Creating Cylinders, To create a cylinder

Creating Cylinders

The Model G5771 Slip Roll can be used to easily and accurately create cylinders.

If you know the diameter of the cylinder you want to create, use the formula below to calculate the length of material needed.

C=πD

C=Circumference

(Length of Material Needed)

π=Pi (Approximately 3.142)

D=Diameter

Example: Suppose you want to create a 6" diam- eter cylinder. You would use the above formula as follows:

C=πD

C=(3.142) x 6"

C=18.852"

The result of 18.852" indicates that you need to start with a piece of sheet metal that is approxi- mately 18.852" in length in order to create a 6" diameter cylinder.

You can use the slip roll to create a bend with the correct radius so that the two ends meet, forming a 6" diameter cylinder (Figure 21).

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Figure 21. Calculating circumference example.

G5771 50" Slip Roll 16 Gauge

Once you have the necessary length workpiece, follow the steps below to create the cylinder.

Note: The method for creating a specific radius is

atrial-and-error process. Due to the many varia- tions among metal workpieces, no single position- ing will create the same curve on all materials. We recommend using scrap pieces the same dimen- sions and material as your final workpiece until the desired curve is achieved.

To create a cylinder:

1.Place the workpiece between the upper and lower rollers, as shown in Figure 22. Turn the thickness adjust knobs to lift the lower roller until the workpiece is held snug between the upper and lower rollers. Be sure to turn the thickness adjust knobs equal amounts.

Figure 22. Raising lower roller.

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