All machines from the category Fixed head automatic turning machine

How a fixed head automatic turning machine works

A fixed head automatic turning machine is a specialized CNC turning machine for the series production of short, rotationally symmetrical precision parts made of metal. It typically processes workpieces with a length of up to about three times the diameter (CNC turning machine for small parts).

Fixed head automatic turning machines are highly productive and precise. The machining process begins with the clamping of round material, which is fed from a bar. This bar is automatically fed by a bar loader. The tools are mounted on turrets or linear slides and perform various operations such as turning, drilling, milling, thread cutting, or parting off. Machining often takes place in several axes simultaneously, which can significantly reduce cycle times.

Advantages of a fixed head automatic turning machine

Thanks to state-of-the-art control technology, fixed head automatic turning machines are capable of producing complex geometries with very tight tolerances. The machines often operate unmanned in multi-shift operation and are equipped with monitoring systems such as tool breakage control or automatic dimensional control. Back side machining with a counter spindle is also possible, so that the workpiece is manufactured completely in a single clamping.

Design of a fixed head automatic turning machine

The main spindle is fixed and drives the workpiece. A tool turret or linear slide holds various cutting tools. A counter spindle for rear machining is available as an option. The bar feeder automatically supplies the machine with raw material. The Control enables precise movements in several axes. Other components include a cooling lubricant supply, chip conveyor, tool measurement systems, and often a soundproof cabin. Modern models feature automation solutions such as workpiece grippers or camera-based quality assurance systems.

Applications in industrial manufacturing

Fixed head automatic turning machines are widely used in industrial series production, particularly in the automotive industry, medical technology, electronics, precision engineering, aviation, hydraulic and pneumatic technology, and mechanical engineering. Wherever large quantities of small, precise turned parts are required, the fixed head automatic turning machine is the machine of choice.

Typical workpieces are:

• Axle journals
• Valve needles
• Plug housings
• Screws
• Bolts
• Bushings
• Bearing sleeves
• Nozzle inserts
• Contact pins
• Sensor mounts
• Hydraulic adapters

These parts usually have complex contours and require tight dimensional tolerances and perfect surface quality.

Thanks to its ability to perform complete machining in a single clamping, the fixed head automatic turning machine is particularly efficient and economical—ideal for repeatable production with low scrap rates.

Differences between a fixed head automatic turning machine and a sliding head automatic turning machine

The characteristic feature of a short turning machine is the fixed main spindle: in contrast to sliding head automatic turning machines, the workpiece does not move axially during machining. Instead, all machining operations are performed by moving the tools along the workpiece axis.

• Fixed head automatic turning machine (short turner): Offers faster machining times and is often more flexible in the series production of complex parts. Fixed head automatic turning machines specialize in workpieces with:
  • Lengths of up to approximately 200 millimeters
  • Diameters between approx. 10 and 65 millimeters
  Suitable for series production of shorter, complex parts such as:
  • Bushings
  • Bolts
  • Fittings
• Sliding head automatic turning machine: Suitable for long and thin workpieces with high precision thanks to a movable spindle and guide bush. Typical workpiece dimensions:
  • Lengths of several hundred millimeters
  • Diameters from a few millimeters to approx. 32 millimeters
  Ideal for components such as:
  • Shafts
  • Screws

Differences between a fixed head automatic turning machine and a multi-spindle turning machine

A multi-spindle automatic lathe (also known as a multi-spindle lathe or multi-spindle turning machine) has several main spindles—typically 4, 6, or 8—arranged in a spindle head rotary table. Each spindle performs part of the machining process while the workpiece is transported from station to station. This means that a different machining step can take place simultaneously on each spindle. This significantly reduces the cycle time per part.

The differences in brief:

• Short-turning machine: one main spindle (possibly with a Counter spindle), linear machining with fixed or movable tools.
• Multi-spindle: multiple main spindles, rotating machining stations, parallel machining of multiple workpieces.

Both machine types are designed for the series production of small to medium-sized precision parts, which is why they are often used in the same industries, such as the automotive industry or electrical engineering.

Tools, accessories, and operating materials for a fixed head automatic turning machine

Depending on the machining requirements, numerous tools are used in fixed head automatic turning machines: turning tools, drilling tools, thread cutters, reamers, milling tools, cutting tools, grooving tools, boring tools, reverse drills, and thread formers. These tools are often modular in design and optimized for quick changeover. Many machines also use powered tools to perform cross drilling or milling operations. The choice of tool depends on the material, geometry, and tolerance requirements of the workpiece.

Various accessories and operating materials are required for the smooth, automated operation of a fixed head automatic turning machine: An automatic bar loader is essential for series production. In addition, high-quality clamping devices, tool holders, coolants (usually emulsion or oil), chip conveyors, and filter systems are required. Measuring and control systems, such as probes or camera units, support process reliability. Optional accessories such as workpiece grippers, sorting units, or automation systems further increase productivity. Regular maintenance and the use of suitable lubricants and cleaning agents are essential for long-term, trouble-free operation.

Leading manufacturers of fixed head automatic turning machines

Our manufacturers directory includes companies that produce fixed head automatic turning machines for metalworking.

The following terms are frequently searched for: Index fixed head automatic turning machine, Traub fixed head automatic turning machine, Citizen fixed head automatic turning machine, Miyano fixed head automatic turning machine, DMG Mori fixed head automatic turning machine, Ergomat fixed head automatic turning machine, Star Micronics fixed head automatic turning machine, transco fixed head automatic turning machine

Selecting the right fixed head automatic turning machine

If you want to buy a fixed head automatic turning machine, there are several important features and specifications to consider.

• Key features include the maximum bar capacity, the number of axes, and whether the machine is equipped with a counter spindle or driven tools.
• The stability of the machine bed is also crucial, as it has a significant impact on precision.
• Fast tool changes, short setup times, and modern Control increase efficiency.
• Cutting speed, rapid traverse speed, and repeat accuracy are also important.
• An automatic bar loader is almost indispensable for series production.
• Process monitoring, workpiece measurement, and automation solutions can be integrated as options.
• The availability of spare parts and the manufacturer's service should also be taken into account in order to avoid long downtimes.
• Finally, energy efficiency is playing an increasingly important role in purchasing decisions.

Search now at maschinenauswahl.de to find the fixed head automatic turning machine that suits your production requirements.