2002 Okuma Impact LU15-M CNC Turning Center

The 2002 Okuma Impact LU15-M is a 20.87-in-swing, 6-in-chuck mill-turn lathe that machines 23.62 in shafts between centers while a 25 hp spindle peaks at 4500 RPM for aluminum flanges or 104 ft-lb at 1200 RPM for alloy steel couplings. A 3.15 in bore lets 2.44 in bar run through an A2-8 nose, and twin BMT turrets deliver 20 live-tool positions—twelve upper, eight lower—for cross-drilling and end-milling at up to 5000 RPM. X strokes measure 10.24 in on the upper slide and 5.51 in on the lower; Z travels reach 25.20 in and 24.21 in, with rapids of 590 IPM in X and 787 IPM in Z to shave seconds off every cycle. OSP-100 CN control overlays IGF conversational cycles on full G-code, while a hydraulic steady rest on the lower turret locks slender shafts against chatter. Flood coolant, chip conveyor and tailstock round out a 156 × 83 in footprint that weighs 19000 lb, so rigging is straightforward for midsize shops.

Compared with the LU15 turn-only variant—no live tools, 3600 RPM spindle and eight-station lower turret—the LU15-M adds 5000 RPM milling, twelve upper positions and raises spindle speed to 4500 RPM, yet both share the same slant-bed casting, meaning existing jaws and bar feeds transfer without modification