool rotary axes, and high-rigidity turntable applications.
Technical Specifications
| Bearing No. | Bore (d) mm | Outer Dia. (D) mm | Width (B) mm | Dyn. Load Cr (kN) | Stat. Load Cor (kN) | Max Speed (rpm) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| RU42 | 20 | 70 | 12 | 6.77 | 7.35 | 600 | 0.25 |
| RU66 | 35 | 95 | 15 | 10.7 | 14.2 | 500 | 0.45 |
| RU85 | 55 | 120 | 15 | 14.5 | 22.1 | 400 | 0.60 |
| RU124 | 80 | 165 | 22 | 25.3 | 42.0 | 300 | 1.60 |
| RU148 | 100 | 210 | 25 | 36.8 | 63.0 | 250 | 2.90 |
| RU178 | 115 | 240 | 28 | 44.0 | 79.5 | 200 | 3.90 |
| RU228 | 160 | 295 | 35 | 63.0 | 125 | 180 | 7.10 |
| RU297 | 210 | 380 | 40 | 105 | 215 | 150 | 14.0 |
| RU445 | 320 | 540 | 56 | 165 | 375 | 100 | 35.0 |
| RU635 | 450 | 705 | 80 | 245 | 610 | 70 | 75.0 |
