For large threads and high-strength materials

The EVOline axial rolling heads from Fette Werkzeugtechnik, a member of the LMT Tools family and a leading expert in rolling systems, stand for short production times, high thread strength, outstanding tool life, and maximum process reliability. The next evolutionary step, the new generation, is now available. Specifically developed for large threads in high-strength materials, it offers an efficient alternative to conventional rolling machines. A practical example from the energy sector demonstrates its performance: up to 50 % 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 economical solution for the reliable and automated production of large threads in high-strength materials. The product family comprises four sizes – F55 EVO, F65 EVO, F75 EVO, and F85 EVO – and is designed for high-strength steels up to 1,400 N/mm², hardness up to HRC 44, thread sizes up to M100, and pitches up to 6 mm.

Long service life with high productivity

Thanks to its geometrically optimized design and the use of high-performance materials, the axial rolling heads offer a robust, durable, and wear-resistant construction. This results in longer service life and minimizes maintenance requirements. Up to 100,000 components can be manufactured per maintenance interval. The axial rolling heads integrate seamlessly into existing machine environments and enable precise, fully automated processes. Complete machining in a single line reduces handling and non-productive time, increases process stability, and boosts productivity. This gives the rolling heads a decisive advantage over conventional stand-alone rolling machines, which require time-consuming manual steps and significant personnel resources. The result: a more efficient manufacturing process and sustainably lower costs per component.

These axial rolling heads can be seamlessly integrated into existing machine environments and enable precise, fully automated processes. Economical Solution for Automated Series Production

“Rolled threads offer approximately 30% higher strength than cut threads and are therefore often the first choice for safety-critical components. With the new generation of EVOline axial roll heads, we are consistently transferring these advantages to large threads in high-strength materials, creating an economical solution for automated series production,” says Anita Tritschler, Global Product Manager for Rolling Systems at LMT Tools. Typical users are companies that require reliable and economical processes – particularly in energy generation and supply, construction and infrastructure, the oil and gas industry, and mechanical and systems engineering.

Manufacturing Threaded Bolts for Wind Turbines with the F75 EVO

An example from the wind power industry demonstrates the performance of the new generation of EVOline axial roll heads. Threaded bolts with M64x6 threads on both ends and a 250 mm thread length are being manufactured from material of strength class 10.9 with a tensile strength of 1,000 N/mm². The starting point was a rolling mill embedded in a largely manual process chain. Time-consuming work steps, high handling effort, and a correspondingly high personnel requirement had a noticeable impact on manufacturing and unit costs.

With the switch to the EVOline Axial Rolling Head F75 EVO, a fully automated, linked process with simultaneous machining was implemented, including an AKEA feed unit and automatic workpiece loading. The result: approximately 50% less manufacturing time per component and thus double the output. "This practical example demonstrates what is possible when the rolling process is integrated into a fully automated manufacturing structure. With the new generation of EVOline Axial Rolling Heads, costs per component can be significantly reduced, and competitiveness can be sustainably strengthened," says Anita Tritschler.