Downtime patterns that usually mean the equipment — not the operator — is the bottleneck, and how to build the case for replacing a line.
1. Unplanned downtime is creeping up
A healthy line loses a few hours a month to planned maintenance. Once unplanned stops pass 4% of running time, the cost of lost output usually exceeds the monthly instalment on a replacement machine. Track stops for one quarter before deciding — a single bad month proves nothing.
2. Spare parts take weeks to arrive
When a model leaves production, its parts follow within a few years. If your maintenance team keeps a private stock of scavenged components, the line is already running on borrowed time.
3. Output quality varies by shift
Worn guides, tired spindles and drifting sensors show up as tolerance variation that operators quietly compensate for. When the night shift needs different settings than the morning shift to hit the same spec, the machine is telling you something.
4. Energy cost per unit keeps rising
Older drives run at fixed speed regardless of load. A modern inverter-driven equivalent typically cuts consumption by 20–30% for the same output, which on a two-shift operation often covers a meaningful share of the investment.
5. The line cannot take on new work
The clearest sign is commercial, not technical: you turn down orders because the tolerance, material or throughput is out of reach. At that point the machine is capping revenue, and the comparison is no longer old versus new — it is with the order book you are declining.
What to do next
Bring three numbers to the conversation: unplanned downtime hours, energy cost per unit, and the value of work refused in the last six months. Our engineers use those to size a replacement and return a configuration and lead time within 24 working hours.
