PURPOSE: A one-touch chamfering degree regulating apparatus of a chamfering machine is provided to enable accurate control by fastening a position setting pin into the fixing grooves of a chamfering degree regulating tool when the chamfering degree regulating tool rotated is released. CONSTITUTION: A one-touch chamfering degree regulating apparatus of a chamfering machine comprises an chamfering machine body(10), a movable spline shaft(20), a chamfering degree regulating tool(30), a spring-housing(40), an elastic spring(50), fixing grooves(60), a position setting pin(70), a sleeve shaft(80) and a cutter shaft(90). The movable spline shaft is connected to the spline shaft joint of the body to move up and down. The chamfering degree regulating tool slides up and down while wrapping the outside of the movable spline shaft. The elastic spring is located between the inner surface of the spring-housing and a guide groove of the chamfering degree regulating tool. The fixing grooves are formed on the bottom surface and along the circumference of the chamfering degree regulating tool. The position setting pin is selectively inserted in the fixing grooves to fix the position of the chamfering degree regulating tool and keep locking. The cutter shaft moves up and down along with the sleeve shaft.
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