A complex chuck lathe produced component, including eloxal coating.

As a specialist in broad range of services, we are capable of equipping your CNC chuck lathe individually and flexibly, through automated robotic cells, and producing components with max. diameter of 320 mm. Shafts with high surface demands are our speciality. Also, with other integrated manufacturing possibilities, such as grinding, rolling, and super-finishing.

With our CNC turning technology, we are capable of producing very precise turned components. From a single piece up to a small series, we realize a high number of geometries.

In addition to conventional turning operations, we also offer the following supplementary turning work:

Hard turning

Hard turning is a variant of hard machining, for the production of materials with hardness of more than 54 HRC. Traditionally, this was only achievable using grinding and lapping. With the development of so-called super hard cutting materials (tool materials), such as cubic boron nitride, machining of hard materials is now also possible by turning, drilling or milling, which brings a multitude of benefits. Hard milling is also basically possible using cutting ceramics from silicon nitride and cemented carbide, however, the tools wear much faster.

The workpieces can be machined directly in the hardened state. This eliminates both soft annealing, and grinding, which results in a shorter process duration. In addition, expensive grinding machines can be excluded by machining on more beneficial lathes. Also, hard machining is more economical, since a higher volume of material can be removed within a time unit (higher volume of cut material per unit of time). Since the workpiece shape is controlled by the tool movements during hard machining, it is also more flexible than grinding, where the workpiece shape is partially included in the tool. Due to higher thickness of the cut layer, hard machining requires less energy, and it can be used with none or only a small amount of lubricating and cooling liquid, compared to the method of dry machining, eventually with a minimum volume of lubrication and cooling. Hard machining is used for complicated shapes, whereas the long straight shafts are more economically machined by grinding, since the wider grinding disks provide shorter machining durations in this case.

Fine precise turning

Based on achievable precision, turning is divided into “conventional turning” (also in terms of “turning without CNC control”), fine turning, or precise turning with achievable ISO tolerances of IT6 to IT7, highly precise turning (IT6 to IT2), and ultra-precise turning (IT1 to IT01). The feed is hereat reduced: For precise turning, it is approx. 100µm per turn, for highly precise turning, it is 10 µm, and for ultra-precise machining, it is a few micrometres. The production of optical devices and tools (primarily lenses and mirrors) is the driving force for the improvement of precision. For ultra-precise machining, diamond tools are typical owing to their little wear. Special ultra-precise lathes are used. They achieve high repeated precision owing to their special construction specifications. They include the main spindle with high rigidity, aerodynamic and hydrostatic placement of the spindle, special basement and damping systems for the reduction of vibration.

Detail data

Size of batches 100 - 10,000 pieces
Diameter of parts Max. 320mm
Range of tolerances IT7 from non-machined piece; IT5 with additional grinding
Materials Aluminium, steel, high quality steel, brass, special copper alloy, titanium, sintered material
Options Loading robot for pieces count up to 100,000 pieces
Additional modifications Hardening, grinding, surface coating, phosphate coating, eloxal coating and laser welding or laser labelling