Cross slider coupling, also called slider coupling, consists of two half couplings with grooves on the end faces and a middle disc with convex teeth on both sides.Because the convex teeth can slide in the groove, the relative displacement between the two shafts during installation and operation can be compensated.

　　The Oldham coupling is composed of two shaft sleeves and a slider.As a torque transmission element, the slider is usually made of engineering plastics. Under special circumstances, other materials, such as metal materials, can be selected.The sliding block is connected with the shaft sleeves on both sides by 90° oppositely distributed clamping grooves on both sides, so as to achieve the purpose of transmitting torque.The sliding block and the shaft sleeve are matched with a slight pressure, which enables the coupling to run with zero clearance during the operation of the equipment.As the use time increases, the slider may lose its recoilless function due to wear, but the slider is not expensive and easy to replace, and it can still play its original performance after replacement.

　　Cross slide type shaft couplings are often used in common motors, and can also be used to connect servo motors on individual occasions. The relative displacement can be corrected by the sliding of the slide during use.The slider couplings of different productions on the market are not exactly the same.The material of the coupling parts can be 45 steel, and the working surface needs to be heat treated to increase its hardness; Q275 steel can also be used when the requirements are lower, without heat treatment.In order to reduce friction and wear, oil should be injected from the oil hole of the middle plate for lubrication during use.Because the half-coupling and the intermediate disc form a moving pair and cannot rotate relative to each other, the angular velocity of the driving shaft and the driven shaft should be equal.However, when working with relative displacement between the two shafts, the middle disk will generate a large centrifugal force, which will increase the dynamic load and wear.Therefore, when selecting, pay attention that its working speed should not be greater than the specified value