Updated 8/26/2024 Published 1/12/2023

Bridging the Gap Between Traditional Single- and Multi-Spindles

This twin-spindle automatic lathe with six cross-slide mounted turrets is designed for medium-sized production runs that might not be suitable for conventional multi-spindles.

Edited by: Derek Korn

Editor-in-Chief, Production Machining magazine

At IMTS 2022, Schütte USA introduced its new ECX series of twin-spindle automatic lathes. According to the company, this can be a cost-effective alternative to other complex multi-spindles with rigidity and torque as much as three times higher than conventional multi-spindles. It also says the ECX offers a solution as a highly productive, twin-spindle automatic for preproduction batches (PPAP) or batch sizes of complex workpieces that are below the practical or economic application limit for multi-spindles.

The ECX machine series is said to provide a practical, productive and flexible way to bridge the production gap between multi-spindles and the standard single-spindle automatics. Its main work area shown here features six multi-tool turrets. Photo Credit: Schütte USA

The ECX series is offered in two models with motorized main spindles of 46 mm/7,000 rpm and 65 mm/5,000 rpm. Providing the flexibility and simple handling of single-spindle automatics and the productivity of multi-spindle automatics in a two-spindle configuration, the ECX enables users to accomplish parallel machining with up to six cross-slide mounted turrets (four for the main spindle and two for the counter spindle). An optional single-axis slide may be added for cutoff.

The typical configuration includes a Y axis for multi-axis interpolation on all turrets. Live driven tools are also a common option for all turret positions for multi-axis interpolation. The counter spindle permits automatic machining of both front and back ends of a part. A 120-degree separation on the turrets between tool positions with a precision tool interface for axial and radial tooling is said to offer accuracy, rigidity and ample clearance between adjacent tool positions.

The machine’s counter-spindle area offers automated part handling shown to the right. Photo Credit: Schütte USA

The ECX’s rigid frame construction with two opposing upright structures provides an open workspace which enables chips to fall freely to the chip conveyor during machining cycles. Workspace accessibility from both sides of the machine helps keep setup times short while precise, modular tooling interfaces on the turrets enable quick change of preset tooling that can be staged during production. All drives, guideways and cables are housed within the structure, providing a safe, uncluttered workzone.

High-precision and cutting process damping is said to be assured through hydrostatic bearings. A modular handling system for simple parts as well as delicate finished workpieces is available. Schütte’s SICS HMI software permits easy and quick configuration, programming, and operation through a 22-inch touchscreen.

Shorter product life cycles, greater complexity of components and smaller batches typically require greater retooling flexibility from machines for future workpieces. The company says that is what the ECX series (which was introduced to the North American market at IMTS 2022) is designed to deliver. Photo Credit: PM

According to Schütte USA President Jeffrey Reinert, “Schütte has a solid reputation as a builder of top quality, multi-spindle machine tools and, based on that foundation, we plan to accelerate the company’s growth curve to take us into more markets. Complementing our sales outreach will be a buildup in our service, engineering and customer support programs.” Reinert also notes the long-range plans for Schütte USA include upgrades to the facility in Jackson, Michigan, with more demonstration machines.