|Feather Key Joints - Course: Techniques of Fitting and Assembling Component Parts to Produce Simple Units. Trainees' Handbook of Lessons|
Feather key joints detachable joints positively connecting parts, which have to do rotar motions, by fastening devices - feather keys.
1 key, 2 shaft, 3 hub
Feather key joints are made in order to
- connect parts of machines which have to carry out a true rotary movement;
- to additionally secure the position of machine parts connected by clamping and taper connections, so that they are able to carry out a true rotary movement;
- to connect machine parts with shafts in such a way that, in addition to a rotating movement, they are also able to do an axial reciprocating movement.
Special advantages of the feather key joints
- The true running of the parts is guaranteed;
- The stability of the joint is guaranteed even with the transmission of higher rotary power.
- The joint does not stand frequently changing discontinuous stress.
If shafts and hubs are shaped in a special way, the connection of rotating parts is guaranteed by this special shape itself. Additional feather keys are then no more required. Such shafts are called profile shafts; the hub is shaped corresponding to the profile of the shaft.