2005 Mazak QTN-250M CNC Lathe

The 2005 Mazak QTN-250M is a ten-inch-chuck turning centre that offers 26.6-inch swing and 15-inch cutting diameter over a 39.9-inch Z stroke, giving job-shops big-bore capacity inside a 137- by 75-inch bay. A 4-inch bar slips through the 3.5-inch spindle bore, and the built-in 35 HP motor drives the A2-8 nose to 4000 RPM or 750 foot-pound torque at 350 RPM for alloy roughing. Mazatrol 640T Nexus conversational control speeds setup; X 9.1-inch and Z 42.7-inch travels return at 1181 IPM to slash idle time while C-axis indexing to 0.001 degree positions the work for 4500 RPM live-tool milling powered by a 7.5 HP motor. Tailstock steadies shafts to 41.3 inch centres, flood coolant clears chips, a roof-mounted mist collector keeps vapour low, and the chip conveyor ejects swarf for lights-out runs.

Contrast this machine with the QTN-200M that ships with an eight-inch chuck, 2.5-inch bar, 30 HP spindle and 20.25-inch Z stroke: the 250M widens bar capacity to 4 inch, boosts power to 35 HP and lengthens stroke by 22.45 inch while sharing identical Mazatrol code—making the 250M the production-grade sibling and the 200M the space-savvy option.