4.1 Correctly Load and Unload Parts-Basic Lathe Operator

The most common way to hold a workpiece in a CNC lathe is:

A chuck

The gripping jaws on a chuck are used to:

Hold the part

When the jaws are extended outward, away from the center of the chuck, we call this the:

Unclamped position

To load the workpiece, the operator will push it against the:

Back face of the jaw

To be sure that the part is securely clamped, the indicator lines on the chuck should be:

In the middle of the box

The force that the jaws exert to hold the part is controlled by:

An adjustable dial that controls hydraulic pressure

To tighten or loosen a manual chuck, you use a:

Chuck key

Soft jaws are usually made out of:

Soft steel or aluminum

The machinist setting up the job may machine a pocket into the soft jaws to:

Fit the shape of the part the operator wants to hold

Hard jaws are often used to:

Hold large pieces of raw material that require extensive machining

A collet chuck is primarily used to hold:

Round bars

Before loading a part, it is very important to make sure that there are no:

Debris or chips on the chuck jaw surfaces

A final check after loading a part into the chuck is to:

Slowly rotate the chuck by hand and check for gaps between the part and the face of the chuck

When running the first part, we recommend you:

Place one thumb on Cycle Start, and one thumb on Feed Hold

Periodically, throughout the workday, you should clear chip build-up from around the chuck, the turret, and the waycovers to:

Make sure chips consistently go in the bin

When using a manual chuck, the greatest danger is:

Starting the machine with the chuck key still in the chuck

The number one rule with a manual chuck is to NEVER:

Leave the chuck key in the chuck