When was the last time you checked your double arm?

“The machine’s going to have no idea – it’s still going to attempt to do a tool change.”

In this masterclass, Alan Hofstetter of Phillips Corporation breaks down one of the most overlooked maintenance checks on a side-mount tool changer: the double arm.

From bent arms and worn keyways to spring failure and incorrect shim gaps, small issues can quickly lead to damaged pockets, spindle taper wear, and even tools being flung from the machine. If you’re not inspecting this assembly regularly, you could be causing serious long-term damage without even knowing it.