Are you building a custom DIY spot welder or designing a professional-grade resistance welding station? MechStream now offers the essential Spot Welding Box drawing, available for immediate download. This critical CAD file provides the complete sheet metal enclosure design, engineered specifically to house the high-power components of a spot welder, such as a large transformer (e.g., a repurposed MOT), control boards, and high-current wiring.

This free drawing is indispensable for hobbyists, engineers, and fabricators. A proper spot welder housing is not just a simple box; it is a critical safety component. Our design ensures proper ventilation to manage the intense heat generated during operation and provides the structural support needed for heavy components. It is designed to isolate the high-voltage primary circuits from the low-voltage, high-amperage secondary, ensuring operator safety.

Stop trying to modify a generic project box that can’t handle the thermal and electrical demands. This fabrication-ready model includes precise cutouts for controllers, switches, cooling fans, and the heavy-duty electrode arm mounts. Download this file to get a massive head start on your project, ensuring a professional, safe, and robust build.

Key Features:

  • Heavy-Duty Sheet Metal: A robust design engineered to support the weight of heavy transformers and withstand a workshop environment.
  • Optimized Ventilation: Includes strategically placed vent patterns to ensure maximum airflow and cooling for the transformer and control electronics.
  • Component-Ready: Features precise cutouts for common spot welder controllers, timers, digital displays, and power switches.
  • Safety-First Design: Engineered to properly house and segregate high-voltage and low-voltage components, with secure grounding points.
  • Multi-Format CAD: Provided in DWG and STEP formats for immediate use in AutoCAD, SolidWorks, and other sheet metal design software.