Qd Taper Lock Bushing

Design principle of taper locking: among taper fitting systems, the most famous are "international" and "Morse". The former has a taper of 3.5 inches per foot, a taper angle of 15 ° 48 ', and no self-locking ability. Under the constraint of no mechanical force, the matched parts are easy to separate. The typical Morse taper is used to fix the drill or reaming cone to the axis fixture of the machine tool. Its taper is 0.625 inch in diameter per foot of length, and the cone angle is 2 ° 59 ', which can maintain self-locking ability even under lubricated conditions.

Using the taper principle to fasten the parts on the shaft is essentially to convert the axial force into radial force. This structure shall be able to produce the maximum fastening force and make the parts easy to separate at the same time. This can be achieved by making the taper take the best angle (8 °).

Briefly explain the matching force of the cone sleeve( taper bushing 2517): when the axial force forces the cone sleeve into the hub, radial forces will be generated on the interface between the shaft and the cone sleeve, the cone sleeve and the hub, and these pressures can reach 70-80n / mm2 (pH > PS). Circumferential tensile stress and circumferential compressive stress are generated on the conical surface of belt pulley and cone sleeve, which can reach 160-190 n / mm2. 

Therefore, in the matching design of pulley and cone sleeve( taper bushing 2517), the matching of pulley and cone sleeve is determined, and the shaft aperture of cone sleeve must be within the allowable maximum shaft aperture.

After cracks are found in the cone sleeve(taper bushing 2517) during use, the operators shall not handle them without authorization, but must be identified and repaired by professionals. If the crack is shallow, the surface can be processed before nondestructive testing. If there is no crack, it can be used again. If there is still crack, it will be scrapped. The specific repair size will be determined by professional technicians.

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