The Promecam Schiavi GH 630A is a classic of mechanical engineering applied to sheet metal forming. The "GH" prefix identifies the hydraulic guillotine series (vertical cutting), a superior technology compared to swing beam shears in terms of precision and clean cutting. Here is the detailed technical data sheet based on the standard configuration of the time: Cutting Characteristics The abbreviation 630 is the code for its nominal capacities: Cutting capacity (mild steel): 6 mm. Effective cutting length: 3050 mm. Cutting capacity (stainless steel): approximately 4 mm (variable based on the resistance of the material). Blade inclination (Rake Angle): Hydraulically adjustable. This function is fundamental: increasing the angle allows for cutting greater thicknesses or harder materials, while reducing it prevents warping (torsion) on narrow strips. Structure and Mechanics Frame: High-rigidity electro-welded steel monoblock, designed to absorb vibrations. Cutting System: Vertical movement guided by ground gibs. Unlike cheaper models, vertical cutting ensures the blade descends perfectly perpendicularly, resulting in less wear and a better cut. Blade Gap: Manual adjustment (via a side lever or handwheel) to adapt the distance between the blades to the sheet metal thickness, ensuring a burr-free cut. Blank Holder: Series of independent hydraulic pistons that clamp the sheet metal before cutting begins, preventing slippage. Register and Accessories Back Register: Motorized, with a standard stroke usually of 1000 mm. It is controlled via a positioner (often an ELGO or similar in updated models) that allows you to set the desired measurement. Rear Pneumatic Support: This is the "heart" of your setup. These are mobile arms located behind the blade that support the sheet metal as it is pushed against the register. Without it, a 1 or 2 mm sheet metal would flex due to gravity, leading to incorrect measurements. Once the cutting has started, the arms lower to drop the cut piece. Typical Technical Specifications Parameter Indicative Value Motor Power 7.5 - 11 kW Strokes per minute 12 - 20 (depends on the blade inclination) Approximate weight 7,700 kg Overall dimensions (LxWxH) ~ 3,800 x 2,200 x 1,900 mm "Compliant" Equipment (Compliance 81/08) Being a machine from 1980, to be defined as "compliant" today, your GH 630A must have undergone the following interventions: 1. Front Protections: Fixed or mobile grid that prevents fingers from reaching under the blank holders, while still allowing a view of the cutting line. 2. Rear Protections: Side physical barriers and multiple-beam photoelectric barriers that block the machine if someone enters the support area during the cycle. 3. Electrical Panel: Refurbished or upgraded with safety modules, dual contactors, and redundant emergency stop management. 4. Foot Pedal: Covered (to prevent accidental activation) and equipped with a stop button. In short: This is an "old-school" machine, oversized compared to modern shears of the same price range, which makes it extremely long-lasting. If the hydraulic system is in good condition and the guides are free of play, the cutting quality is still professional-grade.