Special screws lathe work

Mechanical engineering

In mechanical and plant engineering, turned special screws are indispensable for the secure assembly, adjustment, and maintenance of complex structures. They ensure that modular units, such as drive trains, tool holders, or protective enclosures, are reliably and permanently connected. Under high loads due to torque, vibration, or alternating forces, specially manufactured thread and head geometries guarantee maximum safety - for permanently stressed fixings as well as frequently detachable maintenance connections. Examples include the assembly of large gear units in packaging lines, guide units in robotics, or in precision axes in manufacturing centers.

Medical technology

In medical devices, operating tables, surgical instruments, or even prostheses, customized special screws ensure optimal function and safety. They enable the realization of designs precisely adapted to hygiene requirements and minimally invasive assembly, and offer the highest material quality – for example, in the form of biocompatible stainless steel or special alloys that meet sterilization requirements.

Construction industry

In construction, special bolts serve as load-bearing elements for both temporary and permanent connections—such as those between steel beams, wooden structures, or precast components. Bolts with increased lengths, special thread forms, or integrated locking features are in particular demand when high static and dynamic forces need to be transferred and compliance with standards for stability must be ensured. They secure assemblies in bridge, tunnel, and plant construction just as reliably as they do temporary support systems and assembly aids on large construction sites.

Energy and environmental technology

In wind power and photovoltaic plants, hydropower stations, or processing facilities, special bolts are subjected to high environmental stresses and fluctuating load peaks. They are manufactured from particularly corrosion-resistant or high-strength alloys in order to create durable and maintenance-friendly connections for components such as rotor caps, tower segments, or attachments. Specific surface treatments can further increase their resistance to aggressive media and improve maintenance friendliness in the field.

Electronics industry

In electronics, small-format special screws ensure the fastening and precise positioning of circuit boards, modules, and housings. Their customization – such as miniaturized versions, special head profiles, insulating coatings, or sealing functions – makes it possible to implement space-saving yet maintenance-friendly connection solutions in confined spaces. Especially in units subject to vibration or in automated assembly, special screws offer decisive advantages in terms of functionality and process reliability.

Food industry

In sensitive production, filling, and packaging systems, hygienic special screws made of stainless steel are the standard for permanent and easy-to-clean connections. They meet the highest requirements for food safety, corrosion resistance, and cleanability. Even with constant exposure to liquids, steam, or chemical cleaners, they retain their connection strength and make a significant contribution to extending cleaning intervals and reducing maintenance costs. They are used, for example, in mixing, separating, or dosing units, or in plant engineering for processing animal and plant-based raw materials.

Various shapes and lengths for any quantity

When it comes to round objects, we supply special screws and the like with diameters from 4 mm to 65 mm. In terms of the respective length of the screws or bolts, our options range from at least 5 mm to 350 mm. This allows for numerous applications and connections, such as in vehicles and machinery.

Simply let us know the exact quantities you need for your requirements. We are also very flexible with the numbers and achieve very high quantities with our efficient special screw manufacturing. Depending on the type, effort, and scope, we are happy to handle small, medium, and large series for you.

The most common materials: Steels of variable quality

Our experience and demand have led us to stock various types of steel in very large quantities. Primarily, undercut steel, stainless steel A2, and stainless steel in A4 quality are often processed and provide an excellent basis for many of our products. Special bolts, however, can also be made from other steels that we select based on specific properties:

• high strength
• corrosion resistant
• seawater resistant
• high-temperature

Special turned screws, special turned nuts – processing options

Special screws offer a variety of possibilities to customize them and adapt to the specific requirements of a project. This includes, among other things, cross holes, grooves, or various milling. The range of possibilities expands even further with various thread types.

Selection of processing options:

• Polygon turning
• Spanner surface
• Internal hexagon
• Thread types:
  • metric or inch thread
  • regular, fine-pitch and left hand thread
• Complicated geometries

Furthermore, special screws can also be individually marked to allow for easy identification. With these diverse design options, special screws are the ideal solution for demanding applications where standard products are insufficient.

Coating

Besides special surfaces, we are more than happy to perform the aforementioned electroplated galvanizing for you. This process applies a thin protective layer of zinc on the workpiece's surface, acting as a barrier to protect the underlying metal from penetrating water.

Treatment

Another form of treatment comes from handling oils, greases, and the like. It may be sensible to keep the surfaces completely oil-free, or a defined oil film may be applied. This entirely depends on your wishes and the subsequent use.

Finishing

The finishing of surfaces refers to the targeted modification of properties through various processes such as heat treatment, coating, or finishing. In our special screw production, there are primarily three common variants:

• Grinding: In this mechanical processing method to produce smooth surfaces, we (mechanically) remove material using grinding bodies.
• Tempering: Through heat treatment processes, the hardness and strength of metals are improved. This is achieved by controlled heating and rapid cooling.
• Nitrocarburizing: In this thermochemical surface treatment process for steel, nitrogen and carbon are diffused into the surface. This increases the steel's hardness, wear resistance, and corrosion resistance.