The Johnford SDMC-11000-2H is a heavy-duty, high-performance Sliding Double-Column (Portal) Machining Center engineered by Roundtop Machinery Industries. This massive gantry-type machine is built for the extreme rigors of large-scale, high-precision applications like aerospace landing gear manufacturing. Featuring a moving gantry and a fixed-table layout, it provides virtually unlimited table load capacity and structural integrity for handling the heaviest workpieces.

Key Features

• Twin Ram Dual Spindles (2H): Equipped with a dual-path control system and twin milling heads to machine two parts simultaneously, doubling productivity.
• Massive Work Envelope: Features an extra-long 11,000 mm X-axis travel alongside a 3,200 mm Y-axis and 1,400 mm Z-axis.
• Twin Working Zones: 11,000 mm table length is separated by a manual divider. When doing the cutting job on one side, one can do the part loading/unloading on the other side. And then vice versa. This type of machine setup greatly reduces the cycle time.
• Exceptional Rigidity: Built with heavy-duty Meehanite cast iron structures and Turcite-B coated box ways to provide maximum vibration damping and long-term geometric accuracy.
• Advanced Multi-Axis Capabilities: Supports flexible head configurations, including standard 3-axis, 5-face automatic index heads, and continuous NC 2-axis heads for simultaneous 5-axis machining.
• High-Precision Control: Outfitted with high-precision closed-loop linear scales on the X-axis as standard to eliminate structural thermal deformation over long distances.

Efficient Chip & Contaminant Management: Utilizes dual screw conveyors paired with a caterpillar chain-type chip conveyor to rapidly clear massive volumes of chips from the working area.

The Johnford ST Series is a premier line of high-performance, heavy-duty slant-bed CNC horizontal turning centers engineered by Roundtop Machinery Industries. Designed specifically for large-diameter turning, long-shaft machining, and aggressive metal removal on oversized components, this series serves demanding industries like energy, aerospace landing gear, and heavy infrastructure equipment. The ST platform provides industry-leading mass, structural rigidity, and thermal stability to handle the heaviest cylindrical parts with consistent accuracy.

Key Features

• Rigid Meehanite Casting: Constructed with a massive, one-piece 60° torque-tube slant bed cast from premium Meehanite iron, maximizing structural rigidity while optimizing chip flow and heat dissipation. [1, 4, 5]
• True 60° Alignment Plane: The headstock, tailstock, and saddle are all aligned on the exact same 60° plane. This minimizes thermal expansion growth and maintains geometric precision under heavy loads.
• High-Torque Gearbox Spindles: Equipped with robust 2-speed or 4-speed gear-driven spindles paired with high-horsepower motors, delivering the brutal low-end torque required for deep, stable cuts on tough alloys.
• Heavy-Duty Square Box Ways: All axes feature wide, induction-hardened and precision-ground square box ways. Mating surfaces are hand-scraped and Turcite-B coated for vibration damping and superior friction properties.
• Massive Work Capacity: Offers an extensive range of configurations with swing-over-beds up to 1,200 mm and distances between centers spanning all the way up to 10 meters.
• Versatile Configurations (Y-Axis & Sub-Spindle): Available with active multi-tasking C-axis turning, live tool turrets, high-stroke Y-axis capabilities, and programmable sub-spindles or twin-turret variations to finish complex parts in a single setup.