The Complete Guide to Becoming A Multiple Machine Tool Setter, Operator, and Tender, Metal and Plastic

Chapter 1: What Does a Multiple Machine Tool Setter, Operator, and Tender, Metal and Plastic Actually Do?

Let's start by clearing up what the title actually means, because it's a mouthful. A "multiple machine tool setter, operator, and tender" is a person who runs more than one machine that cuts, shapes, or finishes metal and plastic parts. The "setter" part means you configure the machine to do its job. The "operator" part means you run it when it's working. The "tender" part means you watch it, feed it raw material, and deal with problems when they arise. In many factories, you'll do all three of these things, often in the same shift, on two or three different machines at once.

You'll hear this job referred to by other names, too. Some factories call it "CNC operator," which stands for Computer Numerical Control. Others say "machine operator," "production machinist," or simply "machinist" — though a full machinist usually does more complex setup and programming than you'll be doing early on. The formal government category for this occupation is exactly what's in the title, which is why you see it on job postings and labor statistics. Whatever it's called, the core of the work is the same: you're responsible for making sure a machine produces parts that meet a specific size, shape, and quality standard, over and over again, for your entire shift.

The machines you'll actually run

The most common machines you'll work with are CNC lathes and CNC mills. A