Tutorial: How to make a collet chuck?
Create a revolved feature with the dimensions given or according to your own dimensions.
Initiate a sketch on the selected plane and sketch a line on it
Use extrude cut option
Circular pattern this feature
Use the following to fill the parameters area.
Initiate a sketch on the plane shown
Sketch a line as done in the earlier step
Change the orientation according to the image.
Repeat the earlier procedure to extrude cut and circular patter to get the chuck.