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DRILL
BUSHINGS - Locking Accessories For Renewable
Bushings
TECHNICAL INFORMATION
FOR FAST, ACCURATE MOUNTING OF
MECHANICAL/AIR-FEED DRILLS, TAPPERS AND BACK SPOTFACERS |
| Our
Drill Bushing Tips provide a fast,
accurate method for portable/stationary
mounting of drilling, tapping and other
self-contained machining units on a jig/fixture.
The threaded end of the drill bushing
tip screws into the nose end of the drilling
unit. The helical flanges on the tip fit
under the shoulders of the lock screws/lock
strips on the jig, effectively holding
the drilling unit in alignment position
and absorbing drilling thrust and torque.
Our
Drill Bushing Tips are finished to
order to the drill size specified by the
user. They are available for applications
from No. 70 drill up through 1-15/32"
diameter. |
Our Drill Bushing Tips and Accessories
fit all standard automatic feed drill motors
including Gardner-Denver, Keller, Aro, Buckeye,
Quackenbush, Ingersoll-Rand, etc.
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OUTSTANDING FEATURES |
1
Drill guide hole finished to ANSI specifications/customer's
exact dimensional requirements.
2 Chip clearance hole prevents jam-up
of chips. Chips work back into the nose
piece and out slots in sides of nose piece.
3 Milled slots give quick, positive
lock of drill bushing tip under heads of
lock screws. A 30o turn locks/unlocks the
drill bushing tip.
4 Square shoulder and concentric
alignment diameter accurately line up drill
bushing tip with axis of tool.
5 Collar and threads are heat treated
to produce strength and provide wear resistance.
Shank is hardened for maximum wear resistance.
6 Marked with part number and drill
size for easy identification and simplicity
in reordering.
7 Precision ground shank, with entering
bevel for easy insertion in lock liner bushing.
8 Collar has blackened finish for
resistance to rust and corrosion. |
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| Automatic
mechanical/air-feed drills, tappers
and back spotfacers are equipped
with either a short/a long nose
piece depending upon the length
of the cutting tool holding device
- i.e. drill chuck, tap chuck, morse
taper adaptor, etc. |
Reducer
bushings are occasionally used to
reduce the thread size in a specific
nose piece to adapt it to accommodate
smaller thread drill bushing tips. |
Close
fit between mating shank of tip
and hole in lock liner bushing holds
tool in alignment to produce straight
close-tolerance holes. |
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| Construction:
All drill bushing tips are constructed by
a two--piece method consisting of a collar
and a pressed-in shank. The collar contains
the screw threads, alignment diameter and
the lock flange. The shank contains the
A, B, and dimensions listed in the chart.
Maximum and minimum drill sizes (A) for
drill bushing tips are shown in the column
headings of the chart. Collars/shanks only
of two-piece drill bushing tips may be ordered
separately for replacement purposed: (See
"ordering Information.") |
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| Mounting
data |
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| Conventional
method for mounting automatic, mechanical/air
feed drills, tappers and back spotfacers
to a jig/fixture. A hole is bored
in the jig to accommodate the lock
liner bushing. The lock nuts hold
the lock liner bushing in position
the jig. |
An
alternate mounting method for holes
so closely spaced that lock liner
bushings cannot be used has lock
screws mounted directly in the jig.
The shank of the drill bushings
are available to press into the
bored hole to provide a wearing
surface and prolong the useful life
of the jig. |
A
second mounting method for closely
spaced holes employs a lock strip
along each side of the row of holes
in the jig. The flanges on the drill
bushing tip lock under the extended
edges of the lock strips when the
tip is turned 30 degrees to the
left. Headless liner bushings pressed
into the bored holes in the jig
are recommended to forestall wear
in the bored holes. |
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