Showing posts with label cut. Show all posts
Showing posts with label cut. Show all posts

Saturday, March 29, 2014

How to Cut Stainless Tubing Straight

How to Cut Stainless Tubing Straight

When cutting stainless steel tubing, you must ensure that the cut end of the stainless tubing is straight. If the cut is crooked, the end that you cut will not fit squarely into a stainless steel fitting or butt up tight to another piece of pipe for a weld joint. The tools required to mark a straight cut on the stainless steel tubing are relatively simple, readily available and inexpensive. Selecting the proper tool to cut the squarely marked tubing is vital to ensuring that the cut is straight.

Instructions

    1

    Stretch the tape measure along the stainless steel tubing and mark the length you need to cut with a permanent marker.

    2

    Place the marked length of tubing into a table-mounted vise. Slide the length mark 12 inches past the end of the vise and turn the handle of the vise clockwise to secure the tubing.

    3

    Fold an 8 1/2-inch by 11-inch piece of paper into a two-inch-wide strip that is 11 inches long.

    4

    Align one side of the folded paper with the length mark you placed on the stainless steel tubing. Wrap the paper around the tubing and pinch the ends of the paper together. When the edges of the folded paper are even, the paper line is straight.

    5

    Run the permanent marker around the edge of the folded paper, marking a straight line around the stainless steel tubing. Remove the paper from the tubing.

    6

    Attach a .032 abrasive cut-off wheel to a four-inch grinder.

    7

    Put on your safety glasses, face shield and leather work gloves.

    8

    Cut 1/4 of the circumference of the stainless steel tubing, pressing the cutting wheel slowly along the cut mark.

    9

    Loosen the table vise, spin the tubing 1/4 of a turn and tighten the vise. Continue cutting the tubing.

    10

    Replace the abrasive cut-off wheel when it wears to the cutting line, or roughly 60 percent of the cut-off wheels original diameter.

    11

    Complete the cutting process and set the grinder aside. Run a fine-tooth half-round file around the inside and outside of the cut to remove sharp burrs left by the cutting wheel.

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Sunday, November 17, 2013

How to Cut Hardened Steel

How to Cut Hardened Steel

The bladed cutting tools used to cut mild steel do not have the ability to cut through hardened steel. The problem results from the hardened steels having a harder structure than the cutting blade. This results in the teeth stripping from the blade and its losing its ability to cut. One cutting method uses a hand tool equipped with a nonmetallic blade to overcome the issue of blade dulling. This reduces the amount of time and material needed to produce the cut.

Instructions

    1

    Clear all flammable debris from the work area. Set a fire extinguisher near a vise. Secure a piece of hardened steel in the jaws of the vise. Ensure that the cut area of the steel sits beyond the end of the vise jaws.

    2

    Attach an abrasive cutting disk to an angle grinder. Don a pair of safety glasses, a face shield and a pair of sturdy leather gloves.

    3

    Set the edge of the abrasive cutting disk 1/8 inch from the surface of the hardened steel. Press the trigger of the angle grinder. Lower the spinning grinding disk to the surface of the hardened steel. Push the grinder along the hardened steel without placing excessive downward pressure on the grinding disk. Move the grinder back and forth along the steel until you complete the cut.

    4

    Allow the cut area to cool for 10 minutes. Remove the cut hardened steel from the vise.

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Wednesday, October 23, 2013

How to Cut a Steel Auto Fuel Line

Vehicle fuel systems operate under high pressure. Steel fuel lines keep high-pressure fuel contained on route between the fuel tank and the fuel delivery system. Correctly installing steel fuel lines entails producing straight cuts on the ends of the line. This ensures the lines will seat properly in the compression fitting connecting two pieces of line or connecting the line to fuel system components. Improperly cut fuel lines create a situation where fuel can escape from a crooked edge.

Instructions

    1

    Mark the cut location on a piece of steel fuel line with a piece of soapstone.

    2

    Open the jaws of a tubing cutter by turning the lower knob counterclockwise. Stop turning the knob when the distance between the top rollers and the bottom cutting blade allows enough room for the steel fuel line.

    3

    Slide the fuel line in the open jaws of the tubing cutter. Align the cut mark with the center of the bottom cutting blade. Turn the cutter knob clockwise until the blade contacts the surface of the tube. Turn the knob clockwise a quarter turn to apply pressure to the line.

    4

    Spin the tubing cutter around the fuel line for two revolutions. Turn the knob clockwise a half turn. Spin the cutter an additional two revolutions. Continue tightening and spinning the tubing cutter until it cuts through the steel fuel line.

    5

    Place the tapered end of the burr remover -- located on the back face of the tubing cutter -- inside the cut end of the fuel line. Apply pressure toward the fuel line. Turn the tubing cutter to clear the burr from inside the fuel line.

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