Civil Engineering Reference
In-Depth Information
USING CHUCKS
The three jaw chuck
The three-jaw chuck will be found to be very useful on the milling machine
table. Once clamped down you can hold all sorts of round and hexagonal
components for milling and drilling. Ideally you will turn the workpiece on the
lathe and then transfer the chuck with the work still in it to the milling machine
for working on. This ensures accuracy and concentricity.
However, this method is not usually possible when you are making a batch
of similar components. In this case you will have to do all of the turning first
and then set the chuck up on the milling machine to mill the components as a
batch.
You can use either the chuck's internal or external jaws to hold the work
or an alternative way is to use soft jaws. The soft jaws can be bored, milled
or otherwise formed to take the workpiece. Packing can be used on the hard
or soft jaws to raise the component clear of the hardened jaws for drilling or
milling.
Fig. 8.10. Chuck on milling machine table. This has standard drill jaws.
