Armor Mill and Armor Drill for broken tap removal.
Armor Mill
Use when the tap or drill is broken off below the surface of the workpiece or when the broken tap or drill has an uneven top surface that would cause the Armor Drill tip to walk or deflect.|
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| If possible, use a punch to make the top surface of the broken tap/drill flat before drilling. | Drill at 1,200-2,500 RPM. Feed extremely slow (especially when first contacting uneven surface). |
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Order Armor Mills - here
Armor Drill
Use when the tap or drill is broken off above the surface of the workpiece or when the broken tap or drill has a flat top surface that will not cause the drill tip to walk or deflect.|
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| Remove excess drill/tap material to create as flat a surface as possible. | Spot drill the broken tap with the largest dia. Armor Drill. Drill at 1,200-2,500 RPM. | Drill down through the broken tap. Use coolant if possible, peck and flush out chips with air blast. Remove remnants of broken tap with pick. |
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Order Armor Drills - here
It is recommended that both the Armor Drill and Armor Mill tools be used in rigid machines (machining centers, kneemills, lathes) with the parts held securely. Using the hand wheel at the lowest speed, feed very slowly and keep a steady feedrate. Peck or stop frequently to remove chips from the hole. If the part needs to be drilled with a hand drill, operate the drill at faster rpms, use a strong, steady force, and keep the drill as straight as possible. It is important to prevent the tools from walking or deflecting, especially when first contacting the uneven part surface.
As with all machining, it is necessary to take appropriate safety precautions.
End Mills, Cutting Tools, Chamfering Tools, Broken Tap Removal Tools