GTT Scorpion Glass Torch

The GTT Scorpion is Glass Torch Technologies’ two-stage workhorse: the 5-jet Cricket center fire inside an 8-jet outer fire, 13 jets in the standard version, offered in 2- and 4-stud configurations. GTT also sells a Lynx-center Scorpion as a separate product, which puts the patented Triple Mix pinpoint flame at the center and makes 15 jets. The outer fire uses GTT’s patent-pending surface-mix jet design, which GTT says makes the flame size of larger torches with fewer jets. It scales from a 2in pinpoint up to a 1.25in x 16in flame for solid boro to 3in, and GTT claims it melts through 3/4in solid boro rod in about a minute. On oxygen, GTT’s page lists one 10 LPM concentrator or two 5 LPM units, with two 8 LPM units or tanked oxygen as optimal; the page states 11 LPM (22 CFH) at maximum flame while GTT’s Flow Rate Chart lists 20 CFH (about 9.5 LPM), so size for the higher figure. Fuel runs from 1/4 to 5 psi of natural gas or propane at about 1.5 LPM (3 CFH) at the largest flame.

What the two-stage design gives you

Both stages are surface mix, fuel and oxygen meet at the torch face, keeping the flame clean, quiet, and kind to colors. The center fire handles detail; opening the outer fire adds a broad, penetrating band of heat for wide beads and heavy boro. Whether the center is the standard Cricket or the Triple Mix Lynx of the separately sold Lynx-center version, the 8-jet outer fire is the same. For the technology background see GTT Triple Mix technology and surface mix vs premix torches; for why a penetrating flame matters on heavy boro, read soaking vs penetrating flame.

Who the Scorpion is for

The Scorpion suits makers who have outgrown a single-stage torch and want one burner that covers detail through 3in solid boro, without the oxygen bill of a true production torch. GTT notes it works soft glass and borosilicate with ease, which makes it a genuine all-rounder rather than a boro-only specialist.

Glass, fuel, and oxygen

The Scorpion burns propane or natural gas with oxygen. GTT’s Flow Rate Chart has a single Scorpion row and does not say which center fire it was measured with; measured on propane at the largest usable flame, it lists fuel at 1/4 to 5 psi and oxygen at 5 to 15 psi. That 1/4 psi floor is about what an unboosted household natural gas line delivers, and GTT torches on natural gas covers the roughly 2.5 times larger volume natural gas burns and when a booster comes in. Size your supply to the largest flame you actually use, not the smallest: start with how many LPM does my torch need.

Where it sits in the GTT lineup

The Scorpion is the bridge between GTT’s single-stage torches and the bigger multi-stage burners. Below it sit the single-stage Cricket (its standard center fire), the Bobcat and the Lynx (the center of the separate Lynx-center version); above it, the Sidewinder adds a bigger outer fire, and the multi-stage Phantom and Mirage scale toward production work.

What GTT sells

GTT’s Scorpion pages are inconsistent, so this is exactly what they show. Prices are as GTT’s own pages showed them on 2026-10-06; they change, so confirm with GTT.

For the Cricket-center torch, GTT gives a flame from a 2 inch pinpoint to 1.25 inches wide by 16 inches, solid borosilicate up to 3 inches, and melting through 3/4 inch rod in about a minute. It recommends one 10 LPM or two 5 LPM concentrators, with two 8 LPM concentrators or tanks as optimal, and lists maximum use as 11 LPM (22 CFH) of oxygen and 1.5 LPM (3 CFH) of fuel, where the Flow Rate Chart gives 20 CFH of oxygen and 4 CFH of fuel. Its instruction sheet sets tank fuel at 5 psi, natural gas at a minimum of 1/2 psi and tank oxygen at 5 to 10 psi. The torch uses B fittings, and custom color adds $30 and 2 to 3 days. GTT gives no delivery date and notes that material availability can delay torches.

Before you buy

Budget for the whole system, not just the torch: oxygen supply, the correct propane or natural-gas regulator, flashback protection matched to your torch and gas supply, didymium or boro-rated eyewear matched to your glass, and ventilation. New to plumbing a torch? Start with the fittings, hoses & connectors guide and the glass torch safety setup guide. On the torch itself, GTT’s servicing page states a one-year warranty against factory defects that does not cover damage from improper use, misuse, or neglected maintenance; if you’re buying used, work through the used GTT torch checklist.

Editor’s note: spec details reflect GTT’s published materials (jet counts, flame sizes, concentrator guidance). The standard Scorpion (Cricket center, 13 jets) and the Lynx-center Scorpion (15 jets) are separate GTT products, and the price shown on this page is GTT’s listing for the Lynx-center version, so confirm the center fire, stud count, and current pricing with GTT before purchasing.