MONTAGE PORTATIF D'USINAGE

PORTABLE MACHINING ASSEMBLY

Abrégé anglais

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" PORTABLE MACHINING ASSEMBLY"
ABSTRACT OF THE DISCLOSURE
A portable machining assembly for machining parts
in situ, in order to avoid disassembly which is often extreme-
ly difficult and time consuming. A hydraulic motor drives a
tool bar via a gear box with the tool bar being supported for
rotation within bearings and being slidable relative to the
drive gear by means of a hydraulic piston and cylinder assem-
bly extending from the gear box casing. One or more universal
attachment block assemblies are secured to the device and can
be detachably secured to the structure upon which work is be-
ing done, thus enabling the device to be aligned, centered
etc. prior to machining by a tool detachably secured in the
tool bar. Alternatively the device can readily be adapted for
use as a surfacing tool or the like.

Revendications

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WHAT I CLAIM AS MY INVENTION:
(1) A device for carrying out various machining
functions in situ on equipment such as boring, resurfacing,
grinding and the like; comprising in combination with a source
of power, a tool bar rotatable by said source of power, tool
holding means on said tool bar, a bearing assembly mounting
said tool bar for rotation by said source of power, at least
one universal attachment block assembly securable to said de-
vice and being detachably securable to the equipment being
worked upon, said universal attachment block assembly position-
ing said tool bar in the desired planes for the machining
function desired.
(2) The device according to Claim 1 which includes
support structure supporting said source of power and a gear
box operatively connected between said source of power and
said rotatable tool bar.
(3) The device according to Claim 1 which includes
means to move said tool bar lengthwise relative to said bear-
ing assembly for positioning said tool bar relative to the machin-
ing function being carried out.
(4) The device according to Claim 2 which includes
means to move said tool bar lengthwise relative to said gear
box for positioning same relative to the machining function be-
ing carried out.
(5) The device according to Claim 1 in which said
universal attachment block assembly includes a multiapertured

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block including at least two apertures extending through said
block at right angles to one another but with the longitudinal
axes of each aperture being spaced apart from one another, a
first member slidably and rotatably mounted within one of said
apertures for detachable securement by one end thereof to said
device and a second member slidably and rotatably mounted with-
in the other of said apertures for detachable securement by one
end thereof to the equipment being worked upon and clamp means
in said block for detachably clamping each of said members in-
dependently in the desired relationship relative to said block.
(6) The device according to Claim 2 in which said
universal attachment block assembly includes a multiapertured
block including at least two apertures extending through said
block at right angles to one another but with the longitudinal
axes of each aperture being spaced apart from one another, a
first member slidably and rotatably mounted within one of said
apertures for detachable securement by one end thereof to said
device and a second member slidably and rotatably mounted with-
in the other of said apertures for detachable securement by one
end thereof to the equipment being worked upon and clamp means
in said block for detachably clamping each of said members in-
dependently in the desired relationship relative to said block.
(7) The device according to Claim 3 in which said
universal attachment block assembly includes a multiapertured
block including at least two apertures extending through said
block at right angles to one another but with the longitudinal
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axes of each aperture being spaced apart from one another, a
first member slidably and rotatably mounted within one of said
apertures for detachable securement by one end thereof to said
device and a second member slidably and rotatably mounted with-
in the other of said apertures for detachable securement by one
end thereof to the equipment being worked upon and clamp means
in said block for detachably clamping each of said members in-
dependently in the desired relationship relative to said block.
(8) The device according to Claim 4 in which said
universal attachment block assembly includes a multiapertured
block including at least two apertures extending through said
block at right angles to one another but with the longitudinal.
axes of each aperture being spaced apart from one another, a
first member slidably and rotatably mounted within one of said
apertures for detachable securement by one end thereof to said
device and a second member slidably and rotatably mounted with-
in the other of said apertures for detachable securement by one
end thereof to the equipment being worked upon and clamp means
in said block for detachably clamping each of said members in-
dependently in the desired relationship relative to said block.
(9) The invention according to Claim 3 in which said
means to move said tool bar lengthwise relative to said bearing
assembly includes a hydraulic piston and cylinder assembly in-
cluding a piston rod, the piston rod of said piston and cylin-
der assembly being secured by one end thereof to one end of
said tool bar whereby extension and retraction of said piston

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and cylinder assembly extends and retracts said tool bar
lengthwise relative to said bearing assembly.
(10) The invention according to Claim 4 in which
said means includes a hydraulic piston and cylinder assembly
including a piston rod, the piston rod of said piston and cy-
linder assembly being secured by one end thereof to one end of
said tool bar whereby extension and retraction of said piston
and cylinder assembly extends and retracts said tool bar
lengthwise relative to said gear box.
(11) The device according to Claim 4 in which said
means includes a keyway formed along the length of said tool
bar operatively connecting said tool bar to said gear box for
lengthwise movement of said tool bar relative to said gear box
and a hydraulic piston and cylinder assembly mounted upon said
gear box and being operatively connected to said tool bar
whereby extension and retraction of said piston and cylinder
assembly extends and retracts said tool bar relative to said
gear box.
(12) The device according to Claim 8 in which said
means includes a keyway formed along the length of said tool
bar operatively connecting said tool bar to said gear box for
lengthwise movement of said tool bar relative to said gear box
and a hydraulic piston and cylinder assembly mounted upon said
gear box and being operatively connected to said tool bar
whereby extension and retraction of said piston and cylinder
assembly extends and retracts said tool bar relative to said

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gear box.
(13) The invention according to Claim 1 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
within said main bearing plate, a lower steady rest assembly
supported by said guide bars spaced below said bearing assembly
and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing.
(14) The invention according to Claim 2 in which
said supporting structure includes an upper main bearing plate
and a lower mounting plate, a plurality of guide bars extend-
ing between said plates and mounting same in spaced apart
parallel relationship one with the other, said bearing assem-
bly being supported within said main bearing plate, a lower
steady rest assembly supported by said guide bars spaced below
said bearing assembly and a steady rest bearing in said steady
rest assembly, a cutter head mounted on the lower end of said
cutter bar, said cutter bar being supported for rotation with-
in said bearing assembly, said cutter head being supported for
rotation within said steady rest bearing.

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(15) The invention according to Claim 3 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
within said main bearing plate, a lower steady rest assembly
supported by said guide bars spaced below said bearing assembly
and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing, said steady rest assembly being supported
for sliding movement along said guide bars as said tool bar is
moved lengthwise relative to said bearing assembly.
(16) The invention according to Claim 4 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel rela-
tionship one with the other, said bearing assembly being sup-
ported within said main bearing plate, a lower steady rest as-
sembly supported by said guide bars spaced below said bearing
assembly and a steady rest bearing in said steady rest assem-
bly, a cutter head mounted on the lower end of said cutter bar,
said cutter bar being supported for rotation within said bear-

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ing assembly, said cutter head being supported for rotation
within said steady rest bearing, said steady rest assembly
being supported for sliding movement along said guide bars
as said tool bar is moved lengthwise relative to said bearing
assembly.
(17) The invention according to Claim 5 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
within said main bearing plate, a lower steady rest assembly
supported by said guide bars spaced below said bearing assembly
and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing.
(18) The invention according to Claim 6 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
within said main bearing plate, a lower steady rest assembly
supported by said guide bars spaced below said bearing assembly

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and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing.
(19) The invention according to Claim 7 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
within said main bearing plate, a lower steady rest assembly
supported by said guide bars spaced below said bearing assembly
and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing, said steady rest assembly being supported
for sliding movement along said guide bars as said tool bar is
moved lengthwise relative to said bearing assembly.
(20) The invention according to Claim 8 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported

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and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing, said steady rest assembly being supported
for sliding movement along said guide bars as said tool bar is
moved lengthwise relative to said bearing assembly.
(21) The invention according to Claim 9 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing, said steady rest assembly being supported
for sliding movement along said guide bars as said tool bar is
moved lengthwise relative to said bearing assembly.
(22) The invention according to Claim 10 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported

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and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing, said steady rest assembly being supported
for sliding movement along said guide bars as said tool bar is
moved lengthwise relative to said bearing assembly.
(23) The invention according to Claim 11 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported
and a steady rest bearing in said steady rest assembly, a cutter
head mounted on the lower end of said cutter bar, said cutter
bar being supported for rotation within said bearing assembly,
said cutter head being supported for rotation within said
steady rest bearing, said steady rest assembly being supported
for sliding movement along said guide bars as said tool bar is
moved lengthwise relative to said bearing assembly.
(24) The invention according to Claim 12 which in-
cludes supporting structure for said device, said supporting
structure including an upper main bearing plate and a lower
main bearing plate, a plurality of guide bars extending between
said plates and mounting same in spaced apart parallel relation-
ship one with the other, said bearing assembly being supported

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and a steady rest bearing in said steady rest assembly, a cut-
ter head mounted on the lower end of said cutter bar, said cut-
ter bar being supported for rotation within said bearing as-
sembly, said cutter head being supported for rotation within
said steady rest bearing, said steady rest assembly being sup-
ported for sliding movement along said guide bars as said tool
bar is moved lengthwise relative to said bearing assembly.

Description

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"PORTAsLE MACHINING ASSEMBLY"
BACKGROUND ~F THE INVENTION
This invention relates to new and useful improve-
ments in machining assemblies, particularly machining assem-
blies which are portable and can be taken to the equipment
being worked upon rather than having to disassemble the equip-
ment.
When it is desired to machine apertures, bores, sur-
faces or the like in relatively heavy-duty machinery such as
road maintenance equipment, earth moving equipment, heavy~duty
mining equipment and the like, for repair purposes, it is
normal for the parts to be disassembled and taken to a machine
shop whereupon for example, the aperture may be bored out fur-
ther so that a replacement sleeve can be engaged therein or
1~ the worn part of the aperture can be filled with replacement
metal whereupon once again, it is bored out to the desired
dimensions.
Disassembling such heavy~duty equipment is often ex-
tremely time consuming and sometimes~practically imposslble
without the use of a cutting torch. Furthermore the parts
then have to be shipped to a machine shop, mounted within the
necessary equipment and the machining operation carried out.
Some of the parts are extreme].y heavy and bulky and only a few
machine shops may have the necessary equipment to carry out
such work.
~s an example which is not to be considered limiting,
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a heavy-duty articulated vehicle often consists of ~wo parts
hinged together by means of a coupling engaged between upper
and lower coupling plates with a vertical hinye pin engaging
apertures within the coupling and through the coupling plates.
These often become worn in use and constitute a difficult re-
pair operation when conventional equipment and methods are used.
SUMMARY OF THE INVENTION
The present invention overcomes disadvantages inher-
ent with much repair work required on heavy-duty equipment by
providing a universal and portable machining assembly which is
- readily transported to the site so that the machining opera-
tions can be carried out in situ rapidly and easily and with
practically no disassembly being required.
In accordance with the lnvention there is provided a
device for carrying out various machining functions in situ on
equipment such as boring, resurfacing, grinding and the like;
comprising in combination with a source of power, a tool bar
rotatable by said source of power, tool holding means on said
tool bar, a bearing assembly mounting said tool bar for rota-
tion by said source of power, at least one universal attachment
-~ block assembly securable to said device and being detachably
securable to the equipment being worked upon, said universal
:~ attachment block assembly positioning said ~ool bar in the de-
sired planes for the machining function desired.
Another advantage of the present invention is that
it is readily usable either horizontally, vertically or at an

4~
angle and furthermore it is readily adapted for use for sur-
facing operations where a rotating cutter or grinding assembly
is required.
Another advantage of the invention is the provision
of one or more universal attachment block assemblies by which
- the device is readily attached in position on the equipment by
tack welding and which furthermore permits adjustment of the
device in various planes in order to position same for the de-
sired machining operation.
Another advantage of the invention is to provide a
device of the character herewithin described which is simple
in construction, economical in manufacture and use and other-
wise well suited to the purpose for which it is designed.
With the foregoing in view, and other advantages as
will become apparent to those skilled in the art to which this
invention relates as this specification proceeds, the invention
is herein described by reference to the accompanying drawings
forming a part hereof, which includes a description of the pre-
ferred typical embodiment of the principles of the present in-
vention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevation of one embodiment of
the device.
Figure 2 is a side elevation of the lower end of the
cutter bar assembly showing same in position for reboring the
apertures in a pair of spaced and parallel clevis plates.
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Figure 3 is a side elevation of one of the universal
attachment block assemblies.
Figure 4 is a view substantially along the line 4-4
of Figure 3.
Figure 5 is a fragmentary isometric view of the at-
-~ tachment block assembly secured to the equipment by tack weld-
ing.
Figure 6 is an enlarged partially fragmented side
elevation of one embodiment of the device with the tool bar
raising and lowering means deleted for clarity.
In the drawings like characters of reference indicate
corresponding parts in the different figures.
DETAILED DESCRIPTION
Proceeding therefore to describe the invention refer-
ence should first be made to Figures 1 and 2. Figure 2 shows
~-~ the rear end 10 of a piece of equipment which includes a palr
-- of horizontally sltuated spaced and parallel hinge plates 11
and 12 havlng apertures 13 formed therethrough in ver*ical;re-
gistration, the equipment being designed to receive a coupling
(not illustrated) between the plates together with a hinge pin
(not illustrated) engaging through the apertures 13 and through
the aperture within the coupling so that the piece of equipment
to which the coupling is attached may be connected to the piece
of equipment 10~ for swinging movement in a horizontal plane re-
26 lative to one another.
i s
H~wever, as previously mentioned, this concept/purely
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illustrative and is not to be considered limiting but is shown
only as an example of the use of the invention.
The invention collectively designated 14 includes
supporting structure taking the form of a gear box collectively
: 5 designated 15 together with a source of power such as a hydrau-
lic motor 16 supported upon the gear box casing 17 and being
operatively connected therewith as will hereinafter be describ-
ed.
A tool bar collectively designated 18 is rotated by
the gear box and is adapted for vertical movement relative to
the gear box as will hereinafter be described. A plurality o~
vertically situated supports 19 extend upwardly from the gear
box and support a mounting platform 20 which is slidable along
the support bars 19 and can be clamped in the desired position
by means of clamp bolts 21 which are conventional.
This mounting platform supports a~ hydraulic piston
and cylinder assembly 22 which extends upwardly therefrom and
- which includes a plston rod 23 extending from the lower end of
the cylinder 24. Hydraulic hoses 25 are operatively connected
to a source of hydraulic fluid under pressure (not illustrated)
:~ as are hoses 26 of the hydraulic motor 16.
The piston rod is connected to a cross head 27 situat-
ed upon the upper end of the tool bar 18 which extends above
the gear box 15 so that extension and retraction of the piston
and cylinder assembly 22 will cause vertical movement of the
tool bar, extension of the piston and cylinder assembly lower-
~:
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ing the tool bar relative to the gear box and retraction of
the piston and cylinder assembly raising the tool bar rela-
tive to the gear box.
One or more universal attachment block assemblies 28
are provided to detachably secure the device for assembly in
the desired position relative to the equipment being worked
upon and details of this attachment block assemhly together
with its method of use, will hereinafter be described.
Although Figure 6 shows an alternative method of
mounting the lower end of the tool bar 18, nevertheless refer-
ence should be made to Figure 5 for details of the tool bar
and gear box components.
The gear box 17 includes upper and lower plates 29
and 30 together with the vertical wall plates 31 extending
therebetween and being secured by means of bolts 32 to form
the gear box enclosure.
:
The drive shaft 33 from the hydraulic motor 16 is
supported within bearings 34 and a gear 35 is secured to the
shaft within the casing and is rotatable by the shaft. This
gear engages with a drive shaft or tool bar gear 35 also
situated wlthin the gear box casing 17 and having a cylindrical
sleeve 36 extending therethrough to which the gear 35 is se-
cured. This sleeve is journalled for rotation within bearings
37 in the gear box casing 17.
The drive shaft or tool bar collectively designated
18 is rotatable by g-ar 35 but is slidable lengthwls~ relativo
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thereto. An elongated keyway 38 is formed in the ~urface of
the tool bar 18 and a spline or key (not illustrated) extends
from the inner surface of the sleeve 36 thus providing rota-
tion to the tool bar omitting the aforementioned sliding move-
ment via the piston and cylinder assembly 22 illustrated in
Figure 1.
Situated below the gear box is a main bearing assem-
bly collectively designated 39 which, in the embodiment shown
; in Figure 1 is secured to the underside of the gear box and
through which the tool bar èxtends to be supported for rotation
therein. The mounting of the main bearing assembly specifically
designated 39A in Figure 6, will be described later.
; A steady rest bearing collectively designated 40
surrounds the tool bar adjacent the lower end thereof and once
again different construction is illustrated in Figures 1 and 6
with the construction of Figure 6 being identified by reference
character 40A which will also be described later.
The steady rest bearing 40 in Figure 1, is provided
with one of the universal attachment block assemblies 28 and
in the embodiment illustrated, a further universal attachment
block assembly 28 is shown in conjunction with the lower cy-
lindrical portion 41 of the main bearing assembly 39. Refer-
ence to Figures 3, 4 and 5 show details of the attachment
block assembly which includes a block 42 provided with a cy-
lindrical aperture 43 formed therethrough and a further cy-
lindrical aperture 44 formed through the block at right angles
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to the aperture 43 and with the longitudinal axes of the two
apertures being spaced apart as clearly shown in the drawings.
The portion of the block between the aperture 43
and one side is split as at 45 and the portion oE the block be~
tween the aperture 44 and the other side is also provided with
a split ~6 with clamp screws 47 and 48 respectively being
screw threadably engageable within the block and spanning the
slit so that when they are tightened, the split portions are
pulled together thus clamping a first member ~9 relative to
the block insofar as clamp screw 47 is concerned and the second
member 50 extending through the block insofar as clamp screw
48 is concerned.
One end of the cylindrical member 49 is secured as
by welding, to the device via the portion 41 of the main bear-
ing assembly 39 or the steady rest bearing 40 as clearly shown.
The other cylindrical member 5d is detachably secured by one
end as by tack welding or the like to a convenient part 51 of
the equipment upon which the device is attached. It will of
course be appreciated that this end of the member 50 could be
screw threaded and engaged through aper-tures and nuts secured
on the distal ends thereof but it is not usual that convenient
apertures would be available so that the temporary weld illus-
trated by reference character 52, is the desired method of
mounting these attachmen blocks.
Once mounted in the desired location, with the

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clamp screws 47 and 48 loosened, it will be appreciated that
the device 14 can be positioned so that the tool bar 18 is
~ in the desired plane for the correct operation whereupon the
: clamp bolts 47 and ~8 can be tightened thus securely fasten-
ing the device in the desired position. After use, the tem-
porary welds 52 are easily removed thus permitting the device
to be removed from the equipment.
Although only two such attachment block assemblies
28 are illustrated, nevertheless further assemblies can be
used depending upon the e~uipment and the work to be done.
A tool holder 52 is secured to the lower end of the
tool bar 18 and adapted to receive a cutting or grinding tool
53 clampable in position so that the apertures 13 may be bored
out to the desired amount with a single mounting of the device,
it being understood that the lengthwise movement of the tool
bar permits firstly the upper aperture 13 to be bored out and
- then by adjusting the position of the tool bar vertically, en-
abling the second aperture 13 to be bored out in alignment
with the first aperture 13.
In the embodiment illustrated in Figure 6, the main
bearing assembly 39 includes an outer shell 54 carrying a
bearing sleeve 55 and being secured to the underside of the
gear box casing 17 by means of bolts 56.
An inner bearing sleeve is adjustably secured between
lock nuts 58 as clearly illustrated with the bearing shell 54
being secured by studs and nuts 59 to an upper main bearing

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plate 60, it being understood that the drive shaft or tool bar
18 is supported for rotation and endwise movement through the
main bearing assembly 39A.
A plurality of guide bars 61 are secured by the upper
ends thereof to around the periphery of the circular main bear-
ing plate 60 by means of nuts 62 and the lower ends of the
guide bars engage through a lower mounting plate 63 to be se-
cured by further nuts 64 thus maintaining the lower plate 63
in spaced and parallel relationship below the main bearing cas-
ing 60.
The aforementioned steady rest assembly 40A includes
a steady rest plate or member 65 having a plurality of bear-
ings 66 provided around the periphery thereof and slidably en-
gaging the guide bars 61. The cutting head steady bearing
specifically designated 67 is secured within the steady rest
plate 65 by means of bolts 68 engaging through bearing ring
69 as clearly shown, said bearing ring carrying a cylindrical
bearing 70 engaging within an annular groove 71 formed around
the outer periphery of the aforementioned cutting head 52 with
tool holder 71 being secured on the periphery of the lower end
~`~ of the cutting head 52.
This means that as the piston and cylinder assembly
22 moves the tool bar 18 vertically through the gear box 15,
the steady guide bar bearings 66 slide upwardly and downwardly
on the guide bars 61 and at the same time permit the rotation -
also
of the cutting head 52 and/supplies support for the lower end
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of the tool bar.
In operation, the device is mounted by the universal
attachment block assemblies 58 as hereinbefore described with
the desired tool 53 engaged within the tool holder 71.
When the device has been positioned correctly, the
clamp bolts or screws 47 and 48 are tightened thus locking the
device in the correct position as ~or example illustrated in
Figure 2.
The hydraulic motor 16 rotates the tool bar 18 thus
pexforming the desired operation upon the equipment to which
it is detachably mounted.
Since various modifications can be made in my inven-
tion as hereinabove described, and many apparently widely dif-
ferent embodiments of same made within the spirit and scope~
of the claims without departing from such spirit and scope,
it is intended that all matter contalned in the accompanying
specification shall be interpreted as illustrative only and
not in a limiting sense.
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