Key Takeaways:
Marusaku Seiko (丸作精工) has developed a high-precision gear hobbing machine built on dual hydrostatic spindles and dual direct-drive torque motors—engineered for batch production of high-accuracy gears.
A New Hydrostatic Machine Tool
Marusaku Seiko (丸作精工), drawing on three decades of precision machine-tool expertise, has developed a high-precision gear hobbing machine that applies the company's core hydrostatic technologies to gear cutting.

Two Core Technologies Combined
The machine is built on two pillars: liquid-hydrostatic bearing support, and torque-motor direct drive. Both the hob spindle (B-axis) and the workpiece table (C-axis) use hydrostatic support, while a 6-axis 4-linkage CNC with an electronic gearbox synchronizes the cutting motion.
Designed for Precision Batches
Intended for high-precision gear batch production, the design pairs non-contact, vibration-damped motion with the stiffness needed for consistent flank accuracy. Full specifications and application notes follow in this news series.