YAMA SEIKI

MAXIMUM STRENGTH CONSTRUCTION

Major structural components have been combined into one solid platform. The low center of gravity 30° slant bed design provides the most rigid foundation possible for the headstock, turret, and tailstock.
By using Finite Element Methods ( FEM ), optimal reinforce ribbings are directly cast into the one-piece bed structure. Mechanical rigidity has been increased by more than 40% when compared to conventional designs. The GS-400 series is capable of performing super heavy-duty turning and maintain long-term super high-precision accuracy. More rigidity also means extended tool life.
Built to endure years and years of rigorous high production turning, the heavily ribbed, one-piece thermally balanced bed and casting components are of FC35-Meehanite casting ( industry standard is FC25~30 ). FC35 grade cast iron is capable of withstanding much greater stress without deforming and provides maximum vibration damping, which result in a machine that will outlast and outperform the competition.
All spindle and servo motors, including drives, are FANUC alpha i series components to ensure peak machining performance and accuracy.
X and Z axes are driven by over-sized FANUC alpha i series absolute AC servo motors, providing tremendous thrust outputs with faster acceleration and deceleration. Absolute encoder technology saves time and money by eliminating the use of limit switches, thus, eliminating referencing axes to home positions and replacing broken limit switches.
Highest accuracy and durability

C3 class hardened and precision ground ball screws ensure the highest accuracy and durability possible. Plus, pretension on all axes minimizes thermal distortion.

Extra wide hardened and ground box ways are directly formed into the machine bed and saddle during the casting process. They are precision machined and widely spaced for maximum strength. The box way design also provides the rigidity needed for heavy duty and interrupted turning applications.

Super heavy duty gear Head

The 2-speed super heavy duty gear head incorporates advance mechanical designs. Mated with a 60 HP ( Peak ) motor to provide tremendous amount of low-end torque to handle heavy material removal on large diameter parts.

Oil mist system

Both gears and bearings are lubricated and cooled by an oil mist system, which evenly and efficiently lubricates the components. This system is much more advanced and environmental compared to the traditional oil bath system by eliminating the chance of oil contaminating the bearings and the use of a oil cooler.