Subland Drill (2-2)
Available In:
High Speed Steel, Carbide Tipped, Solid Carbide.
Description
A Subland Drill (2-2) is basically two drills of different diameters
combined into one tool but retaining the individual characteristics
and proper geometry of each. The independent flutes and margins
of a Subland Drill ensure that size and concentricity between
diameters is maintained throughout the life of the tool and are
never effected by resharpening the point or step angles.
Applications
The Subland Drill (2-2) eliminates secondary operations by drilling
multi-diameter holes in one production pass.On certain applications
particularly holes in steel or cast iron, the subland drill (2-2)
provides superior tool life compared to that of a basic step
drill of the same diameters. When drill bushings are used and
subject to material being cut, 'Double Margins' can be supplied
at no extra cost. The additional margins will give maximum support
and guidance to provide more accurate size and hole location
control.
Limitations
Subland Drills are not practical when the small diameter is less
than 50% of the large diameter. Depth of the hole should not
exceed 4 times the small diameter but greater hole depth can
be achieved by withdrawing the tool to clear chips.
Subland Drill (2-2-2)
Available In:
High Speed Steel, Carbide Tipped, Solid Carbide
Description:
A Subland Drill (2-2-2) is basically three drills of different
diameters combined into one tool, yet retaining the individual
characteristics and proper geometry of each. The independent
flutes and margins of the sublands means that concentricity between
diameters is ensured throughout the life of the tool and is never
affected by resharpening the point and step angles.
Applications:
The Subland Drill (2-2-2) eliminates secondary operations by drilling
multi-diameter holes in one production pass. On certain applications
particularly when drilling three diameter holes in steel or cast
iron, the subland drill (2-2-2) provides superior tool life compared
to that of a basic stepped drill of the same diameters.
Limitations:
This tool type is not recommended when the small diameter is less
than 60% of the large diameter. Depth of hole should not exceed
3 times the smallest diameter but greater depth can be achieved
by withdrawing the tool to clear the chips. |
