Often times while applying spray foam, hardened material gets stuck in
the mixing chamber that the purge-air just won’t blow out; in most
cases this happens while applying closed cell foams. When hardened material
is noticed or the pattern from the chamber is unsatisfactory a drill bit
that is sized for the desired chamber is necessary to carefully remove
the hardened material.
Once in a while, and with the necessary cumbersome PPE that is required
for the applicator, a drill bit will break off while drilling the hardened
material from the chamber. If this happens follow these simple steps,
it may save from having to purchase a new chamber.
If there is hardened material still in the chamber at the time the drill
bit broke than it will need to be soaked in solvent for several hours.
- Break two small wires from a wire wheel or brush; make sure that the wires
are approx. 1.5”-2.0” in length.
- Insert each wire into two of the flutes of broken drill bit. Wiggle the
wire as far to the bottom as possible.
Using a pair of pliers, turn the chamber clockwise. This will tighten the
wires into the flutes of the broken drill bit.
Take care not to over-tighten as this could break the wires off in the drill bit.
- Once the wires feel secure gently pull the wire with the pliers and the
broken drill bit should slide out.
NOTE: Although this tip has been successful in many cases, it is only to
help save a chamber that is otherwise thought to be damaged and is in
no way a 100% fix in every case.