The setting up instructions recommend setting both regulators at 5.
Is it safe and would it be helpful to set the Oxygen higher, and
the the acetylene somewhat lower, or some other arrangement.
Someone mentioned using a 6 or 7 tip--would that help? I would
The little torch’s limitations are due simply to the small size of
the tips. Those only form a narrow gas stream, and only allow a
certain limited amount of gas to flow, thus smaller sized flames. The
largest tip possible will give larger flame sizes, but even then,
it’s a rather small but hot flame with oxy/acetylene. You can work
silver with it on a smaller scale, of course, but you simply can’t
get a big soft brushy flame that will envelope larger areas of metal
unless you’ve got a torch that can both allow a higher gas flow
(usually needs larger diameter hoses, as well as bigger tips). Now,
you can increase gas flow to an extent by increasing the regulator
pressures (both fuel and oxygen). But do that more than a little, and
what happens is simply then the flames blow out.
Note that you can, in addition to using the commercially made tips,
modify existing tips to increase the size of the orifice up to the
size of the main tubing bore. Simply cut off the end of a small tip
(such as the almost useless #1 tip, too small for most jewelry use
(though not all. If you work very delicate wires, it’s useful. Also
good for polishing waxes…) Removing that ruby ended tip leaves you
with a larger bore tip. Or just drill out the bore on a larger tip to
the same inside diameter as the tube near it’s base. Tips modified
like that give larger flames. But they also can tend to burn back
sometimes (the flame popping and burning back into the tip or torch
body briefly. Not a major problem, but can be a surprise… That
happens mostly when lighting or turning off the torch. Also, the
multi orifice rosebud tip might be useful as well for larger areas.