Eight Spindles for Complex Parts

Index’s MS22C-8 from its Multiline series is a modular eight-spindle machine that is especially useful for machining highly complex parts.

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Index’s MS22C-8 from its Multiline series is a modular eight-spindle machine that is especially useful for machining highly complex parts. The multi-spindle automatic lathe has many applications throughout industries ranging from automotive to medical technology. It also is designed to produce small batches efficiently and economically. The versatile machine can be bar fed or loaded with chucked parts.
 
The machine can be configured to operate as an eight-spindle machine; a double four-spindle machine, dropping two complete parts at a time; or a machine with double rear end machining.
It 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 toolholder system interfaces can be used with a range of popular adapters (Capto, HSK, VDI, INDEX systems).
 
Each of the eight spindles, arranged in the spindle drum, are assigned two cross-slides, which can travel both on the X as well as on the Z axis. Each cross-slide can be additionally equipped with a Y axis.
 
As many as two swiveling synchronous spindles permit simultaneous rear end machining and can have as many as 16 cross-slides.
 
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 with the previous air-cooling approach is the high-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.

The machine in double four-spindle mode actually runs as two machines working with one another simultaneously on a single base. Every second tool station always has simultaneous access to the same tools.