ARO Bant-A-Matic 8248-B User manual

Tool Products
OPERATOR’S MANUAL
INCLUDING:OPERATION,INSTALLATION& MAINTENANCE
BANT-A-MATIC® SELF-FEED DRILLS
Models 8248-B( )-( )
SECTION M106
MANUAL 21
Released: 4-1-68
Revised: 12-12-94
Form: 3262-2
IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
OPERATING PRECAUTIONS
l Keep hands and clothing away from rotating end of tool.
l Wear suitable eye protection while operating tool.
l Disconnect air supply from tool before removing/installing bit
or performing other maintenance procedures.
ROUTINE LUBRICATION REQUIREMENTS
Lack of or an excessive amount of lubrication will affect the perfor-
mance and life of this tool. Use only recommended lubricants at
below time intervals:
EVERY 8 HOURS OF TOOL OPERATION - Fill lubricator reser-
voir of recommended F.R.L. with spindle oil (29665).
EVERY 160 HOURS OF TOOL OPERATION - Inject NLGI #1
“EP” grease (33153), 1 to 2 strokes, thru grease fitting in gear
housing. NOTE: Spindle must be extended from outer sleeve suf-
ficiently to expose grease fitting in gear housing. Gearing should
contain approximately 1/8 oz. (3.5 g) of grease.
AIR SUPPLY REQUIREMENTS
For maximum operating efficiency, the following air supply specifi-
cations should be maintained to this air tool:
l AIR PRESSURE - 90 PSIG (6 bar)
l AIR FILTRATION - 50 micron
l LUBRICATED AIR SUPPLY
l HOSE SIZE - 5/16” (8 mm) I.D.
An ARO® model C28231-810 air line FILTER/REGULATOR/LU-
BRICATOR (F.R.L.) is recommended to maintain the above air
supply specifications.
MOUNTING
The nose end of the outer sleeve (41) is provided with 1-7/16” -
18 L.H. threads [remove thread guard (47) foruse] and a 1-7/16”x
1/2” long pilot diameter for fixture mounting. Foot and flange type
mounting brackets are available for tool mounting.
RECOMMENDED LUBRICANTS
Afterdisassembly is complete, all parts, except sealed or shielded
bearings, should be washed with solvent. To relubricate parts, or
for routine lubrication, use the following recommended lubricants:
Where Used - Description
Air Motor 29665 1 qt. Spindle Oil
“0” Rings & Lip Seals 36460 4 oz. Stringy Lubricant
Gears and Bearings 33153 5 lb. “EP” - NLGI#1 Grease
SET-UP PROCEDURE
WARNING: Keep clear of rotating end of unit with hands and/or
clothing. Keep fingers/hands from being pinched between hous-
ing or valves and adjustment screws and/or trip bracket.
l
l
a
l
l
a
0
l
l
a
Loosen two screws (29) and remove cover (1).
Allow a minimum distance of 1/4” between the drill point of the
unit and the workpiece. This is necessary for the air motor to
start and reach free speed before the drill point touches the
workpiece.
Determine the TOTAL STROKE LENGTH the drill must travel
to perform the drilling operation - see illustration below.
Loosen jam nut (8) and turn adjustment screw “A” so the dis-
tance between the end of the screw and the stud (26) equals
the total stroke length.
Tighten jam nut (8).
Loosen jam nut (8) and turn adjustment screw “B” (valve-in-
head models only) so the distance between the end of the
screw and the button bleed valve (25) is slightly GREATER
than the distance set for adjustment screw “A”.
Start and let the unit advance until the adjustment screw “A”
makes contact with the stud (26).
Carefully, and be aware that the unit is going to retract, turn the
adjustment screw “B” until it depresses the button bleed valve
(25) enough to cause the unit to retract.
lighten jam nut (8).
See “FEED RATE CONTROL VALVES”, page 2.
ADJUSTMENT SCREW “6” 7
DEPTH OF DRILLING
OPERATION
THIS DISTANCE MUST
TOTAL STROKE LENGTH ADJUSTMENT SCREW “‘A’
For parts and service information, contact your local ARO distributor, or the Customer Service Dept. of the Ingersoll-Rand Dis-
tribution Center, White House, TN at PH: [phone], FAX: [phone].
A
R0 Tool Products
Ingersoll-Rand Company
INGERSOLL-RAND,
1725 U.S. No. 1 North l P.O. Box 8000 l Southern Pines, NC 283888000
01994 THE ARO CORPORATION. PRINTED IN U.S.A.

FEEDRATE CONTROL VALVES
l Turnvalve(23), marked“R” antop of housing,approximately1-1/2
turns counterclockwise (open).
l Turn the other valve (23), marked “F” on top of housing, clock-
wise until closed (do not tighten too snugly).
l Startunit and slowlyturn valve(23) marked“F” counterclockwise
(open) until the desired forward rate of feed ISreached.
l Afinal adjustmentofthe rateof return(retract) can be madewith
the valve (23) marked “R” on housing.
REMOTEOPERATION
MANUAL OPERATION
install buttonbleedvalve(25) in eitherthe “F” portlocated attop
of valve housing or the “F” port located at the rearof valve hous-
ing. NOTE:Unused port must be plugged with pipe plug (24).
Depressbutton bleed valve (25) marked “F” on valve housing.
Theunit will start in the forward (advancing) modeand continue
to feedforward until the adjustingscrew “B” hasdepressedbleed
valve (25) marked “R” to retract the unit. Seeset-up procedure.
A manual emergencyretract button bleed valve (25) can be in-
stalled in “R” port at top of valve housing if desired. This valve
con beusedto immediately retractthe unit in case of misaligned
part or other emergency.Valve not furnished.
Install a pressurebleedvalve-ARO port number9600 - in valve
port marked “F” at either the top or rear of valve housing
Connect pressure bleed valve - using 1/8” i.d. tubing - to o
remoteoperatedvalve which, when actuated, feeds air pressure
to the pressurebleedvalve.Pressurebleedvalvewill bleedthe air
from “F” port of valve housing causing spool valve in housing to
shift to the forward feed position thus starting the forward stroke
of the unit.
Install a pressurebleedvalve-ARO port number9600 - in valve
port marked “R” at the TOPof the valve housing and connect -
using 1/8” i.d. tubing - to o remote MANUALLYoperatedvalve.
This valve is used OSon emergency retract in case of a port mis-
alignment or such only as the unit, when properlyset-upand ap-
plied, will automatically retract and return to the start position.
Seeset-up procedure.
Referto page 11for plumbing and schematic diagrams.
SPECIALNOTE:Theair inlet and remote ports of valve housing hove
tapered pipe threads and should not require the use of thread
sealants, such as sealant tape or pipe joint compounds. Thread
sealants when used improperly can contaminate air passagesand
cause valve or unit to malfunction.
RECOMMENDEDPOWERAIR INLET SYSTEM
Your AROSelf-Feedtool is designedto deliver specific horsepower and thrust to achieve high rates of work. To assure the unit will develop this power care must be taken that
the power airinlet systemis correctly sizedto permitthe proper rote ofair flow. Shown is a systemtar o single tool that will supply correct delivery. IMPORTANT-the tool ISpower
rated when 90 P.S.I.is present ATTHETOOLDURINGOPERATION.
Shown below Is the same systemIn schematic form.
F = FILTER
R = REGULATOR
L = LUBRICATOR
F-R-L- MODEL C28221-810
Iftwo or three units are to be installed, each unit should be supplied with o system like that shown below or use system like that above far each tool.
FILTER MODEL F25231-110
REGULATOR MODEL R27231-100
LUBRlCATOR MODEL L26221-110

Y-- --Y
Fig.1
IMPORTANT
RECOMMENDED METHOD FOR HOLDING DRILLS IN SPINDLES ’
Toproperlyhold drill bit in collet and reducethe chance of slippage,
a flat must be ground on the shank end of the bit. The flat should
be approximately 5/16” (8mm) long and the depth should be 1/3 of
thebitdiameter NOTE:If bit IS toolargetofit intolockinginsert(smaller
capacity DualSpindlesdo nothoveinsert),a squaremustbeground
onto the shank end of the bit.
SET-UP PROCEDUREWITH OPTIONAL
HYDRAULIC CHECK
Fsg.4 i ’ b
c‘t NT1 v\
Assemble hydraulic check to mounting bracket and assemble
mounting brackettotool using washers (Y14-8) and cap screws
(Y154-48).
Measuredistance from drill point to work piece - distance “Y”.
Distance“X” between hydraulic check plunger and trip bracket
must be lessthan distance “Y” to preventdamage to drill point
when it approaches the work piece.
Loosenthe cap screws (Y154-48)and position hydraulic check
to obtain correct setting for distance “X”.
Tightencop screws (Y154-48)securely before operating unit.
Increasethe air flow thru the FeedControl Valve marked “F” by
openingtwo (2) full turns from closed position.Thiswill allow drill
toadvancerapidlyuntilthetrip bracketcontactsplungerof hydraul-
ic check.
Insert bit into spindle and into locking insert (where applicable) In-
suring that one of the set screws locates squarely on the flat of the
bit.Tightencollet firmly, then tighten set screws.NOTE:DONOTover-
tighten collet. NOTE:Intentof setscrews is onlyto keepbitfromturn-
ing in collet.
TheHydraulic FeedRateAdjustmentis located at the name plate
end of the Hydraulic Check Rotateextendedspindle until the slot
on spindle ISlocated midway betweenthe highest andthe lowest
settings.
Start drill unit and the drill will advance at a rapid rate until the
trip bracket contacts plunger of hydraulic check.
Slowly rotatethe Hydraulic FeedRatecounterclockwisefor faster
feed rate or clockwise for slower feed rate.
TO CONTROLBREAKTHROUGH
Positionhydraulic checksothe distancebetweenthe plunger and
the trip bracket(distance “X”) is lessthanthe distancefromthe
drill point to the opposite side of the work piece (distance “W’).
l Set-upof the self-feeddrill unit will be the same as explained in
Set-UpProcedure,page 1.
ADJUSTMENTSCREW“6” 7
FEEDRATEADJUSTMENT
* HYDRAULICCHECK(SEETABLE) OUNTINGBRACKET40298
PARTSINDICATEDBY ASTERISK(*) AREINCLUDED
IN 40301-( ) HYDRAULICCHECKASSEMBLY.
3

\ \
\ \- \
106
106
I

78
VALVE
SECTION
MOTOR AND
PISTON
SECTION
GEARING
SECTION
I
5
INCLUDES ITEMS 88 THRU 111.

28 127
I
27 71
30
26
\
\

DISASSEMBLY/ASSEMBLYINSTRUCTIONS
l Neverapply excessive pressureby a holding device which may
cause distortion of a part
l Apply pressureevenly to parts which have a pressfit.
l Apply even pressureto the bearing race that will be pressfitted
to the mating port
l Use correct tools and fixtures when servicing this tool.
l Don’t damage “0” rings when servicing tool.
l UseOnlygenuine AROreplacement parts for this tool. When or-
dering, specify par-tnumber,description,tool model number and
serial number.
TWIN DRILL DISASSEMBLY
-Using 3mm hex wrench supplied with unit, loosen both adjust-
ment screws (111)completely. IMPORTANT:Alternately unthread
adjustmentscrews approximately 1/2turn at a time or unthread
screws simultaneously to prevent damaging the unit.
-Remove body and spindle assemblies from adapter (89).
-Remove retainingring (93) and pull spindle(90) and components
from adapter (89).
-Using retaining ring pliers, removeretaining ring (96) from gear
(97).
-Remove needle roller (98) and gear (97).
-Remove retaining ring (94) and lock ring (92) from spindle,
-Bearings (95 and 91) ore pressfit on driving spindle (90).
-Remove “C” clip (99) from adjustment screws,
-Rotate spindle turretwhile pulling outward until o portion of spin-
dle aligns with notch in bodyand removespindle assembly(108)
from body.
-Remove oil reservoir(106).
-Remove nylon washer (105) by bending slightly.
-Remove nylon washer (101)and gear (102).
-Bearings (103) and spacer(104)are loosepartsandwill dropout,
-DO NOTdisassemblespindle(108)unlessit ISnecessaryto replace
a port.
-To disassemble,using aflat bottomtype punch orsimilar tool and
an arbor press, remove gear (113)from spindle (125). CARE
SHOULDBETAKENTOREPLACEGEAR(113)INTHESAMEPOSI-
TIONWHENREASSEMBLING.Thegearis assembledwith teeth up
on turret stamped “T”. The gear is assembled with teeth down
on turret stomped “B”.
-Remove spindle (125) from sleeve (122)carefully, as six rollers
(120) are loose parts and will drop out. NOTE:Thrust race (121)
ISpressfit on spindle.
-Using a “C” type washer that properly fits spindle, pressthrust
race off spindle.
-Remove oil seal (124).
-If link bearing (114)and sleeve (122)are removedfrom turret, it
will be necessaryto removethe foam strip (117)first. Liftone end
of foam strip and pull so it slides thru notch under link bearing.
-Using a propersizepunchandan arborpress,removelink bearing.
-Press sleeve thru remaining distance in turret,
TWIN DRILL ASSEMBLY
-Pack bearingsand coatgearswith a goodgradeof bearinggrease
when assembling.Saturateoil reservoirswith a good multigrade
10W/30 oil
-When fitting sleeve(122),it is Importantthat the slot in the sleeve
lines up with the groovein the backface of the turret. Pushfoam
strip (117)intothe groovein theturret(widestsideacrossgroove),
The center of the strip should be under the sleeve and the two
ends should meet at the point opposite the sleeve.
-Press the link bearing(114)overthe small end ofthesleeve,keep-
ing the 5mm hole in the link bearing aligned with the 5mm hole
in the turret.TOmaintain alignment, usea 5mm pin insertedthru
the bore in the link bearing and the turret.
-Assemble oil seal (124)to spindle.
-Assemble thrustrace (121)to spindle, pressingan upto theshoul-
der. Becertain thrust race is pressedon and squarely seated,or
prematurefailure of the bearing may occur.
-Drop the thrust race into the boreof the sleeveassembledin the
turret.
8
-Place asmall amount of greaseonspindleand positionthetwenty
needlerollers(123)betweenthe oil seal(124)andthrustrace(121)
-Place asmall amountofgreaseonshoulderbetweenthetwothrust
races and position the six rollers (120) on spindle.
-Slide spindle into sleeve,insuringfoamstrip is keptout oftheway
-Place a few drops of oil into sleeveand pushspindle firmly down
into sleeve.
-Hold spindle in position and turn turret assemblyover with gear
end up.
-Apply a small amount of greaseto needle cage (116)and slide
cageoverthe end of the spindle, into the boreof the link bearing
-Place washer (115)over spindle.
-Be certain gear is positioned correctly on spindle. Position with
teethup on turretstomped “T”. Positionwith teethdown onturret
stamped“B”. IMPORTANT:When pressinggear on spindle, allow
on end play of .001”.
-Press roll pins (107) into 1/8” diameter holes in turret. Assemble
Setscrews (109) to spindle.
-Insert a dummy adjustment screw (111),or a shaft of the same
diameter,thru bodyfromthe backor adaptersideof bodyto main-
tain alignment of parts to be assembled into body.
-Assemble one nylon washer (101)over dummy screw and down
into body.
--Assemble bearing (103), spacer (104) and other bearing (103)
to gear (102).
--Assemble gear with bearingsto dummy screw, with largest por-
tion of gear going on screw first.
-Assemble one nylon washer (101)to screw.
-Assemble nylonwasher(105) to screw,bending slightly to gothru
hole in body.
-Assemble oil reservoir(106) into body and position holes for roll
pins sothey will align with roll pins of spindle when spindle is as-
sembled to body.
-Assemble spindle (108) to bodyand screw,aligning roll pins with
holes in oil reservoirand extended portion of spindle with notch
in body.
-Assemble spring washer (110)and one nylon washer (101)to ad-
justment screw (111).
-Assemble screw (111)to unit,while at the sametime withdrawing
dummy screw from unit.
-Assemble “C” clip to screw (111)to secure screw to unit.
-Assemble bearings (91 and 95) to driving spindle (90)
-Assemble gear(97) to drivingspindle(go), aligning holethru gear
with hole in spindle.
-Assemble needle roller (98) thru gear and spindle.
-Assemble retaining ring (96) over gear and needle roller.
-Assemble lack ring to spindle over bearing (95) and assemble
retaining ring (94) to lock ring.
-Assemble driving spindle and components to adapter (89) and
secure with retaining ring (93).
-Assemble the twin drill body assemblyto the adapter and lock
ring, alternatelythreading adjustmentscrews into lock ring, simi-
lar to disassembly.
-Refer to “spindle adjustment”, page 3
GEARING DISASSEMBLY
-Using wrenches on flats of adopter (89) and ring gear (83), un-
thread adapter from gearing.
-Using wrenches onflats of driving dog (88) and spindle nut (85),
unthread and removedriving dog from spindle. Removespindle
nut (85) also.
-Thread adjustmentscrews (6 and 7) all the way back and push
the piston rod (48) all the way forward to expose wrench flats
of motor housing (51) from the outer sleeve (41).
-Using wrenchesonfiats of ring gear and motorhousing,unthread
gearing from motor housing
-If tool hasdouble gearing,unthreadring gear(83) from ring gear
(81).
-Grasp ring gearin one hand and tap thethreadedendof thespin-
dle with a softfaced hammer;spindle and componentswill loos-
en from ring gear.
-Remove bearing(s)andshaftsfromspindleto removeplanetgears.

DISASSEMBLY/ASSEMBLYINSTRUCTIONS
M106
21
GEARING ASSEMBLY
-Assemble gears to spindle and secure with shafts.
-Align notch at end of shaft with step on spindle (align notch of
shaft with spacer (80) for auxiliary gearing).
-Pack bearing (70) with ARO33153 grease and assemble to
spindle.
-Lubricate gears of spindle liberally with ARO33153 grease and
assemble spindle to ring gear.
-Pack bearings(84) with ARO33153greaseand assembleto spin-
dle with the UNMARKEDfacesof bearingfacing each other (iden-
tification markings on bearing facing out).
-Assemble spindle nut (85) to spindle (drive gearing only).
-Assemble gearing and twin drill attachment to tool.
MOTOR DISASSEMBLY
-Remove gearing from tool as previously outlined.
-Remove spacers(69 and 68) and motorassemblyfrom housing.
-Remove cap (52) and shield (53).
-Grasp cylinder in one hand andtap splined end of rotor (58) with
a soft faced hammer; motor will come apart
MOTOR ASSEMBLY
-Pack open bearings with ARO33153 grease.
-Assemble bearing (56) to end plate (55).
-Assemble end plate (55) to rotor.
-Coat i.d.of cylinder (62 or 63) with spindle oil 29665 and assem-
ble cylinder to end plate (55), aligning air inlet slot of cylinder
and end plate.
-Coat rotor blades (59) with spindle oil 29665 and insert in rotor
slots (straight side out).
-Assemble bearing to front end plate and assemble end plate to
rotor and cylinder.
-Be sure rotordoesnot bind (if rotor binds tap splined end of rotor
lightly to loosen).
-Assemble shield (53) and cap (52) to end plate (55).
-Assemble motor and spacers (68 and 69) to motor housing
-Assemble gearing and twin drill attachment to tool.
AIR PISTON DISASSEMBLY
-Remove twin drill attachment,gearingand motorassemblyasout-
lined elsewhere in this manual.
-Remove cover (1),adapter (3), washer (4) and trip bracket (5)
-Place valve housing in a suitable holding device with the outer
sleeve (41) in an upright position.
-Using a strop type wrench on outer sleeve (41), unthread (L.H
threads) and CAUTIOUSLYremoveouter sleeve straight up and
offfrom valve houslngto preventbending of air cylinder (35) and
damaging the inside diameter
-Handle the air cylinder (35) with care soits fine cylindrical shape
is not distorted in any manner.
-If the air cylinder remains inside the outer sleevewhen sleeveIS
removed,pushthe piston rod (48) forward then pull it backward
The cylinder will then extend from the sleeve and can now be
removed.
-Remove “0” ring (31),bearing race (32) and retaining ring (49)
-Push piston rod and motor housing out thru gear end of outer
sleeve.Piston(33) will drop out when motor housing and piston
rod are removedfrom outer sleeve.
-Insert a suitable rodthru gear end of outer sleeveand push muf-
fler cop (38) out thru valve end of outer sleeve
-Piston rod (48) and motor housing (51) are secured with a hard
dryingthreadadhesive.Ifit should becomenecessaryto separate
thesetwo parts,heatthe threaded area lightly to softenthe adhe-
sive and unthread the rod from the housing - R.H.threads.
AIR PISTON ASSEMBLY
NOTICE:When a part containing “0” rings has been removedfrom
tool, itis recommendedthat the “0” rings bereplacedwith new ones
when reassembling partto the tool. Lubricate all “0” rings with ARO
36460 “0” ring lubricant.
-Assemble retaining ring (36), “0” ring (37), “0” ring (39) and
screen (40) to muffler cap (38).
-Assemble muffler cap (38) -screened endfirst-to outersleeve
(41) from end of sleeve with internal threads. Push muffler cop
into sleeve until it bottoms against step in sleeve.
-Coat torque pin (42) with grease to retain pin in place and as-
semble inside outer sleeve in hole provided
-Assemble “0” ring (50) to piston rod
-Assemble motor housing and piston rod to outer sleevethru end
of sleevewith external threads and push piston rod thru muffler
cop using core notto damage “0” ring (37) contained in muffler
cap. Align slot in motor housing with torque pin (42).
-Assemble seals (34) to piston(33) with lips of seals facing away
from each other.
-Assemble piston (33) to piston rod (48) and push piston on rod
until it seats against “0” ring (50) and step on rod.
-Assemble retaining ring (49) to groove in piston rod, securing
piston on rod.
-Assemble bearing race (32) and “0” ring (31)to piston rod and
slide them on rod until they seat against retaining ring (49)
-Clamp valve housing (10) in a suitable holding device with the
threaded end of housing upright.
-Coat i.d. of air cylinder (35) with “0” ring lubricant 36460 and
place air cylinder on valve housing (10) over “0” ring (28).
-Using care not to damage “0” rings (11)contained in housing,
insertpistonrod (48) thru housingand carefullylocateoutersleeve
overair cylinder andthreadedsleeveto housing.Tightensecurely
using a strap wrench.
-Assemble motor,gearing, drill attachment,trip bracket and com-
ponents and assemble cover (1) to housing.
VALVE HOUSING DISASSEMBLY
Thevalve body(14),feed control valves(23) and buttonbleedvalves
(25) can beservicedwithout removing outersleevefromvalve hous-
ing.Togain accessto checkvalves(17)and componentsor“0” rings
(11),follow disassembly procedure for removing the air piston.
-Remove both caps (12) and “0” rings (13).
-Push valve body (14) out thru housing. Handle valve body with
reasonable care so the o.d. of valve is not damaged.
-Button bleed valves (25) need not be removed except for
replacement.
VALVE HOUSING ASSEMBLY
-Replace all “0” rings with new ones
-Lubricate “0” rings (15) with 36460 lubricant and assemble to
valve body.
- Assemble“0” rings (22) to needlevalves(23) and assemblenee-
dle valves to housing.
Assemble plate (126) to housing, securing with screws (127)
IAssemble valve bodyto housingand assemblecaps (12)with “0”
rings (13) to housing.
-If checkvalves (17)havebeenremoved,assemble“0” rings (16)
to valves and assemble valves to housing.
-Assemble springs (18) to housing.
-Assemble “0” ring (20) to screw plug (21) and assemble to
housing
-Assemble screw plug (19) to housing
-Assemble outersleeveand componentsto housing as described
in air piston assembly section.

1
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
10
PART NUMBER FOR ORDERING +
Cover
model 8248.B( )-1
model 8248-B( )-2
model 8248.B( )-3
Pipe Plug
Adapter
LockWasher
TripBracket
AdjustmentScrew “A”
models 8248-B( )-1 and 8248-B( )-2
model 8248-B( )-3.
AdjustmentScrew “B”
model 8248-B( )-1
models 8248-B( )-2 and 8248-B( )-3
Nut (2 req’d)
Pipe Nipple
model 8248-B( )-1
models 8248-B( )-2 and 8248-B( )-3
Valve Housing
models 8248-B( )-1 and 8248-B( )-2
model 8248-B( )-3
“0” Ring (3 req’d)
Cap(2 req’d). : : :
‘0” Ring (2 req’d)
ValveBody
‘0” Ring (5 req’d)
‘0” Ring (2 req’d)
CheckValve (2 req’d)
Spring(2 req’d)
ScrewPlug.
“0” Ring
Screw Plug
“0” Ring (2 req’d)
NeedleValve (2 req’d)
Pipe Plug (2 req’d)
Button Bleed Valve (2 req’d)
Stud
“0” Ring
“0” Ring
Screw(2 req’d)
Washer(2req’d) : :
-Housingand Valve Assembly
includes items 10 thru 30
models 8248-B( )-1and 8248-B( )-2
models 8248-B( )-3
‘0” Ring
BearingRace
Piston
Seal (2 req’d)
Air Cylinder
model 8248-B( )-1
model 8248-B( )-2
model 8248-B( )-3
Retaining Ring
“0” Ring
Muffler Cap
“0” Ring
Screen
OuterSleeve
model 8248-B( )-1
model 8248-B( )-2
model 8248-B( )-3
TorquePin
Muffler
Manifold (includes items 45 and 46)
Set Screw
“0” Ring (2 req’d)
Thread Guard
Piston Rod
model 8248-B( )-1
model 8248-B( )-2
model 8248 B( ) 3
40294-1
40294
40294-2
Y227-2-L
44883
Y14-616
41713-2
40292-2
40292-3
40857-5-1
40857-7-1
40285
40799
34276
46696
Y325-12
40287
41082
Y325-2
39587
35733
39652
Y325-3
38863
Y325-7
48441-1
Y227-2-L
24130
16558
Y325-26
Y325-24
Y154-19
Y14-4
40813-1
40813-2
41534
42364
39459-1
35922
39458-1
39458
39458-2
39471
Y325-16
39456
Y325-24
39461
10750
30295
10800
40297-1
13551-2
41204
Y29-82
Y325-29
35912
40751-1
40293-1
408011
49
50
51
52
53
55
56
58
59
60
61
62
63
64
66
67
68
69
70
71
73
74
75
76
77
78
80
82
83
84
85
89
90
91
92
93
95
96
98
99
100
101
102
103
104
105
106
107
PART NUMBER FOR ORDERING
Retaining Ring
“0” Ring (2 req’d)
Motor Housing
models 8248.B( )-1 and 8248-B( )-2
model 8248-B( )-3
Cap
Shield
RearEnd Plate
Bearing
Rotor
7 teeth, used with motor ass’y 33654-2
12teeth, used with motor ass’y 34746-2
Blade (5 req’d)
Roll Pin
Roll Pin
Cylinder (Includes items 60 and 61)
Cylinder (Includes item 60)
Front End Plate, used with motor 33654-2
Bearing
Front End Plate, used with motor 34746-2
Bearing
Motor Assembly
for 2700 r.p.m. models
for 900, 4400 and 19000 r.p.m.models
Spacer
Spacer
Bearing
Shaft (2 req’d)
Spindle
Gear (2 req’d) 20 teeth
Shaft (2 req’d)
Spindle
Gear (2 req’d) 17teeth
Shaft (2 req’d)
Spindle
Spacer
Ring Gear
Retaining Ring
Ring Gear (includes grease fitting 35967)
used with 4 83:1gearing (46 teeth)
used with 8:1gearing (49 teeth)
Bearing (2 req’d)
Spindle Nut
Auxiliary Gearing Ass’y (4.83:1), includes
Items 70 (2 req’d), 77 (2 req’d), 78 (2
req’d), 79, 80, 81and 82
DriveGearingAss’y(4.83:1),includes items
70, 75 (2 req’d), 76,77(2 req’d ), 83, 84
and 85
DriveGearingAss’y(8.1),includes items70,
71(2 req’d), 73,74(2 req’d ), 83, 84 and
85
Driving Dog
Adapter
Driving Spindle
Bearing
Lock Ring
Retaining Ring
Retaining Ring
Bearing
RetainingRing
Driving Gear
NeedleRoller
‘C” Clip (2 req’d)
Body
Nylon Washer (6 req’d)
Gear (2 req’d)
NeedleBearing (4 req’d)
Spacer (2 req’d)
Nylon Washer (2 req’d)
Oil Reservoir
Roll Pin (2req’d)
.
Y145-20
Y325-13
40296
40802
39466
39465
33096
38232
33026-1
34734-1
32860
33416
Y178-1
33397
34747
33024
32851
34742
Y65-8
33654-2
34746-2
34737
33018
32850
38251
39467
33048
38722
39468
34745
34735
35915
34736
35914
35900
39481
39482
48305-1
38893-1
36017
47370
47371
45979
46394-2
46394-3
46394-4
46394-7
46028
46394-6
46394-5
46394-10
46394-11
46394-9
46394-19
46394-14
46394-18
46394-15
46394-17
46394-16
46394-13
46394-26
Y178-46

108
PART NUMBER FOR ORDERING
t
PART NUMBER FOR ORDERING M106
Spindle Assembly (2req’d)
with “T” stamped on housing
with “B” stamped on housing
109 Set Screw (2req’d)
110 Spring Washer (2 req’d)
111 Adjustment Screw (2 req’d)
112 Collet (2 req’d)
113 Gear
114 Link Bearing
115 Washer
116
117 NeedleCage
FoamStrip
118 Turret
119 Thrust Race
47368-( )
47757-154
47757-155
47757-159
47757-285
47757-284
47757-156
47757-157
46394-27-T
46394-27-B
46394-24
46394-21
46394-20
I
120
121
122
123
124
125
126
127
Roller (6 req’d)
Thrust Race
Sleeve
Needle Roller (20 req’d)
Oil Seal
Spindle
47757-158
47757-306
47757-153
47757-237
47757-286
47757-152
PARTSNOTSHOWN
Set Screw (in body) (2 req’d.)
Wrench - open end (8mm)
Wrench - box end (8mm)
Wrench - hex (3mm) (2 req’d.)
Wrench - hex (3mm)
Plate
Screw (2 req’d)
BASIC REMOTE CONTROL FOR START
AND EMERGENCY RETRACT FUNCTIONS
3WAY PALM BUTTON VALVE MODEL
461 3 WITH OUARO 20975 IRECESSED
GRELN 6”TTONI WSTANT T”6E CON
NECWJNS AN0 SPRlNG RETVRN
lECTOR 69474 om*
a UDIL 11 EMERGENCY
45984
46394-29
46394-30
46394-32
46058
48440-1
Y211-1
Model No. Color Size
59690-004 White 5/32
59690-104 Black 1 5/32
59690-204 Green I 5/32
IN WC PORT
d SUPPLY
59690-404
59690-504
59690-604
59690-704
*packaged 10 to a box
REMOTE OPERATION
Remote operation of the unit may be achieved by connecting a 3-way valve to the remote start and/or remote retract ports, as shown above
TO START - depress the remote button momentarily. The unit will advance the drill to a pre-set depth and automatically retract to the initial position whereupon the
unit will stop.
EMERGENCY RETRACT - depress the emergency button momentarily.This signal to the unit will shift the built-m pressure operated valve, commanding the unit to
retract immediately to the initial position whereupon the unit will stop
NOTE: MANUAL START and EMERGENCY RETRACT buttons on the tool are fully operational even when remote control is used The manually operated buttons
can be used when setup is required.
Shown below is the same system in schematic form
SUPPLY
11

47368-( ) COLLETS
COLLET BORE ACCEPTS COLLET BORE ACCEPTS
PART DIA. DRILL SIZE PART DIA. DRILL SIZE
NUMBER (REF.) INCH NO. MM NUMBER (REF.) INCH NO. MM
47368-1 .039 61 1.0 47368-17 .102 38 26
47368-2 .043 57 1.1 47368-18 .106 36 27
47368-3 .047 3/64 56 1.2 47368-19 .110 7/64 35 20
47368-4 .052 55 1.3 47368-20 .114 33 29
47368-5 .055 54 1.4 47368-21 .118 32 30
47368-6 .059 53 1.5 47368-22 .122 31 31
47368-7 .063 1/16 52 1.6 47368-23 .126 1/8 32
47368-8 .067 51 1.7 47366-24 .130 30 33
47368-9 .071 50 1.8 47368-25 .134 29 34
47368-10 .075 48 1.9 47368-26 .136 35
47368-11 .079 5/64 47 2.0 47368-27 .142 9/64 28 36
47368-12 .083 45 2.1 47368-28 .146 26 37
47368-13 .087 44 2.2 47368-29 .150 25 38
47368-14 .091 43 2.3 47368-30 .154 23 39
47368-15 .094 3/32 42 2.4 47368-31 .157 5/32 22 40
47360-16 .098 40 2.5
NOTE:COLLETSARE NOT FURNISHEDWITH DUAL SPINDLEATTACHMENT- COLLETSMUST BE ORDEREDSEPARATELY.
SERVICE KIT NO. 41205-l
SERVICEKIT NO. 41310-1
(FORSERVICINGONEMODEL8248-B( )-1,-2, -3 EXCEPT
MODEL8248-B30-1,
-2, -3 SEEKITNO.41310-1)
CITY. PART NO. DESCRIPTION QTY. PART NO. DESCRIPTION
1 Y65-8 Bearing 2 Y325-2 “0” Ring
1 38232 Bearing “0”
Y325-7 “0” Ring
5 32860 Blade Ring
2 35733 . Spring 2 Y325-12 “0” Ring
2 35922 Seal 2 Y325-13 “0” Ring
1 39461 Screen 1 Y325-16 “0” Ring
1 39466 Cap 2 Y32524 “0” Ring
1 41795 Motor Oil 1 Y325-26 “0” Ring
1 41799 Gear Lube 3 34276 “0” Ring
1 41954 “0” Ring Lube 5 41082 “0” Ring
1 41534 “0” Ring
(FORSERVICINGONE
MODEL8248-B30-1.
-2, -3)
QTY. PART NO. DESCRIPTION QTY. PART NO. DESCRIPTION
-i- 32851 Bearing 2 Y325-2 “0” Ring
1 38232 Bearing 1 Y325-3 “0” Ring
5 32860 Blade 2 Y325-7 “0” Ring
2 35733 Spring 2 Y325-12 “0” Ring
2 35922 Seal 2 Y325-13 “0” Ring
1 39461 Screen 1 Y325-16 “0” Ring
1 39466 Cap “0” Ring
1 41795 Motor Oil “0” Ring
1 41799 Gear Lube 3 34276 “0” Ring
1 41954 “0” Ring Lube 5 41082 “0” Ring
1 41534 “0” Ring
TROUBLESHOOTING
LISTEDBELOWARESOMEOFTHEMOSTCOMMONCAUSESFORTHESELF-FEEDDRILLTOMALFUNCTION.MALFUNCTIONSBEYONDTHE
SCOPEOFTHISMANUALSHOULDBEBROUGHTTOTHEATTENTIONOFYOURAROREPRESENTATIVEORRETURNTHETOOLTOFACTORY
FORREPAIR.
CONDITION POSSIBLECAUSE
Failure to feed or irregular
or erratic feed.
Low speed or motor fails
to operate.
Motor continues to run
after retraction.
Failure to retract.
12
1. Inadequate air supply.
2. Feed control valves improperIy
adjusted.
3. Air leak around cap (12).
4. Dirtor damaged ”O”rings on
spoolvalve (14).
5. Clogged air passage in valve
housing.
1. Inadequate air supply.
2. Clogged air passage in valve
housing.
1. Piston not fully retracted.
2. Damaged“0” ring (11)inside
valve housing.
1. Improper adjustment or align-
ment betweenadjustmentscrew
and button bleed valve.
2. Feed control valves (23)
Improperly adjusted or dirty.
3. Air leak around cap (12).
4. Damaged“0” rings in muffler
cap, valve housing or spool valve
or seals on piston.
5. Flogged air passage in valve
housing.
CORRECTIVEACTION
1. Check air supply for correct regulator adjustment (90 p.s.i.g.
max. when tool is operating).
2. Referto set-up procedure, page 1.
3. Checkfor damage to”0” ring. Checkand insure caps are properly
tightened.
4. Referto valve section, page 9, and removespool valve. Inspect,
clean and replace “0” rings.
5 Removevalve housing from tool. Disassembleand blow all air
passagesclear of debris.
1. Check air supply for correct regulator adjustment.
2. Removevalve housing from tool. Disassembleand blow all air
passagesclear of debris.
1. Insure piston is not obstructed and is returned all the way back.
2 Removevalve housing from tool. Replace ”0”rings.
1. Referto set-up procedure, page 1.
2. Check adjustment, refer to page 2. Remove,inspect and clean.
3. Checkfor damageto”0” ring. Checkand insure caps are properly
tightened.
4. Disassemble,inspect and replace “0” rings and/or seals.
5. Remove valve housing from tool. Disassemble and blow air
passages clear of debris.
PN 49999-070