Ductor
Ductor turns up in 2 fields: electrotechnology, printing. Here is what it means to the people in each one.
Ductor in electrotechnology
Shop name for a micro-ohmmeter used to measure very low contact and joint resistances.
Ductor comes from a trade name and is used generically for a low-resistance ohmmeter that injects a DC test current, often 10 to 200 A, and measures the voltage drop with separate sense leads in a four-wire Kelvin arrangement. It reads in micro-ohms and is used on breaker main contacts, busbar joints, cable lugs and earth connections, where a few tens of extra micro-ohms means a hot joint at full load.
"Ductor the main contacts on breaker 4, if it's still over 80 micro-ohms we pull it for a contact dressing."
Ductor in printing
A roller that transfers ink or water from a fountain to the distribution rollers.
A specialized oscillating roller in a printing press that swings back and forth between the fountain roller and the main distribution train. It picks up a measured stripe of ink or dampening solution and passes it into the system. Adjusting its dwell time controls the exact volume of ink reaching the printing plate.
"The ductor roller is bouncing too much at high speed and throwing ink across the guard."