KEYS AND KEYWAYS Union College（键和键槽,联合学院）.pdf

KEYS AND KEYWAYS KEYS AND KEYWAYS Keys are used to transmit torque from a rotating machine element to the shaft Union College MER419: Mechanical System Dept. of ME Design KEYS AND KEYWAYS KEYS AND KEYWAYS Types of keys Keys and Keyways are given in ANSI B17.1-1967.Standard contains tables of recommended key sizes versus shaft diameter. Union College MER419: Mechanical System Dept. of ME Design SQUARE RECTANGULAR KEYS SQUARE RECTANGULAR KEYS Standard contains tables of recommended key sizes versus shaft diameter. -The hub is slightly larger than the shaft and key to allow it to slide over the shaft during assembly. -The set screw is used to take up the slack. -The resulting friction is used to provide resistance to axial motion. Thread adhesive may be required to ensure that vibration doesn.t cause the set screw to loosen. Union College MER419: Mechanical System Dept. of ME Design TAPERED KEYS TAPERED KEYS Designed to be inserted from the end of the shaft after the hub is in position. The taper will impart a compressive contact pressure between