NK35/20 35x45x20mm 針状ころ軸受

NK35/20 Needle Roller Bearing – Maximum Load Capacity in Minimal Radial Space

The NK35/20 Needle Roller Bearing is a single-row caged needle roller bearing engineered specifically for applications where radial space is minimal but high radial load capacity and operational rigidity are non-negotiable.

主な特長:

1. Minimal Radial Cross-Section
   The NK35/20 is a needle roller bearing without an inner ring. その代わり, the hardened shaft (with a diameter of 35 mm) directly serves as the inner raceway. The elimination of the inner ring radically reduces the bearing’s radial cross-section. For applications where radial space is at an absolute premium, the NK35/20 opens design possibilities that would be impossible with standard bearings.

2. 高剛性, 精度, and Speed Capability
   Unlike drawn-cup needle roller bearings (which use a stamped outer shell), the NK35/20 features a machined (solid) 外輪. Machined rings are significantly more rigid than drawn-cup designs. This enhanced rigidity allows the NK35/20 to accommodate higher loads and higher speeds while maintaining tighter running accuracy. The machined outer ring is precision-ground on both the outer raceway and the outer cylindrical surface, ensuring consistent, reliable performance even under demanding operating conditions.

3. 低摩擦, 高速
   The NK35/20 is available in multiple cage configurations. The TV suffix designates a PA66 plastic cage (glass-fiber reinforced polyamide), which offers a combination of low friction, excellent centrifugal-force characteristics, high durability, and good chemical resistance to most industrial lubricants. The PA66 plastic cage also contributes to quieter bearing operation compared to full-complement designs and reduces the risk of roller skewing at high speeds.

4. 高いラジアル荷重容量
   With a dynamic load rating (Cr) ranging from 26.1 kN to 31.0 kN and a static load rating (C0r) from 44.4 kN to 48.5 kN (depending on manufacturer), the NK35/20 delivers an exceptionally high radial load capacity for its compact size. These load ratings make the bearing suitable for demanding applications where heavy radial loads, 衝撃荷重, and vibration are routine.
5. 高速
   With an oil-lubricated limiting speed of up to 12,900 回転数, the NK35/20 offers excellent high speed capability. In grease-lubricated configurations, the limiting speed is approximately 8,000 回転数. This speed performance makes the bearing suitable for high speed gearboxes, industrial spindles, and pump applications where rotational speed is a critical performance parameter.

アプリケーション

The NK35/20 needle roller bearing is a versatile component found across numerous high-demand industries:

• 自動車用トランスミッション & ギアボックス

• 産業用ギアボックスおよび減速機

• ポンプとコンプレッサー

• 産業機械

• 重機

• ロボティクスとオートメーション
• Engines and Connecting Rods
• Marine Equipment
• 再生可能エネルギー