GTT Ninja: a compact three-stage, 72-jet Triple Mix production torch

The GTT Ninja is one of Glass Torch Technologies’ three-stage production burners — a 72-jet Triple Mix torch built around a 7-jet Lynx center, a 15-jet Phantom middle, and a 50-jet outer fire. It’s sized between the Kobuki and Delta Mag, but its calling card is a compact body that’s easy to work behind — a lot of heat without a lot of torch in your way. It’s aimed at fast melt-ins and production, and it can be ordered with GTT’s compressed-air path.

What the three-stage Triple Mix flame gives you

Triple Mix is GTT’s surface-mix technology: fuel and oxygen meet at the face of the torch, keeping the mixing chamber cool and giving a clean, penetrating flame that drives heat into the core of thick glass — which is what large boro and fast melt-ins demand. Three stages let you keep a fine center flame available while having a big soaking flame on tap. For the underlying tech see GTT Triple Mix technology and surface mix vs premix torches; for why penetration matters here, read soaking vs penetrating flame.

The compressed-air option

The Ninja can be ordered with GTT’s compressed-air path, which injects air into the fuel system so you can lower flame temperature while keeping the same flame chemistry and flame type. It’s a useful lever for tuning the flame without otherwise changing how the torch behaves. The full explanation is in GTT compressed air & 4-Way Mix.

Who the Ninja is for

The Ninja suits advanced makers and production studios who want big-torch heat and fast melt-ins but value a compact body they can work close behind. It isn’t a soft-glass bead torch and it isn’t a beginner’s first burner.

Glass, fuel, and oxygen

The Ninja burns propane or natural gas with oxygen and runs both boro and soft glass, with its center of gravity firmly in large boro. As a three-stage production torch its oxygen demand is high — realistically tanked oxygen or multiple concentrators. GTT doesn’t publish the Ninja’s exact LPM, so size your oxygen to your work and confirm with GTT. Start with how many LPM does my torch need.

Where it sits in the GTT lineup

The Ninja slots between the Kobuki and Delta Mag among GTT’s three-stage production torches, and it’s a close sibling of the Samurai — same 72-jet, three-stage idea, but with the jets distributed differently (the Ninja runs a Phantom middle and 50-jet outer; the Samurai a Mirage middle and 32-jet outer). All are built on the same Lynx center, so the flame behavior is familiar across the line.

Before you buy

Budget for the whole system, not just the torch: an oxygen supply sized to a three-stage production torch, the correct propane or natural-gas regulator (plus an air source if you take the compressed-air option), flashback arrestors on both lines, didymium eyewear, and serious ventilation. New to plumbing a torch this size? Start with the fittings, hoses & connectors guide and the glass torch safety setup guide.

Editor’s note: spec details reflect GTT’s own materials. GTT doesn’t publish the Ninja’s exact oxygen flow (LPM) or current pricing, so confirm those specifics with GTT before purchasing.