GR Furnace Arm Creation

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Instructions

GR furnace arm

1. Prepare the furnace arm blank

   Carefully remove any plastic covering of adhesive residue from the surface of the furnace arm blanks

2. Tap the bottom hole

   Use a 6-32 tap to thread the bottom hole of the furnace arm. Ensure the tap is properly aligned to avoid damaging the threads

3. Ream the large hole

   Secure the furnace arm blank in a vise, but do not over-tighten; the blank should be held loosely to allow the reamer to self-center within the hole

   Use an oversized 3/8" reamer in a milling machine to enlarge the large hole

   Set the mill to a slow speed and apply cutting oil to ensure a smooth finish and prevent overheating

   Carefully ream the hole, ensuring the reamer stays centered to avoid damaging the tool or workpiece