The hidden ROI of eliminating jaw changes in machine tending
Jaw changes feel like a few harmless minutes. Multiplied across a year of changeovers, they are one of the largest invisible costs in a robot cell — and the easiest to remove.
By Servo-Flex Engineering, Application Engineering
Ask an integrator where their cell loses time and they'll point to cycle time, robot speed, or the machine. Rarely do they point to the gripper. Yet in high-mix machine tending, the jaw change is often the single biggest source of lost, unbilled hours — precisely because it hides in plain sight.
Why jaw changes are so expensive
A jaw change rarely takes "just a few minutes." In practice it means:
- stopping the cell and the machine it feeds;
- unbolting and re-bolting jaws;
- re-teaching or verifying the grip position;
- running test parts and adjusting;
- documenting the new setup.
Call it fifteen minutes, conservatively. Now multiply.
A cell that changes part family ten times a week, at fifteen minutes each, loses 2.5 hours every week — about 120 hours a year. At a modest cell value of €120 per hour, that is roughly €14,000 a year of capacity quietly disappearing into setup.
The second, invisible cost
Time is only half of it. Every manual jaw change is also a risk event: a mis-set jaw, a wrong force, a dropped part, a scrapped run. These don't show up on a changeover stopwatch, but they show up in scrap rates and in the confidence to run a cell unattended.
How flexible gripping removes the cost
A flexible servo-electric gripper like the Servo-Flex Flexi 150 grips a wide diameter range — 6 to 120 mm — with one jaw configuration. Switching part families becomes a program selection, not a mechanical operation:
- no stop to swap jaws;
- no re-teach;
- no test-and-adjust loop;
- no setup-induced scrap.
The 120 hours don't move to another task — they convert directly into billable machine time.
A simple way to size your own number
You can estimate the saving in under a minute:
- Changeovers per week × minutes per changeover ÷ 60 = hours lost per week.
- × operating weeks per year = hours lost per year.
- × your cell's hourly value = annual cost of jaw changes.
Our ROI calculator does exactly this, and also shows the payload you recover by moving to a 2–4 kg gripper.
The takeaway
Jaw changes are the rare problem that is both expensive and easy to remove. If your cell runs more than a handful of part families, eliminating them is usually the fastest ROI available in the whole installation — faster than a new robot, and far cheaper.
Want the number for your specific cell? Book a demo and we'll model it with you.