SL oldham coupling and oldham coupling is a kind of oldham coupling model, SL oldham coupling has two face with radial grooves of the half coupling with a tenon is at each end and middle of the slider, middle perpendicular to tenon on both ends of the slider, respectively embedded into the groove of the two and a half coupling again, a moving pair, if the amount different heart or deflection axis, moving the slider to slide in the groove, groove and the slider of the working face to add lubricant, if two different axis of heart, when high speed, owing to the eccentricity of the slider will produce a lot of centrifugal force and wear, And to the shaft and shaft to bring additional load so only applicable to low speed, the transmission of large load occasions.

The material of SL cross slider coupling is 45 steel, and the working surface needs heat treatment to improve its hardness; Q275 steel is also available at lower requirements, without heat treatment. In order to reduce the friction and wear, the oil should be injected into the oil hole of the middle disk for lubrication. Since the half coupling of SL cross slider coupling and the middle plate form a moving pair, relative rotation cannot occur, so the angular velocity of the driving shaft and driven shaft should be equal. But in the case of relative displacement between the two axes, the middle plate will produce a large centrifugal force, thus increasing the dynamic load and wear.

SL cross slider coupling is generally used for speed n<250r/min, the shaft stiffness is large, and no violent impact. Allowable compensation amount of SL cross slider coupling: axial delta x=1~2mm, radial y 0.04d(d is axial diameter), angular 40 'speed generally not exceeding 300r/min.