gauge material, the cutters should be slightly separated.
These adjustments should be made according to the
instructions furnished by the manufacturer.
To cut a ring or a flange using only hand tools and
a slitting shear or bench shear, follow the procedure
shown in figures 12-64, 12-65, and 12-66.
Figure 12-63.--Cutting a disk with the ring-and-circle shear.
The cutting of a disk with the ring-and-circle shear
is shown in figure 12-63. To make a flange or ring, cut
a disk in the manner just described. Then adjust the
sliding circle arm to the new radius required for the
inner circle. Make the inner cut by the same procedure
used for the outer circle.
Figure 12-65.--Drilling holes around inner circumference.
The ring-and-circle shear can also be used to cut
straight or irregular curved sections as well as disks and
rings. To cut light gauge material, the rotary cutters
should be set to just touch, but not rub. To cut heavier
Figure 12-64.--Cutting outside of a circle with slitting or
Figure 12-66.--Dressing the ring to final shape.