Multi-Spindle Automatic Lathe

June 13, 2018
INDEX's automatic lathe machine offers directed part discharge through linear handling.

With 8 CNC spindles, two back-working spindles for rear-end machining, deploying up to 18 CNC slides (X and Z) and additional Y axes if required, the MS40-8 machine is ideal for high-volume precision work in the automotive, fastener, connector, and aerospace industries.


The MS40-8 handles bar stock through a bar loader, the INDEX MBL40-8, or chuck parts. The 110-mm chuck allows machining of pre-formed, forged or extruded parts of up to 80 mm. For simple parts, the machine can be used as a double 4-spindle machine, reducing cycle times in half.


The heart of the INDEX MS40C-8 multi-spindle automatic lathe is the compact spindle drum with eight fluid-cooled motorized spindles with synchronized technology (max 7,000 rpm, 24 kW, 57 Nm). They are characterized by infinitely variable speed control, high torque, low size and no maintenance requirements.


With the increased number of main spindles and tool carriers, the MS40C-8 can completely machine even very complex parts in one operation. Up to two pivoting synchronized spindles are each able to work on up to seven rear end machining tools: four of them can be live. A new feature is that two rear end machining tools can work simultaneously on the workpiece.


A significant highlight of the machine is its versatile economic usability, including for simple workpieces. For example, if components need to be cut with only a small number of tools, it can be used as a highly productive double four-spindle machine. If the user makes this choice, he has practically two four-spindle machines available of which each provides a synchronized spindle for rear end machining. Each cycle finally outputs two finish-machined components from the machine.


Since each spindle is independently programmable, it is possible to machine troublesome materials that up to now were hardly suitable for multi-spindle machines. Speed changes are possible also during drum indexing, resulting in no additional downtime.


Because users can set up live tools on the compound slides, multiple machining operations can be accomplished: off-center drilling, thread cutting, inclined drilling, cross drilling, contour milling, hobbing, bevel gear cutting, and multi-edge turning and more.

  • 40 mm bar diameter
  • 7,000 rpm max. speed
  • 24 kW max. power
  • 57 Nm max. torque



  • Highly-dynamic slide with sliding guide (X-axis)
  • Non-wearing Z-axis dueto quills with hydrostatic support
  • Front-opening machine for bar machining
  • Chuck part machining with loading and unloading by robots
  • Directed part discharge through linear handling
  • Extremely fast swiveling synchronous spindles with C-axis
  • Swing arm is locked by three-piece Hirth coupling in machining position, ensuring maximum rigidity