YCM GT-250MA

In the YCM GT-250MA the mid-size GT lathe gets a 12-station radial power turret and trades chuck size for reach. It carries an 8" chuck on an A2-6 nose, spins at 4,500 rpm, and turns parts up to ø270 mm (ø10.63 in) in diameter and 560 mm (22.05 in) in length.

Reach is the reason to pick it over the smaller live-tool model. The GT-200MA stops at 370 mm (14.57 in) of turning length; this machine adds almost 200 mm, enough for motor shafts, spindles and hydraulic rods that need milled or drilled features along their length. The tailstock quill, with 440 mm (17.32 in) of stroke, supports them.

Live tools run at 3,000 rpm with 3.57 kgf-m, more torque and less speed than on the GT-200MA. Expect comfortable drilling and keyway milling in steel, with small end mills limited by the 3,000 rpm. X travel is 230 mm, printed as 135 + 95, which gives the turret generous travel below the centerline.

Several rows carry two figures. Spindle bore is ø62 mm with ø77 mm in brackets, and the draw bar hole ø52 mm with ø66 mm in brackets; the page does not label the bracketed pair, which reads like a larger-bore spindle variant. The motor is listed at 15 kW peak in both ranges. Rapids are 20 m/min (787 ipm) in X and 24 m/min (945 ipm) in Z, and the machine weighs 6,000 kg (13,228 lb).