What Is the Morse Taper?

Morse taper is an international standard for taper, used for static fit for precise positioning. Due to the small taper, a certain torque can be transmitted using the principle of friction, and because of the taper fit, it can be easily disassembled. Within a certain range of the same taper, the workpiece can be disassembled and assembled freely, and at the same time, it will not affect the use of the work. For example, the taper shank drill for drilling. Will affect the center position of the drill.

Morse taper is a

Morse taper, there are seven numbers of 0,1,2,3,4,5,6, the taper value has a certain change, the nominal diameter of each model is 9.045, 12.065, 17.78, 23.825, 31.267, 44.399, 63.348. Mainly used for various

Morse taper is divided into long cone and short cone.Long cone is mostly used for the spindle hole of active machine tools. Short cone is used for machine tool accessories and machine tool connection holes. These models are shortened according to Morse long cones 1, 2 and 3.For example, B10 and B12 are the two ends of Morse long cones 1. Tapers, such as the commonly used drill chucks 1-13 mm, usually use B16 short taper holes ^[2]

Metric taper, marked with large end diameter, is mainly used for larger spindle taper, tool sleeve, tool holder.

number	Taper C	Outer cone diameter
0	1: 19.212	9.045
1	1: 20.047	12.065
2	1: 20.020	17.78
3	1: 19.922	23.825
4	1: 19.254	31.267
5	1: 19.002	44.399
6	1: 19.180	63.348

The relationship between the taper C and the cone angle is: C = 2Xtg ( / 2) ^[1]

Invented by the 19th-century American mechanic Stephen A. Morse to solve the problem of twist drill clamping (Moore is also the inventor of the world's first commercial twist drill (1864)). Immediately promoted to the American standard, and developed into a global standard ^[1] .