High-Stiffness Spindle Design (VMC-137)
The cartridge-type spindle enables it to reach 6,000, 8,000, or 10,000 RPM using a belt drive assembly. Bearings at spindle nose end are well supported by a shaft sleeve and casting structure. The optimized bearing arrangement along with rigid spindle headstock reduces cutting-induced vibrations, virtually guaranteeing a better work piece surface finish.

Stiff Ballscrew Design for Greater Axial Support (VMC-137)
All three axes use ISO Class C3 precision ground pre-loaded ballscrews with pre-tensioned supports on both ends to minimize backlash and compensate the thermal induced error.

Three Chip Auger Design (VMC-137)
Instead of using a costly chip conveyor, the special three-chip auger system efficiently removes metal chips produced during machining.

Belt-Driven Spindle (VMC-137)
The spindle headstock has increased rigidity due to the wide stance design of the z-axis ways and the long surface contact between the headstock and way bars.

Massive Column Design (VMC-137)
Four over-sized ways of the machine base combined with the large column helps make the structure a very rigid unit.The column is also heavily ribbed with honeycomb shape ribs to minimize any twisting caused during machining. When in operation, maximum contact surface between the spindle headstock and Z-axis ways helps counteract heavy loads applied to the spindle structure.

Design of High Horse Power Spindle for Heavy-Duty Cutting (VMC-158) The gear-driven cartridge spindle is capable of reaching speeds of 4,000 to 6,000 RPM. There is a dramatic increase in spindle rigidity due to increased spindle bearing support. This along with a high horsepower spindle motor dramatically enhances the machine's cutting performance. In addition, each gear-driven spindle has a spindle oil cooler used to lower bearing temperature and prolong spindle life.

Pulley-Driven Spindle (VMC-158)
Three spindle alternatives of spindle are available. An enhanced headstock design allows the spindles to run up to 10.000 RPM. All spindles and pulley assemblies are dynamically balanced. A non-slip timing belt ensures the spindle will run smoothly, even at maximum speed.

X-Axis Chip Auger(VMC-158)
The chip auger design provides optimal chip disposal and maximizes table cleanness.

Gear-Driven Spindle Transmission(VMC-158)
The two-speed gear transmission allows full power utilization. All gears are made of Chrome Molybdenum alloy steel, heat treated, and precisely ground to ensure the spindle runs quietly and smoothly.Furthermore, the design of the floating tool release mechanism minimizes any pressure exerted on the spindle bearings.

Excellent Machine Base Design (VMC-158)
The machine base of the VMC-158 uses a unique enclosed circular structure.This unique design allows the base to remain free of deformation that may occur due to the heat generated during machining.This unique design also allows the machine to remain stable after extensive usage.

Calibration with Laser Interferometer was Performed and Certified by PMC
All of our machines are calibrated according to the "VDI 3441 3σ "standard. Calibration is performed for full travel length for each axis. Each measurement is taken six times to ensure the most consistent and accurate readings.

Hand Scraping
To ensure consistent high quality, each slide way is hand-scraped. Each axis saddle has Turcite material on it and a special "*" design is used along with a "Z" pattern for efficient oil troughs. There is an excellent distribution of oil to all axes, so settling time after rapid movements is eliminated, and stick-slip during cutting is minimized.

24 Tools Magazine
A rapid arm-type tool changer is driven with a precision cam, maintaining tool-changing accuracy of 0.01mm, which in turn will help maintain long-term spindle-clamping accuracy.

Pressurized Oil Distributor
Lubricating oil is evenly distributed to the sliding surfaces of the machine by using Showa oil distributors along with hard-plumbed, low maintenance oil lines.