"Evoline" Axial Rolling Heads from Fette Werkzeugtechnik Process-Integrated Rolling of Large Threads in High-Strength Materials

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The "Evoline" axial rolling heads from Fette Werkzeugtechnik, according to the manufacturer LMT, stand for short production times, high thread strength, outstanding service life, and maximum process reliability. The new generation has been specially developed for large threads in high-strength materials and offers an efficient alternative to conventional rolling machines. A practical example from the energy sector demonstrates its performance: up to 50 percent time savings and thus double the output in unmanned operation.

With the new generation of "Evoline" axial rolling heads, LMT Fette offers an efficient, maintenance-friendly, and cost-effective solution for the process-reliable and automated production of large threads in high-strength materials. The product family includes four sizes—"F55 Evo," "F65 Evo," "F75 Evo," and "F85 Evo"—and is designed for high-strength steels up to 1400 N/mm², a hardness range up to HRC 44, as well as thread sizes up to M100 and pitches up to 6 mm s (approx. 0.24 inches).

Long Service Life with High Productivity

The geometrically optimized design and the use of high-performance materials result in a robust, durable, and low-wear construction. This leads to longer service life and minimizes maintenance effort. Up to 100,000 components can be produced per maintenance interval.

Integration into Machine Tools

The axial rolling heads can be seamlessly integrated into existing machine environments, enabling precise, fully automated processes. Complete machining in one line reduces handling and auxiliary times, increases process stability, and boosts productivity.

This gives the rolling heads a decisive advantage over conventional stand-alone rolling machines, which require time-intensive manual steps and high personnel effort. The result: a more efficient manufacturing process and sustainably lower costs per component.

Cost-Effective Solution for Automated Serial Processes

"Rolled threads offer around 30 percent higher strength than cut threads and are therefore often the first choice for safety-critical components. With the new generation of 'Evoline' axial rolling heads, we consistently transfer these advantages to large threads in high-strength materials, creating a cost-effective solution for automated series processes," says Anita Tritschler, Global Product Manager for Rolling Systems at LMT Tools. Typical users are companies requiring reliable and economical processes—particularly in energy generation and supply, construction and infrastructure, the oil and gas industry, as well as machinery and systems engineering.

Manufacturing of Threaded Bolts for Wind Turbines

The performance of the new generation "Evoline" axial rolling heads is demonstrated by an example from the wind power sector. Threaded bolts with double-sided thread M64x6 and a thread length of 250 mm (approx. 9.8 inches) are manufactured from material of strength class 10.9 with a tensile strength of 1000 N/mm².

The starting point was a rolling machine embedded in a heavily manual process chain. Time-intensive work steps, high handling effort, and correspondingly high personnel deployment had a noticeable impact on manufacturing and unit costs.

With the transition to the "Evoline" axial rolling head "F75 Evo," a fully automated, interconnected process with simultaneous machining was implemented, including an AKEA feed unit and automatic workpiece loading.

50 Percent less Manufacturing Time per Component

The result: around 50 percent less production time per component and thus double the output. "The practical example shows what is possible when the rolling process is integrated into a fully automated production structure. With the new generation of 'Evoline' axial rolling heads, the cost per component can be significantly reduced, and competitiveness can be sustainably enhanced," says Anita Tritschler.