USED MORI SEIKI MS-850G

Mori Seiki MS-850G Heavy Duty Gap Bed Engine Lathe17" / 25" x 33" Capacity | Precision Toolroom Grade | Made in JapanOverviewThe Mori Seiki MS-850G is widely regarded by master machinists as the finest manual engine lathe ever produced. Engineered for extreme rigidity and "silk-smooth" operation, the MS-850G is a heavy-duty powerhouse that holds tolerances far better than modern light-duty machines.This is a Gap Bed model, providing a standard 17" swing for precision work, with the ability to remove the gap for a massive 25" swing on large-diameter flanges and repair work. At approximately 4,500 lbs, it offers the vibration dampening required for superior surface finishes in the toughest materials.Technical SpecificationsSwing Over Bed: 17.13"Swing In Gap: 25.5" (Removable Gap)Distance Between Centers: 33.46"Swing Over Cross Slide: 9.84"Spindle Bore: 2.05" (52 mm)Spindle Speeds (12): 32 – 1,800 RPMSpindle Nose: A1-6 (Precision Ground)Threading (Inch): 4 – 80 TPI (40 changes)Threading (Metric): 0.5 – 7.0 mmFeeds (40): 0.0018" – 0.025" IPRMain Motor: 5 HP, 220V/440V, 3-PhaseBed Width: 13.75" (Induction Hardened & Ground)Machine Weight: Approx. 4,500 lbsKey Features & BenefitsLegendary Japanese Build: Mori Seiki lathes are known for superior metallurgy. The hardened bed ways and precision-ground gears in the headstock ensure a lifetime of service.Geared Headstock: 12-speed selection with high-torque delivery, running in a continuous oil bath for quiet, cool operation.Foot Treadle Brake: Includes an integrated mechanical foot brake for immediate spindle stopping—essential for safety and high-efficiency threading operations.Large Spindle Through-Hole: The 2-inch bore allows for long shafting and bar work to pass through the headstock with ease.Massive Carriage & Tailstock: The oversized carriage provides maximum stability during heavy cuts, while the #4 Morse Taper tailstock ensures rigid support for long-workpiece drilling and centers.Condition & Investment ValueThe Mori Seiki MS series is considered "investment-grade" machinery. Unlike newer imports that lose value instantly, a well-maintained MS-850G is a stable asset that continues to command high prices in the secondary market due to the lack of modern equivalents with this level of mass.Dealer Note: If you are looking for a machine that bridges the gap between a toolroom lathe and a production powerhouse, the MS-850G is the industry standard. It is the "forever lathe" for any serious shop.