SE 520 SL service

SE 520 SL service is provided for the CNC universal center lathe originally manufactured by TOS / TRENS Trenčín, based on the SE 520 design but extended with a longer bed up to 2000 mm between centers and a fully enclosed working area. The SE 520 SL NUMERIC is designed primarily for efficient machining of long rotational components with high demands on accuracy, safety and productivity.

Although production of the SE 520 SL NUMERIC has been discontinued, we continue to provide complete service, spare parts supply, technical support and modernization options to ensure reliable long‑term operation.

Characteristics of the SE 520 SL NUMERIC Lathe

The SE 520 SL NUMERIC belongs to the category of CNC universal center lathes and is particularly suitable for machining long shaft‑type and flange‑type workpieces made of metal and plastic materials. Thanks to its extended bed and fully enclosed working area, it significantly expands technological capabilities compared to the standard SE 520 version.

The machine can be supplied in various special configurations and equipped with a wide range of accessories to meet specific technological requirements.

Manual and Automatic CNC Operation

The SE 520 SL NUMERIC allows operation in two modes:

manual turning using electronic handwheels,
automatic CNC operation via a modern control system.

This combination is especially advantageous in single‑piece and small‑batch production, allowing fast response to changing orders while simultaneously increasing productivity.

Machine Design and Machining Accuracy

The SE 520 SL NUMERIC is designed with a strong emphasis on long service life and stable machining accuracy:

key machine components are stress‑relieved by annealing,
belt‑driven spindle transmission minimizes vibration during machining,
automatic gear shifting within CNC cycles improves production efficiency,
bearings with lifetime grease lubrication reduce operating costs.

The overall machine design ensures high accuracy and long‑term stability throughout the entire service life.

Safety, Enclosure and Productivity

A major feature of the SE 520 SL NUMERIC is its fully enclosed working area, which:

protects the operator from flying chips,
prevents coolant leakage,
enables the use of higher coolant pressures and higher cutting speeds.

This significantly increases productivity while maintaining maximum operator safety. The machine is equipped with automatic door locking and impact‑resistant safety glass as standard.

Equipment, Ergonomics and Configuration Flexibility

The SE 520 SL NUMERIC offers a highly comfortable working environment, including:

movable control panel with a 15″ Siemens touch screen,
intuitive and user‑friendly software interface,
LED workspace lighting,
centralized automatic lubrication system.

Extensive configuration options include:

hydraulic workpiece clamping,
hydraulically operated tailstock,
hydraulically or manually operated self‑centering steadies,
mounting block for anti‑vibration boring bars,
driven tools,
wide range of clamping plates.

SE 520 SL Service and Spare Parts

Even though the SE 520 SL NUMERIC is no longer in production, we provide comprehensive SE 520 SL service, including:

service of mechanical, electrical and CNC components,
supply of SE 520 SL spare parts,
spindle, gearbox and drive repairs and adjustments,
CNC control system and operator panel service,
fault diagnostics and technical audits,
preventive and scheduled maintenance.

If original components are no longer available, we propose technically equivalent replacement solutions with a strong focus on safety, accuracy and machine lifetime.