Multi-spindle machine specialist Index is preparing to demonstrate the effectiveness of its MS22C-8 modular automatic CNC turning machine for fast process capability, especially with highly complex parts. The developer indicated the Index MS22C-8 has applications ranging from automotive to medical technology, but also produces small batches efficiently and economically. As for versatility, the Index MS22C-8 can be bar-fed or loaded with chucked parts.

The MS22C-8 can be configured to operate as an 8-spindle machine, a double 4-spindle machine, dropping two complete parts at a time, or a machine with double rear-end machining. In a double four-spindle mode, the system runs as two machines working together simultaneously on one base. Every second tool station always has simultaneous access to the same tools.

Index further noted that the MS22C-8 can accomplish turning, off-center drilling and thread cutting, inclined and cross-drilling, milling, multi-edge turning, hobbing, tooth milling, deep-hole drilling or slotting. Another benefit for the user is that all standard tool holders and tool holder system interfaces can be used with a range of popular adapters (Capto, HSK, VDI, Index systems.)

Within the Index spindle drum, each of the eight spindles is assigned two cross-slides that can travel both on the X as well as on the Z-axis. Each cross-slide can be additionally equipped with a Y-axis. Up to two swiveling synchronous spindles permit simultaneous rear end machining.

“Combined with a total of up to 16 cross-slides, the eight-spindle machine is therefore a true multi-talent even for highly complex machining,” according to Index.

The speed of each of the eight liquid-cooled spindles can be controlled separately. The fluid-cooled spindle drum keeps the thermal growth in the spindle carrier to a minimum. The advantage compared to the previous air-cooling approach is the higher power density in the spindle drum and the capability of energy recovery from the heated cooling fluid.

In addition, the spindle bearing temperature can be kept at a low level, which also prolongs its service life and improves thermal stability.

The cross slides with integrated drive have a low-mass design with hydrostatic bearing support. Their low moment of inertia and resulting high dynamics facilitates outstanding acceleration in operation.

When operated as an eight-spindle machine, the drum-indexing angle from spindle to spindle is 45°: if the machine operates with two times four spindles, the drum-indexing angle is 90°. Results from double four-spindle machining; two finished parts are produced by the machine per work cycle.