What Is the Standard Hole Spacing for a Modular Welding Table

The standard hole spacing(center‑to‑center)for modular welding tables is 50 mm(2 in)and 100 mm(4 in).These are the two most common grid patterns used globally.

Metric Standard(Europe/Asia)

100 mm×100 mm grid(most common for heavy‑duty,industrial systems)

Hole diameter:28 mm(D28 system)

Used on large,high‑capacity tables

50 mm×50 mm grid(for precision,small‑part fixturing)

Hole diameter:16 mm(D16 system)

Higher density for finer positioning

Imperial Standard(North America)

2 in×2 in(50.8 mm)grid

Hole diameter:5/8 in(≈15.9 mm)

Equivalent to the metric 50 mm system

Key Notes

The 100 mm(4 in)spacing is often called the universal standard for modular welding tables.

Spacing is always center‑to‑center,not edge‑to‑edge.

Tables are designed so accessories(locating pins,clamps,blocks)are interchangeable across brands using the same grid.

GB/T7714:Do M D,Son Y,Choi H J.Optimal workpiece positioning inflexible fixtures for thin-walled components[JJ.Computer-Aided Design,2018,95:14-23.

MLA:Do,Minh Duc,Younghoon Son,and Hae-Jin Choi."Optimalworkpiece positioning in flexible fixtures for thin-walledcomponents."Computer-Aided Design 95(2018):14-23.

APA:Do,M.D.,Son,Y.,&Choi,H.J.(2018).Optimal workpiecepositioning in flexible fixtures for thin-walled components.Computer-Aided Design,95,14-23.