Single-V or X Bevel? Choosing an Automatic Walk-behind Plate Beveler for 6-40 mm Steel Plate

Where the joint choice changes

Steel structure, pressure vessel and shipbuilding shops make the same call on every butt joint, and it decides which steel plate beveling machine they need. A single-V groove is welded from one side, but its volume grows with the square of plate thickness. A symmetric X groove splits the depth across both faces, roughly halving groove area and balancing heat input, so the plate distorts less. Shops usually switch to X or K grooves above about 25 mm; the welding procedure specification (WPS) has the final word.

Table 1 – Typical joint by plate thickness

Two walk-behind models, two jobs

The GBM-12D is an automatic walk-behind plate beveler for 6-30 mm steel plate. It clamps on plate thickness, drives itself along the edge on walking wheels and shears a 25-45 degree bevel with one solid cutter at 1.5-2.6 m/min, the fastest feed in the GBM series. That suits long V and Y edges on beams, columns, tank plates and general steel structure work.

The GBM-16D-R steps up to 9-40 mm plate with a 1500 W drive and a 115 mm cutter, giving up to 16 mm bevel width per pass and 28 mm in total at 1.2-2.0 m/min. The R version also cuts the bottom bevel, which X and K joints need on thick shell plates, ship hull butts and box girders.

Both models cold-cut the edge with no oxide layer, so the bevel goes straight to fit-up. Feed small plates on the bench, or let the machine walk large plates on a 700 mm support table. For 4-16 mm plate, see our portable automatic plate beveler.

			https://www.bevellingmachines.com/gbm-12d-metal-plate-beveling-machine.html
			https://www.bevellingmachines.com/gbm-16d-r-double-side-bevel-cutting-machine.html

Table 2 – Configuration: GBM-12D vs GBM-16D-R

Buyer FAQ

Factory-direct configuration