Product introduction

Mach

Machined needle roller bearings are a type of needle roller bearing manufactured by precision machining.

Structural features

Needle roller：The needle roller is machined with high precision and has strict dimensional tolerances and surface finish. Its shape is a slender cylinder with a large ratio of length to diameter to achieve a large load-bearing capacity in a limited space.

Inner and outer rings：The inner and outer rings are usually made of high-quality steel, and are precisely machined to ensure the dimensional and geometric accuracy of their inner diameter, outer diameter and raceway. The surface of the raceway is specially treated to improve its hardness and wear resistance, ensuring smooth rolling of the needle in the raceway.

Cage：The cage is designed with suitable materials and structures, and is precisely formed by machining process. Its function is to evenly separate the needles, prevent the needles from colliding and squeezing each other, and guide the needles to roll on the correct track. The design of the cage needs to take into account the high-speed operation and load-bearing capacity requirements of the bearing to ensure its stability and reliability.

Working principle

Carrying capacity：Machined needle roller bearings mainly bear radial loads. When the bearing is subjected to an external radial force, the needle roller rolls in the raceway and bears the load through rolling friction. Due to the linear contact between the needle roller and the raceway, the contact area is small, so under the same load, the contact stress is relatively large. However, due to the large number of needle rollers, the load can be dispersed, enabling the bearing to bear higher radial loads.

Rotation accuracy：During operation, the high-precision manufacturing of the machined needle roller bearing ensures its rotation accuracy. Under the guidance of the cage, the needle roller rolls smoothly along the raceways of the inner and outer rings, reducing the generation of vibration and noise. At the same time, the high-precision raceway and needle roller dimensional tolerance control enable the bearing to maintain a small radial jump and axial movement when rotating at high speed, meeting the working requirements of various precision equipment.

Lubrication and sealing：In order to ensure the normal operation of the bearing and prolong the service life, the machined needle roller bearing needs proper lubrication and sealing. Lubrication can reduce the coefficient of friction between the needle roller and the raceway, reduce the generation of heat and wear. The sealing device can prevent dust, impurities and moisture from entering the inside of the bearing, affecting the performance and life of the bearing.

Application field

Automotive field：It is widely used in key parts such as transmissions, engines, and steering systems in automobiles. For example, in the synchronizer and gear shaft support of automobile transmissions, machined needle roller bearings can withstand the radial loads generated by high-speed gear shifts and large torque transmission, ensuring the smooth operation and reliability of the transmission. In the camshaft and crankshaft support of engines, machined needle roller bearings can adapt to high-speed rotation and complex working environments, providing stable support and precise motion control.

Industrial machinery：In various industrial machinery and equipment, such as machine tools, printing machinery, textile machinery, food processing machinery, etc., machined needle roller bearings are one of the key components. In the spindle system of machine tools, machined needle roller bearings can withstand the radial force generated by high-speed cutting and heavy-load processing, ensuring the machining accuracy and efficiency of machine tools. In printing machinery and textile machinery, machined needle roller bearings are used to support high-speed rotating rollers and drive shafts, ensuring stable operation of equipment and high-quality printing or textile effects.

Aerospace：In aerospace equipment, the quality, precision and reliability of components are extremely demanding. Machined needle roller bearings are widely used in key parts of aircraft engines, landing gear, flight control systems, etc. due to their excellent performance and high-precision manufacturing. In engines, machined needle roller bearings can withstand the harsh working environment of high temperature, high pressure and high-speed rotation, ensuring the reliable operation of the engine. In landing gear systems, machined needle roller bearings can withstand the huge impact loads of aircraft landing and taxiing, ensuring the safety and stability of the landing gear.