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Die-Cutting Basics

The process of cutting a thread on the outside of a round piece of metal is known as die cutting. This method may be used to rethread an old carriage bolt.

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  • Time

    30 Minutes

  • Price Range

    $1 - $50

  • Difficulty



Step 1: Clamp the Bolt

Clamp the carriage bolt with a vise (Image 1). Use a file to cut a 30-degree angle off the top of the bolt (Image 2). This will help get the die started in cutting the threads.

Step 2: Position the Die

Place the die in the center of the die stock, and tighten it into place. Position the die over the bolt, holding the die stock perpendicular to the bolt.

rotate tap with tap wrench

Step 3: Turn the Die Stock

Applying downward pressure, turn the die stock clockwise one or two turns. Remove the die and die stock. Brush away the metal chips, and repeat the process as needed to carve the desired amount of threads. Do not apply downward pressure after the first few threads are formed.

turn tap wrench clockwise to rotate tap

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