Electric press brake Spira series

CNC2-axis4-axis

Product overview
The Spira series press brakes are electric press brakes designed for sustainability and stable bending performance. They operate without hydraulic oil, reducing environmental impact and eliminating variability due to temperature, ageing and hygroscopicity. Servomotors engage only during the bending stroke to minimise standby energy consumption.

General configuration
All machines feature two synchronized axes (Y1‑Y2) and a 4‑axis backgauge (X, R, Z1, Z2) to support accurate positioning and repeatability during production.

Technical Data (summary table)
Model | Spira 35/1350 | Spira 50/1650 | Spira 70/2050 | Spira 70/2500
tonnage [t] | 35 | 50 | 70 | 70
length [mm] | 1350 | 1650 | 2050 | 2500
distance between side frames [mm] | 1300 | 1300 | 1700 | 2000
throat [mm] | 150 | 210 | 300 | 300
stroke [mm] | 180 | 180 | 200 | 200
adapter/bench open height [mm] | 410 | 410 | 430 | 430
X axis stroke [mm] | 400 | 400 | 600 | 600
R axis stroke [mm] | 150 | 150 | 150 | 150
Y1-Y2 axes power [kW] | 2×8.6 | 2×16 | 2×21 | 2×21
Average power [kW] | 2.3 | 2.4 | 2.4 | 2.7
dimensions L×W×H [mm] | 2300×1650×2200 | 2600×1900×2200 | 2680×1610×2560 | 2990×1610×2545
Weight [kg] | 4000 | 5000 | 6250 | 6500
crowning | no | no | no | mechanical

Components and processes

• Controlled speed: High-performance servo motors deliver stable, programmable speed profiles.
• Precision and durability: Worm screws and C5 steel guides ensure precise movement and long life.
• Y-axis positioning: Positioning accuracy down to 0.005 mm for high repeatability.
• Heat treatment: Machine structure heat-treated up to 650 °C to relieve internal stresses and reduce long-term deformation.

Reliability as a principle
A dual‑servo architecture independently controls Y1 (left ram) and Y2 (right ram) with high‑speed servomotors, providing high speed, precision and optimized cost of ownership.
Components used:

• Screws: Techmation (TW-JP) or TSUBAKI NAKASHIMA (JP)
• Thrust bearings: NSK (JP)
• Belt: Gates (USA)
• Machine CNC: STEP (IT)
• Optical scales: GIVI Misure (IT)
• Electrical components: Schneider (FR)
• Linear guides and slides: HIWIN (TW)
• Backgauge recirculating screws: HIWIN (TW)

Environmental and energy benefits
The Spira series uses no hydraulic oil, lowering environmental impact and disposal costs. Oil-free operation removes variability from temperature and ageing. Servomotors operate only during bending, resulting in very low standby consumption.

CNC and interfaceability
Equipped with CNC systems from Step Automation, Spira machines support 3D models and programs via an intuitive graphical interface. Multiple options enable CNC, offline software and Industry 4.0 functions for production management, maintenance and remote supervision. New-generation ROCK controls offer advanced programming and press brake management.

LazerSafe safety system
The LazerSafe LZS-2 laser light barrier protects the punch danger zone, detecting intrusions and stopping the machine automatically. Key parameters:

• Detection resolution: Approx. 4 mm for high sensitivity to small objects.
• Response speed: Very fast, typically under 1 ms.
• Laser type: Class 1M laser.
• Advanced safety features: Continuous stop-distance monitoring, Tray/Box mode for complex bends, automatic muting point management.
• Compatibility: Integrates with various press brake types and non-standard tools.

Proactive maintenance and monitoring
Optional predictive maintenance and energy analysis platforms monitor key components, detect anomalies early and provide dashboards for utilisation rate, energy efficiency and cost over configurable intervals. Systems can interface with MES for detailed production-cost analysis.

Characteristics / technical specifications

• Series: Spira series
• Axes: Y1 - Y2 (two axes); backgauge: X, R, Z1, Z2 (4-axis)
• Available models and nominal tonnages: Spira 35/1350 (35 t), Spira 50/1650 (50 t), Spira 70/2050 (70 t), Spira 70/2500 (70 t)
• Working lengths: 1350 mm, 1650 mm, 2050 mm, 2500 mm
• Throat: 150 / 210 / 300 mm depending on model
• Ram stroke: 180–200 mm depending on model
• Adapter/bench open height: 410–430 mm
• X axis stroke: 400–600 mm
• R axis stroke: 150 mm
• Y1-Y2 axes installed power: from 2×8.6 kW up to 2×21 kW
• Average power consumption: approx. 2.3–2.7 kW depending on model
• Dimensions (L×W×H) and weight vary by model (see table above)
• Crowning: mechanical on larger models, none on some configurations
• Construction features: worm screws, C5 steel guides, heat-treated structure, high-accuracy Y-axis positioning (0.005 mm)