Wind turbine main shafts typically run 8–12 meters long with diameters from 800 to 1200 mm. That's a part that needs max. turning length up to 12 m. The 1600 mm swing over bed gives clearance for the flange diameter at the coupling end, while the 970 mm guideway width keeps the carriage stable under interrupted cuts from shaft keyways. In practice, a 10-meter shaft can be set up between centers with the steady rest positioned at the mid-span — the 10000 kg max workpiece weight (CW61160) handles the mass without sag. One operator we visited finishes a 9-meter, 4.5-ton shaft in two setups: rough turning at 3.15–100 rpm, then finish at 200–315 rpm with a CBN insert. The 56 feed rates from 0.1 to 12 mm/rev let him dial in the chip load per pass without guesswork.

Mining drums and ring gears often land in the 1000–1400 mm diameter range, weighing 3–5 tons. The 1640 mm swing over bed (CW61160B) or 1600 mm on the standard model clears the part without having to babysit tool clearance. What makes the CW61160 a go-to here is the 22 kW main motor (standard) with 21 forward speeds from 3.15 to 315 rpm — enough torque to take a 6 mm depth of cut in 4140 steel at 40 rpm without stalling. The 755–970 mm guideway width (depending on model) absorbs the vibration from interrupted cuts on gear teeth. For a 1300 mm diameter mining drum, we've seen shops use the 260×260 mm tool post with a 45 mm shank tool to rough out the shell in three passes, then thread the hub bore using the 44 metric thread ranges (1–120 mm pitch). The max. workpiece weight of 10,000 kg (CW61160) or 16,000 kg (C61160) means you're not limited to just drums — you can stack a gear and a shaft in one setup if the bed length permits.

Ship propeller shafts run 5–8 meters long with a flange at one end that can be 800–1200 mm in diameter. The 1250 mm swing over carriage (CW61160B) or 1210 mm (CW61160) is the key number here — the flange often exceeds the carriage swing, so you need enough clearance. The tailstock quill diameter of 220 mm with 300 mm travel and Morse No. 6 taper provides rigid support for the shaft end. For a 6-meter, 3-ton propeller shaft, the 970 mm guideway width prevents twist during heavy roughing of the flange face. The 0.1–12 mm/rev longitudinal feed range allows a finishing feed of 0.15 mm/rev for a Ra 1.6 surface finish on the bearing journals. One marine shop we work with holds ±0.02 mm over 5 meters using the CW61160's 56 feed rates and a carefully aligned steady rest. The 130 mm spindle bore also lets them pass a pull rod through for through-bore clamping on hollow shafts.

Chemical flanges require a lathe that can swing the part at low RPM without chatter. The CW61160's 3.15–315 rpm range covers the low end needed for these large diameters. At 1.5 meters diameter, running at 30–50 rpm keeps the surface speed reasonable for a carbide insert. The 21 spindle speeds (forward) give enough resolution to pick a sweet spot without belts. The max. swing over bed of 1600 mm means you can only fit flanges up to 1600 mm in diameter if you're turning across the bed — but for flanges up to 1600 mm, it's a direct fit. For larger flanges (2–4 m), you'd use a facelathe or vertical lathe, but the CW61160 can handle the intermediate sizes typical in valve and pump flanges. The 0.05–6 mm/rev cross feed allows fine control on the face grooving operation. The 22 kW motor provides stable torque at low speeds — essential for taking a 3 mm depth of cut on stainless steel flanges without vibration.