D28 CNC Machined 3D Welding Table For Accurate Welding Jigs

D28 CNC Machined 3D Welding Table For Accurate Welding Jigs is a heavy-duty modular fixturing platform designed to build repeatable, high-precision welding jigs for manual and robotic welding. Fully five-side CNC machined with Φ28 H7 holes on a 100 mm grid, this flexible welding table goes through strict stress relief and nitriding treatment to minimise thermal deformation, resist weld spatter sticking and extend service life. Fully compatible with standard D28 fixture accessories, it allows rapid reconfiguration between different workpieces, removing the high cost and long lead time of custom one-off jigs. It is widely trusted for chassis, frames, agricultural equipment and heavy structural fabrication.

1. 1 Hole Specifications Hole diameter φ28.065–28.149 mm (H7 tolerance); hole spacing 100 ± 0.05 mm; grid pattern 100 × 100 mm. Compatible with the full range of D28 standard accessories (quick-locking pins, clamps, positioning squares, support blocks, V-blocks, etc.).
2. 2 Precision Metrics
   • Flatness: Standard ≤ 0.1 mm/1000 mm; for robotic welding applications, it can reach 0.05 mm/1000 mm or higher.
   • Perpendicularity: ≤ 0.1 mm/200 mm (between the side faces and the tabletop).
   • Surface Roughness: Ra 3.2; the tabletop can be laser-etched with millimetre-scale markings for quick reading and positioning.
3. 3 Primary Material Options
   • HT300 Gray Cast Iron: Offers excellent vibration damping and makes weld spatter easy to remove.
   • Q355 (S355JR) Welded Steel: Provides superior toughness and cost-effectiveness; ideal for heavy-duty fabrication, steel structures, and welding thick plates.
4. 4 Surface Treatment Nitriding (hardness HV 550–900), which enhances wear resistance, prevents weld spatter adhesion, and provides rust protection. Alternative finishes such as black oxide or powder coating are also available.
5. 5 Load Capacity Standard-leg configurations support a static load of approximately 2 tons; reinforced-frame versions can support up to 5 tons. Individual support legs have a load capacity of 700–1000 kg. Multiple units can be joined together to create an expansive work surface (e.g., exceeding 4000 mm in length).
6. 6 Dimensions Fully customizable. Common sizes include 1000 × 2000 mm, 1500 × 3000 mm, and 2000 × 4000 mm. The standard plate thickness is 25 mm, with a typical platform height of 200 mm; support leg height can be customized to specific requirements.

• ✓Flexible and Versatile: Switch between products simply by reconfiguring the fixture components, saving time and costs on tooling development.
• ✓High Precision: CNC-machined and stress-relieved for long-term stability.
• ✓Heavy-Duty and Durable: Features large D28 holes and high-rigidity locking pins — ideal for medium-to-large, thick-walled steel structures.
• ✓Modular and Expandable: Multiple tables can be joined together to accommodate extra-long or oversized workpieces.