Tech Tip - Ever Break a Drillbit in a Mixing Chamber???

Posted By DEMILEC || 30-Apr-2013

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.

Drill bitOnce 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.

  • ToolsIf 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.
Break two small wires from a wire wheel or brush; make sure that the wires are approx. 1.5”-2.0” in length. Using a pair of pliers, turn the chamber clockwise. Once the wires feel secure gently pull the wire with the pliers and the broken drill bit should slide out.
  • 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.

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.

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