Vertical Gantry Shear

Compare shear designs by their material-control and loading method before comparing force. Alligator Shear may address a different feed and handling duty from Vertical Gantry Shear. The right design is the one that accepts the approved sections consistently and delivers the required cut scrap without excessive repositioning or downstream waiting.

Compare each design against the same questions:

• What feed shape can it accept within its approved limits?
• How is material supported and controlled?
• How much repositioning is required?
• What finished size and sustained output are needed?
• How will cut scrap be removed?

Consider maximum section dimensions, material control during cutting, feeding effort, output size and the complete operating cycle. Submit representative scrap information so the proposed design can be assessed for the real workload and required protective arrangements.

Describe ferrous scrap by grade, section and condition rather than simply calling it steel. Plate, pipe, profiles and mixed fabricated pieces can require different presentation and control. Alligator Shear and Vertical Gantry Shear should be evaluated against explicit approved sections; neither product category establishes unrestricted cutting capability.

Send information about the actual scrap stream rather than describing it only as steel. The proposed machine should have a clear accepted-material specification, including exclusions and any preparation required before loading.

Cutting force must be assessed from the actual cross-section and material, not its outside dimensions alone. A hollow tube and a solid bar of the same diameter create different duties. Supply the difficult normal sections and known material properties so the proposed shear can be assessed as a complete blade, structure and hydraulic combination.

• Material grade or known strength.
• Solid, hollow or built-up cross-section.
• Maximum wall or plate thickness and width.
• How the piece is presented to the blades.
• Required cut length and sustained production.

Provide section drawings, thickness, alloy and maximum dimensions. The machine supplier should define approved material limits for the selected shear. Avoid treating a force number as permission to cut any object that fits.

A shear only produces when approved scrap is ready for the next cut and the discharge route is available. Repositioning awkward pieces or removing rejected loads can dominate the elapsed cycle. Measure loading effort with the real material-handler arrangement instead of inferring production from the speed of an unloaded cutting stroke.

Define the loading arrangement and operating area as part of selection. Compare output under realistic feeding conditions, including any preparation and collection steps. A no-load stroke rate is not equivalent to processed tonnes per hour.

Choose the finished length from the receiver's acceptance specification, then establish how the feeding arrangement can achieve it with irregular scrap. Maximum permissible size and preferred average size are not necessarily the same requirement. Agree allowed variation and the measurement method rather than treating a selected feed increment as a promise of identical pieces.

1. Obtain the receiving process's maximum and preferred dimensions.
2. Identify the feed geometries the machine must handle.
3. Confirm the selected feeding and length-control method.
4. Agree permitted variation and how irregular pieces are assessed.
5. Test representative output where consistency is essential.

Confirm any allowable tolerance and the expected variation for irregular scrap. A target length does not guarantee identical pieces when feed geometry varies. Test representative material if output-size consistency is critical.