Part Numbers for Drillco Carbide Percussion
Drill Bits Used to Install Maxi-Bolt Anchors
Part numbers for Drillco Carbide Percussion Bits used with Maxi-Bolts have the following template:
MCB-Diameter Series-Drill Depth-ZXX
MCB
The designation for a Drillco carbide percussion drill bit which is correctly
sized to install Maxi-Bolt anchors.
Diameter Series
The Diameter Series may be one of the following, depending on the diameter
of the stud bolt of the anchor to be installed:
Diameter Series
Anchor Stud
Bolt Diameter
250
1/4"
375
3/8"
500
1/2"
500H
1/2" Heavy
625
5/8"
750
3/4"
1000
1"
1250
1 1/4"
The diameter of the drill bit is larger than the diameter of the Maxi-Bolt
anchor's stud. They are sized to accomodate the sleeve diameter of the
anchor. Nonetheless, all drills, tooling and accesories are keyed to the
stud bolt diameter of the anchor through the use of these Diameter Series
Designations. See Table I
of the Installation Procedure for drill bit diameters
and tolerances.
Drill Depth
The drilling depth of the bit. Bear in mind that, because the conical nut
on the anchor occupies the bottom of the hole before the anchor is set,
the hole must be drilled deeper than the embedded length of the anchor.
See the third column of Table I
from the Installation Procedure for details.
As a minimum, the Drill Depth should equal the embedded length of the anchor
+ the value from the third column of Table I.
ZXX
Code for the shank style of the carbide drill bit. The codes and their associated shank types
are given in the following table: