Nortel Unitorch-12: the twelve-tip premix hand torch for scientific and lathe work

The Nortel Unitorch-12 is a premix hand torch with twelve stainless-steel tips, part of Nortel’s Unitorch family and aimed squarely at scientific glassblowing: Nortel lists the Unitorch hand torches for lathe work, dewars, fritted discs, round bottoms, ring seals, graded seals, glass-to-metal seals, and flame cutting, and says they easily work 40 mm quartz or 75 mm borosilicate standard-wall tubing.

What the Unitorch-12 is

It is a premix torch: fuel and oxygen are mixed inside the body before reaching the flame, which makes the flame simple to light, stable, and predictable, exactly what long seal-making sessions on a lathe demand. The tips are the heart of the design, since flame size and character come from the installed tip rather than a fixed port array. See surface mix vs premix torches for the mixing background, bench vs hand torch for the format, and glass lathes for the machine most of this work happens beside.

Construction

Nortel specifies a stainless-steel manifold and nozzle tubes carrying the twelve stainless-steel tips, and puts the torch at about 2 lb. For a hand tool that gets held through long lathe sessions, that weight matters as much as the flame does.

Where it sits in the Unitorch family

Our catalog carries three Unitorch hand torches, and they differ by tip count rather than by class: the six-tip Unitorch, the nine-tip Unitorch-9, which runs roughly 20 inches long so the operator can stand back from an intense narrow band of fire, and this twelve-tip version. Every other field in the three records matches: premix, hand-held, borosilicate and quartz, propane or natural gas, intermediate to advanced. The stated tubing capability is identical too, 40 mm quartz or 75 mm boro standard-wall. More tips therefore does not buy a larger published maximum, it buys more flame along the length of the work; choose by the length of joint you need hot at once.

Fuel and oxygen

Our catalog lists propane or natural gas on the fuel side, run with oxygen; propane vs natural gas for torchwork covers that choice.

We record no oxygen figure for any of the three Unitorch torches, and that is a deliberate blank rather than a gap we would fill with a guess: on a tip-based torch the flame is set by the installed tip, so one LPM number would describe one tip and mislead about the rest. Size the supply for the largest tip you actually run, using the method in how many LPM does my torch need, and set the torch up with the flashback protection it and your gas supply call for (flashback arrestors explained covers why that answer changes from maker to maker).

Who the Unitorch-12 is for

Our catalog marks it intermediate to advanced and lists it for borosilicate and quartz; soft glass does not appear in its record at all. For scientific or lathe work, sealing, or flame cutting on quartz and boro tubing, it belongs in the conversation alongside the six-tip Unitorch. For a first torch for beads or general studio work, the best beginner glass torch guide is a better starting point.

What we do not know

Nortel does not list a price for the twelve-tip version on the page we work from, and our catalog carries a reference price only for the six-tip torch, so budget from a current quote. We record no jet count for it either, on purpose: the twelve tips are interchangeable rather than fixed flame ports, so a port total would be the wrong shape of fact. There is no stage count and no pressure figure we can cite either; the instructions that ship with the torch govern, and we do not estimate pressures. Confirm the current configuration, tip set, and price with Nortel before buying.