Article: If you're cutting copper pipe in a tight space (such as up against a corner), use an autocut tool. Measure the diameter of the pipe you want to cut and purchase an autocut tool for that exact size. Autocut tools are spring loaded so you won't be able to adjust the size of the cut. For example, for a small 1/2 inch (12 mm) pipe, buy a 1/2 inch (12 mm) autocut tool. Autocut tools come in 1/2 inch (12 mm), 3/4 inch (19 mm), and 1 inch (2.5 cm) sizes. Set the pipe into the center of the autocut tool where you'd like to make the cut. Secure the gray clamp down onto the pipe. The pipe should not be able to wiggle or slide out of the tool. Look for the arrow on the tool that indicates which direction to turn it. Hold the pipe with one hand and use your other hand to turn the tool in the indicated direction. Turn the tool 20 to 30 times until the pipe is cut. The auto cut tool makes a clean, smooth cut, so you won't need to clean the pipe before using it.
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Select an autocut tool. Clamp the autocut tool onto the copper pipe. Turn the tool 20 to 30 times.