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Standard D28 Welding Table with 28mm Bore Diameter

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Standard D28 Welding Table with 28mm Bore Diameter

Table Top Thickness : 25mm

Model Number : D28

MOQ : 1 PCS

Hole Tolerance : D10: Φ28.065‑28.149 mm

Supply Ability : 500 units/month

Standard Table Height : 200 mm (table top only, exclude stand)

Perpendicularity : 0.1 mm / 200 mm (side face to top face)

Nitriding Layer Thickness : 0.25‑0.35 mm (optional)

Packaging Details : 4000*2000*200mm

Available Material : Q355 Steel, HT300 Cast Iron

Place of Origin : WUXI , CHINA

Payment Terms : L/C,D/A,D/P,T/T

Grid Pitch : 100 × 100 mm ±0.05 mm

Brand Name : WUXI LEMAR

Certification : CE

Hole System : D28 (28 mm bore)

Price : 500-1500 USD

Delivery Time : 15-25 work days

Table Version : 3D 5‑sided / 2D Top‑only optional

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Standard D28 Welding Table with 28mm Bore Diameter
Stop fighting unstable jigs and inconsistent positioning accuracy. Our Standard D28 Welding Table with 28 mm bore diameter is a heavy‑duty 3D modular worktable built to endure daily high‑volume fabrication. Every 28 mm bore is precision reamed for proper pin fit, while the full 5‑sided working design lets you clamp workpieces from nearly any orientation. Stress‑relieved raw material plus optional plasma nitriding defends against welding spatter and premature warping.
Standard D28 Welding Table with 28mm Bore Diameter Standard D28 Welding Table with 28mm Bore Diameter
Key Technical Parameters
Item D28 28mm Bore Standard Parameters
Nominal Bore Diameter Φ28mm, Tolerance D10: Φ28.065~28.149 mm
Hole Grid Pitch 100 × 100 mm ±0.05 mm (Signature 100 mm grid for D28; 50 mm for D16)
Flatness Tolerance ±0.1 mm / 1000 mm (0.1 mm deviation per meter)
Perpendicularity of Side Face to Top Face 0.1 mm / 200 mm
Standard Table Height (3D Version) 200 mm (excluding support stand & legs)
Load Capacity Static: 5‑10 tons (subject to size & material); Dynamic: 2‑3 tons
Manufacturing Process Details
Standard D28 Welding Table with 28mm Bore Diameter Standard D28 Welding Table with 28mm Bore Diameter
  1. Raw Materials and Stress Relief (Crucial for long-term precision)
    Q355 Welded Steel Table: Fabricated from steel plate with a dense grid of reinforcing ribs welded to the underside; undergoes vibratory stress relief to eliminate residual welding stresses. Skipping this step leads to warping and loss of flatness after a period of use.
    HT300 Cast Iron Table: Cast as a single unit using the resin sand process; undergoes annealing followed by dual stress relief (natural and vibratory) to eliminate internal casting stresses. Cast iron offers superior rigidity and vibration damping but is extremely heavy, resulting in high transportation costs.
    Common issues with low-cost tables from small workshops in Botou: Skipping the stress-relief process results in tables that appear precise upon delivery but deform beyond tolerance limits after 3-6 months of use.
  2. Machining
    All five faces are machined in a single setup on a CNC machining center; holes are reamed to ensure a diameter tolerance of Φ28.065-28.149 mm (for D10 holes) and a grid spacing of 100×100 mm (±0.05 mm); hole edges are chamfered for smooth pin insertion and removal; working surface roughness is Ra 3.2-6.3 μm; perpendicularity between side and top surfaces is 0.1 mm/200 mm.
Mounting Hole Structure Details
  • Hole Type: Through-holes (not blind holes); standard D28 holes feature a 45° countersunk chamfer with a diameter of approximately 36mm, facilitating the rapid insertion of locating pins.
  • Hole Walls: Reamed finish (not merely drilled); drilled holes have rough walls, leading to pin jamming, excessive clearance, and poor repeatability in positioning accuracy.
  • Hole Bottom: Open at the underside of the table; welding slag and metal chips fall through freely without accumulating or clogging the holes (enclosing the underside would cause debris buildup).
  • Grid Layout: The standard D28 grid originates from the table corner with a uniform 100×100mm spacing; offset grid patterns are not used.
  • Inferior Welding Tables: Drilled holes instead of reamed ones, missing chamfers, hole-spacing tolerances exceeding ±0.15mm, and fixtures wobbling when positioned across holes.
FAQ
What is your lead‑time and do you provide inspection report?
Standard sizes: 15‑20 working days; custom sizes: 25‑35 working days. Factory inspection report including flatness, hole pitch and bore tolerance can be provided upon request.
What is covered under warranty?
Warranty covers manufacturing defects such as material failure and stress‑relief related permanent warping. Warranty excludes arc‑burn damage, spatter corrosion, impact chipping and normal wear from daily operation.
Can you mark custom reference lines or datum points on the table?
Yes, custom datum marking is available upon request. Please send over your drawing requirements during inquiry, extra lead‑time and small surcharge may apply.
Will welding heat permanently warp the D28 welding table top?
Proper stress‑relieved tables resist permanent warping, yet local temporary thermal distortion still happens under intense welding heat. Use support blocks to lift workpieces off the table surface. HT300 cast iron performs better against thermal influence than steel versions.
Which Incoterms can you offer?
FOB, CFR, CIF are our regular options. We can also support DAP / DDP if you provide your destination port or delivery address.
Got questions about pricing, shipping, document requirement or OEM marking for your D28 welding table project?
Send us your detailed requirements, target trade term and destination country. Our export team will reply with formal PI and full cost breakdown quickly.

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