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Leading the way with technological progress
A rarity in the sector, but standard at Kammerer: all key production technologies under one roof. We carry out whirling, grinding, rolling and milling. And all on high-quality, state-of-the-art machines. To stay at the cutting edge of technological process and give our customers a decisive competitive advantage, we have been investing heavily in advanced systems and production processes for decades.
This modern technology is only operated by experienced professionals who possess both in-depth knowledge as well as the necessary precision.
All production technologies under one roof
Kammerer masters all production technologies and is a capable contact partner for all types of screw drive.
Thread whirling
In thread whirling, a special tool called the whirling ring rotates at high speed around the workpiece. The whirling ring is equipped with several inward-facing cutting edges. These cutting edges machine the workpiece as it slowly rotates around its own axis, forming the thread in a continuous process.
This method enables the production of trapezoidal screw drives and ball screw drives with very tight tolerances and high surface quality. Since the thread is formed in a single pass, the process is very fast and efficient.
Thread whirling can be used for a variety of materials and thread types, including hard and difficult-to-machine materials.
Thread rolling
Thread rolling, also known as thread rolling, is a highly efficient process for manufacturing trapezoidal screw drives. In thread rolling, the thread is formed by plastic deformation of the workpiece. This is achieved by applying compressive stresses using special tools that transfer the thread profile onto the workpiece.
Through plastic deformation, the material is compacted, leading to increased strength and load-bearing capacity of the thread. The process is very fast and efficient, as no material is removed and thus no waste is generated.
Thread rolling is ideal for the production of trapezoidal screw drives, as it allows for high precision and surface quality. Additionally, it can be used for a variety of materials and thread types, including hard and difficult-to-machine materials.
Thread grinding
In thread grinding, the trapezoidal or ball screw thread profile is created by material removal using a rotating grinding wheel. This grinding wheel has the negative profile of the desired thread and removes material from the workpiece through its rotation to form the thread. The workpiece is clamped and precisely aligned in a grinding machine. The grinding wheel, which carries the thread profile, is mounted on the machine and rotates at high speed along the workpiece. The workpiece itself can also rotate to ensure uniform machining. The abrasive grains on the grinding wheel remove thin layers of material from the workpiece, forming the thread.
This process enables the production of threads with very tight tolerances. Thread grinding offers high repeatability. It can be used for a variety of materials and thread types.
Hard thread turning
Hard turning a nut of a ball screw drive hardened to 60HRC on a hard turning machine is a highly precise process.
The machine settings are crucial for the success of the process. The spindle speed and feed rate are adjusted based on the material and the desired thread profile. Since it is a dry machining process, coolant is not used. Instead, the thermal stability of the machine is relied upon.
The cutting process begins with an initial cut to smooth the surface of the workpiece and create a base for the thread. The tool is guided along the axis of the workpiece to cut the thread in multiple passes, achieving the desired depth and profile. During cutting, accuracy is continuously monitored to ensure that the total pitch error remains below 3 µm and the contact angle variation stays under 3°.
After cutting, the thread is inspected for dimensional accuracy and surface quality. This can be done using tactile or optical measurement methods. If necessary, a finishing process is performed to achieve the final surface quality.
