Sheet Metal: Deep Hole Cutting

Sheet metal machining includes traditional cutting and blanking, blanking, bending and forming methods and process parameters, as well as various cold stamping die structures and process parameters, various equipment working principles and operating methods, and new stamping technologies. And new processes. Sheet metal machining of parts is called sheet metal machining.

Machining Process

For example, the use of plates to make chimneys, iron drums, fuel tanks, oil tanks, ventilation ducts, elbows, rounded places, funnel shapes, etc. The main processes are shearing, buckling, bending, welding, riveting.

  1. Check if the drawing is complete.
  2. The relationship between drawings and views, whether the labeling is clear and complete, and the dimension unit.
  3. Assembly relationship, assembly requires focus on size.
  4. The difference between the old and new layouts.
  5. Translation of foreign maps.
  6. Surface code conversion.
  7. Drawing problems feedback and burying.
  8. Choose material.
  9. Quality requirements and process requirements.
  10. Official release drawings must be stamped with quality control

We take great pride in our industry-leading custom steel fabrication and metal fabrication service. This is the core of our business, and is a process we take seriously. PTJ Prototype Shop has been a machine shop and metal fabricator near Dongguan, CN for 12 years. We work on small, large, and heavy components. Our team of experts provide our customers with turnkey precision metal fabrication services. Our fabrication service includes: laser cutting, metal bending, forming, and machining, TIG/MIG welding, assembly and finishing.

Our customers should know that from the moment a job goes into production until the time it is shipped, PTJ Prototype Shop is a fabricator who exercises complete control over every operation in the fabrication process. Moreover, in accordance with our ISO 9001:2015/AS9100 quality procedures, there is total traceability of, and accountability for, every job we have in production.

Let us be your single source for your assembly and sub-assembly needs. Contact Us early and we will help you spend your money wisely.

Sheet Metal Fabrication Service Capabilities

General Capabilities
  • Contract Production
  • Prototype
Fabrication Method
  • Bending
  • Cutting
  • Forming
  • Laser Cutting
  • Sawing

  • Counterboring
  • Countersinking
  • Tapping


  • MIG
  • TIG
  • Stick
  • Resistance
Material Thickness
  • Laser
  • 3/8″ Steel
  • 1/8″ Alum and Stainless Steel
  • Max (Press Brake): 7 Gauge Mild Steel x 8 FT.
  • Max (Laser): 10 ft
  • Max (Press Brake): 8 ft
  • Max (Laser): 5 ft
  • Max (Press Brake): 40 in (Mild Steel)
Tonnage (Press brake)
  • Max: 88 Tons
  • Max: 500 lbs
  • Max: 500 lbs
Tolerance (+/-)
  • ±.005 in
  • Alloys
  • Aluminum
  • Brass
  • Bronze
  • Stainless Steel
  • Steel
  • Copper
Additional Services Provided
  • Anodizing
  • Bead Blasting
  • Deburring
  • Finishing
  • Painting
  • Plating
  • Polishing
  • Powder Coating
  • Silk Screen
  • Pem Setting
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