6. (a) Name any three of the labelled parts on the lathe below - Leaving Cert Engineering - Question 6 - 2022

Cutting fluid is used when machining metals to enhance tool life, reduce heat buildup, and improve surface finish. It also helps to flush away chips from the cutting zone, ensuring smoother operations.

Spindle speed refers to the rotational speed at which the chuck turns, measured in revolutions per minute (RPM). This speed can be adjusted using the gears on the lathe, allowing for greater control over the machining process.

Depth of cut is the measure of how deep the cutting tool penetrates into the workpiece when cutting. It directly influences the amount of material removed and the machining efficiency.

Feed denotes the distance the cutting tool moves into the material with each revolution of the workpiece. It is crucial for determining the rate of material removal and the surface quality of the finished product.

The lathe process shown is known as 'Parting off.'

To carry out the parting off process:

1. Secure the parting tool into the tool post, ensuring it is square to the workpiece.
2. Align the tool to the outside of the line where cutting is desired.
3. Select the appropriate cutting speed and direction on the lathe.
4. Engage the tool into the turning workpiece and maintain a continuous motion to complete the cut.

Two other processes that can be carried out on a lathe include:

1. Facing off
2. Taper turning