Crane structural components manufactured to customer drawings

Crane boom heads and end sections transfer working loads through welded members, pin joints and connection interfaces. Realjet supplies contract machinery manufacturing for these project-specific structures, coordinating steel preparation, jig welding, machining and coating around the approved design.

The component shown is a representative delivered crane structure. It demonstrates the type of construction machinery machining and fabrication work Realjet can undertake, but it is not offered as a standard replacement part. Section geometry, steel grades, weld details, connection dimensions and inspection criteria must come from the equipment manufacturer or authorised project documentation.

Process route

Plates, tubes and profiles are prepared using suitable cutting equipment before tack assembly in dedicated fixtures. Welding sequences are planned to control distortion across the lattice structure. After welding, specified pin bores, mounting faces and connection holes can be drilled or machined to restore the required relationship between interfaces. The completed assembly then proceeds through dimensional verification, surface preparation and the specified coating process.

Key production controls can include:

  • traceable materials and drawing revisions;
  • fixture references for overall length, centre lines and joint positions;
  • visual and specified weld inspection;
  • verification of pin-hole size, alignment and spacing;
  • coating thickness and final-condition checks;
  • assembly or fit checks where mating information is available.

Applications and purchasing information

This service is suitable for crane manufacturers, heavy-equipment producers and engineering companies sourcing boom heads, lattice sections and related welded assemblies. Realjet can support prototype validation, scheduled batch production and repeat supply under an agreed quality plan.

For technical review, send drawings, bill of materials, annual or batch quantity, welding standard, machining tolerances, coating specification and inspection requirements. Through its contract machining and machinery fabrication capability, Realjet can organise the complete made-to-drawing production route instead of splitting the structure across multiple suppliers.