model t23034 (mfg. since 6/10)
-17-
creating cylinders
the model t23034 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=
π
D
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=
π
d
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). remember
that any material required for a fold or seam at the
ends must be added to the circumference
18.852" Circumference
Workpiece
6" Dia.
C=
D
C=(3.142) x 6"
C=18.852
figure 21.
Calculating circumference example.
once you have the necessary length workpiece,
follow the steps below to create the cylinder.
Note:
The method for creating a specific radius is
a trial-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 top and bot-
tom rollers, as shown in
figure 22. turn the
thickness adjust knobs to lift the bottom roller
until the workpiece is held snug between the
top and bottom rollers. Be sure to turn the
thickness adjust knobs equal amounts.
CW
figure 22. raising bottom roller.
