| Machine
shops save time with a furnace at their disposal in their own
shop. You will no longer send a die out for heat treating, wait
for its return and then send it out again for additional heat
treating.
Solid construction
The door swings open
with one-handed operation. The LR-PMT-21 furnace is insulated
with refractory firebrick. The elements are mounted in dropped,
recessed grooves machined into the firebrick. We invented
this type of groove in 1952. This groove protects the element
for long life and low maintenance. Elements are simple to
replace because they’re exposed rather than embedded. You can
thread new elements into place following clear instructions in
the manual.
The firing chamber is
protected by a steel case painted in high temperature blue. A
built-in stand lifts the firing chamber safely off your
worktable, so no extra stand is needed. The door is mounted with
a heavy-duty hinge for smooth opening. A micro-switch shuts off
the power to the elements when the door is opened. We use high
temperature wire in the switch box for long life. A heat shield,
mounted between the switch box and furnace, helps keep the
switch box components cool even during extended operation. To
further dissipate heat, the switch box is extra large and
generously louvered. Each furnace comes with a cord and plug for
immediate installation and a one year warranty.
Complete
instructions
Your furnace includes
a wiring diagram, programming instructions, and heat treating
manual. The manual gives you basic heat treating instructions
for D2, 440C, ATS 34 and 154 CM. The manual is written in plain
English for the beginner.
Optional Gas
Injection Flow Meter
During heat treating,
scale forms on the surface of the steel. One way to eliminate
most scaling is to wrap the steel in stainless steel foil. An
easier way is to install the gas injection flow meter on your
furnace. It is available as either an add-on kit, or you can
order the furnace with the meter installed.
The meter regulates
the flow of an inert gas, such as argon, inside the furnace. The
gas displaces the oxygen to prevent most scaling.
|
