NK35/20 35x45x20mm Needle Roller Bearing

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.

Ключевые особенности:

1. Minimal Radial Cross-Section
   The NK35/20 is a needle roller bearing without an inner ring. Instead, the hardened shaft (with a diameter of 35 мм) 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. High Rigidity, Точность, and Speed Capability
   Unlike drawn-cup needle roller bearings (which use a stamped outer shell), the NK35/20 features a machined (solid) outer ring. 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. Low Friction, High Speed
   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. High Radial Load Capacity
   With a dynamic load rating (Кр) ranging from 26.1 kN to 31.0 kN and a static load rating (C0r) from 44.4 kN to 48.5 кН (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, shock loads, and vibration are routine.
5. High Speed
   With an oil-lubricated limiting speed of up to 12,900 RPM, the NK35/20 offers excellent high speed capability. In grease-lubricated configurations, the limiting speed is approximately 8,000 RPM. This speed performance makes the bearing suitable for high speed gearboxes, industrial spindles, and pump applications where rotational speed is a critical performance parameter.

Приложения

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

• Automotive Transmissions & Gearboxes

• Industrial Gearboxes and Reducers

• Pumps and Compressors

• Промышленное оборудование

• Heavy Equipment

• Robotics and Automation
• Engines and Connecting Rods
• Marine Equipment
• Renewable Energy