Cooper Tools Quackenbush 120SC-112 Installation and operating instructions

1
Operation & Service Manual
823060 12/01
120SC-112 SELF-COLLETING DRILLS
Houston Operation
7007 Pinemont
Houston, TX 77040
Recoules Operation
Zone industrielle - B.P.28
Avenue Maurice Chevalier
77831 Ozoir-la-Ferriere Cedex France

2
•Beforethetool isconnectedtotheairsupply,thethrottleshould
bechecked for proper operation (i.e., throttle valve moves freely
and returns to closed position).
• Before removing a tool from service or changing drill bits, make
surethe airlineisshutoff anddrainedofair.This willpreventthe
tool from operating if the throttle is accidently engaged.
•Cuttingtoolsusedwiththesedrillmotorsaresharp.Handlethem
carefully to avoid injury.
• The collet and mandrel must be inserted into a properly sized
pre-drilled hole before starting the tool. An improperly sized pre-
drilled hole prevents the mandrel from engaging the collet and
could result in slippage of the tool. An improperly selected collet
and mandrel can also result in slippage of the tool.
Drilling or other use of this tool may produce hazardous fumes
and/or dust. To avoid adverse health effects utilize adequate
ventilation and/or a respirator. Read the material safety data
sheet of any cutting fluids or materials involved in the drilling
process.
Some non-ferrous metal chips (or dusts) are combustible. Ex-
amples: Aluminum, magnesium, Titanium, and Zirconium. See
the material safety data sheets for combustibility of materials
drilled. Never collect spark generating material with combustible
material. Examples: Collecting both steel and aluminum or steel
and titanium.
Quackenbush drills are often used with lubricant or cooling
systems which must be properly maintained to avoid leakage.
Failure to do so can result in serious injuries from slipping on oily
surfaces.
Foryour safetyand thesafety of others, read andunderstand
the safety recommendations and operating instructions be-
fore operating any drill motor.
Always wear protective equipment:
Foradditionalinformationoneyeprotection,readthelatestedition
of ANSI Z87.1, Occupational and Educational Eye and Face
Protection. This standard is available from the American National
Standards Institute, Inc., 25 West 43nd Street, 4th Floor, New
York, N.Y. 10036.
Hearing protection is recommended in high noise areas (above
85dBA). Close proximity of additional tools, reflective surfaces,
process noises, etc., can contribute substantially to the sound
level experienced by the operator.
Follow good machine shop practices. Rotating shafts and moving
components entangle and entrap, and may result in serious
injuries. Never wear long hair, loose-fitting clothes, gloves, ties,
or jewelry when working with or near a drill of any type.
Quackenbush drills are designed to operate on 90psig (6.2 bar)
maximum air pressure using the proper hose. Excessive air
pressureincreasestheloadsand stresses on tool parts and drills,
and may result in breakage. The installation of a filter-regulator-
lubricator in the air supply line ahead of the tool is highly recom-
mended.
Safety Recommendations
!
Do not wear loose fitting clothes,
long hair, gloves, ties or jewelry.
WARNING
CAUTION!
Personal hearing protection is
recommended when operating
or working near this tool.
WARNING!
Impact resistant eye protection
must be worn while operating
or working near this tool.
CAUTION!
WARNING
!
Wear respirator where
necessary.
CAUTION!
CAUTION!
Slip and fall hazard.
Lubricant and coolant systems must
be properly maintained to avoid
leakage.
Hoses must be organized and care
taken to avoid tripping.

3
Due to the number and variety of tooling applications, the user's
methods engineering departments, ect., must consider any haz-
ards that may be associated with each specific application of this
product and provide adequate operator protection from inadvert-
ent contact with any moving components. The clamping and feed
mechanisms of self-colleting drill motors are exposed for visibility
and can move when the air supply is connected or disconnected.
To avoid injury, keep fingers and hands away from these areas
when handling or operating this tool.
Some individuals are susceptible to disorders of the hands and
arms when exposed to vibration and/or tasks which involve
repetitive work motions. Those individuals predisposed to vascu-
latory or circulatory problems may be particularly susceptible.
Cumulativetraumadisorderssuchascarpaltunnelsyndromeand
tendinitis can be caused or aggravated by repetitious, forceful
exertionsof the hands and arms. These disorders developgradu-
ally over periods of weeks, months, and years. Tasks should be
performed in such a manner that the wrists are maintained in a
neutralposition,whichisnotflexed,hyperextended,orturnedside
to side. Stressful postures should be avoided and can be con-
trolled through tool selection and work location.
Safety Recommendations
Any tool operator should be aware of the following warning signs
and symptoms so that a problem can be addressed before it
becomes a debilitating injury. Any user suffering from prolonged
symptoms of tingling, numbness, blanching of fingers, clumsi-
ness or weakened grip, inability to hold objects, nocturnal pain in
the hand, or any other disorder of the shoulders, arms, wrists, or
fingersshould notify their employer so that areviewofwhat steps
might be taken to prevent further occurances. These steps might
include but are not limited to, repositioning the workpiece or
redesigning the workstation, reassigning tool users to other jobs,
rotating jobs, changing worker pace, and/or changing the type of
tool used so as to minimize stress on the operator. Some tasks
may require more than one type of tool to obtain the optimum
operator/ tool/ task relationship.
The following recommendations will help reduce or moderate the
effectsofrepetitiveworkmotions.Theoperatorofanydrillshould:
• Use a minimum hand grip force consistent with
proper control and safe operation
• Keep body and hands warm and dry
• Avoid anything that inhibits blood circulation
— Smoking Tobacco
— Cold Temperatures
— Certain Drugs
• Avoid awkward postures
• Keep wrists as straight as possible
• Interrupt work, activities, or rotate jobs to provide
periods free from repetitive work motions.
Safety Labels
The safety labels found on this tool are an essential part of this
product.Labelsshouldnotberemoved.Labelsshouldbechecked
periodically for legibility. Replace safety labels when missing or
when the information can no longer be read. Replacement labels
can be ordered by the part numbers shown on this page.
WARNING!
Repetitive work motions can
injure your hands and arms.
WARNING!
Exposure to vibration can
injure your hands and arms.
Extension Neutral Flexion Radial Deviation Neutral Ulnar Deviation
Avoid Avoid Avoid OK Avoid OK
WARNING
!
Keep hands away from
clamping and feed
mechanisms. Clamp
mechanism moves when
drilling and connecting
or removing air supply.
CAUTION
!
Read operating instructions before operating tool.
OPERATING
INSTRUCTIONS
203245
- Wear impact resistant eye protection. - Hearing protection is recommended. - Avoid contact with rotating spindle or cutter. - Wear respirator as necessary. - Exposure to repetitive work motion and/or vibration may be harmful
to your hands and arms.
WARNING
!
203246
WARNING
!
Keep hands away from clamping and feed mechanisms. Clamp mechanism moves when drilling and connecting or removing air supply.
624242
WARNING
!
Keep hands away from this area when handling or operating tool. Clamp mechanism moves when drilling and connecting or removing air supply.
202902
202902
2
03245
203246
624242

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Safety Recommendations
Index & Major Tool Components
Introduction
Air and Hydraulic System Diagrams
Backhead Disassembly & Motor Disassembly
Spindle Adjustment Disassembly
Quill & Pressure Foot Removal
How to Change Quills
Feed Clamp Disassembly
Dwell Valve Disassembly
Disassembly of Feed Rate Adjustment Valve
Unclamp Check Valve Disassembly
Retract and Dwell Valve Disassembly
Hydraulic Fluid Reservoir Disassembly
Trigger Disassembly
Pilot Valve Disassembly
Filling and Bleeding the Hydraulic System
2&3
4
5
6-9
10&11
11&12
13
13&14
14&17
17
18
19
20
21
22
23
24
Index Tool Adjustments
Major Tool Components
Trouble Shooting
Drill Assembly & Parts List
Maintenance Kit
Gear Set Assemblies
Accessories
Template Boss
Jig Collet Foot Attachments
High Curvature Pad Assembly
Regulator Assembly
Booster Pump Assembly
Mist Lubricator Assembly
Mist Lubricator (Pressure Fill)
Mist Lubricator (Pump Fill)
Mist Lubricator Mount
24
25
26
27-31
32
33&34
35
35
35
36
36
36
37
38
39
Major Tool Components
Special Tools
Collet Guide
Template Boss
(See Accessories)
Accessory Air
Port (1/4-18 NPT)
Adjustable Tail
Pad
Spindle
Adjustment
Clamp
Air Inlet Bushing
(3/8-18 FNPT)
Motor
Exhaust
Feed Sleeve
Dwell
Adjustment Depth Control
Nut Depth Control
Clamp
Pressure Foot
Nut Tool (623014)
Trigger Lock Tool
(623015)
Variable Spacing
Pressure Foot
Booster Pump
Trigger Trigger Lock
Backhead
Spindle
Adjustment
Bulkhead Removal
Tool (622849)
Feed Rate
Adjustment
HydraulicFluid
Reservoir Fitting

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The 120SC-112 drill is an air operated, hydraulically con-
trolledtoolthatautomaticallyclampstothematerial,drillsand
countersinks close tolerance holes in one operation.
The120SC-112 will producehigh qualityholes in aluminum,
steel,titaniumandcompositematerialsprimarilyfoundinthe
aircraft/aerospace industries. The 120SC-112 has been de-
signed using state-of-the-art technology that provides maxi-
mum power, minimum weight and the highest degree of
accuracy for demanding hole preparation requirements.
Technical Data
FeedStroke: Feedstroke of the120SC-112 is1.1inchesto
drill and countersink in 1 inch stacked material. The feed
stroke is unaffected by the collet stroke.
Collet Stroke: The 120SC-112 will clamp throughout its .5
inch stroke. Collet stroke is unaffected by feed stroke.
SpindleAdjustment: Thespindleadjustmentof.375inch
allows for drill length variations. See Spindle Adjustment
information on page 24.
CountersinkDepthControl:Amicrometeradjustmentpro-
vides for countersink stop repeatability within .001 inch.
CutterSizes:The120SC-112willaccommodate.375diam-
eter drills without countersink and .328 diameter drills with
.625 countersink diameter.
FeedRate: Anadjustable drillfeedratemechanismenables
the 120SC-112 to drill from 5 seconds per inch to 1 minute
perinch.SeeFeedRateAdjustmentinformationonpage22.
Cutter to Collet Spacing: The cutter to collet distance is
adjustable between .875 inch minimum to 3.50 inch maxi-
mum.
Coolant: The 120SC-112 has a drill point coolant port in the
pressure foot. A coolant mist generator is available. (See
Accessories Page 36)
Air Motor: The air motor develops 1.2 horsepower when
supplied with air at 90 p.s.i.
Air Consumption: Air consumption of the 120SC-112 is 45
c.f.m. at 90 p.s.i. dynamic.
Introduction and General Information
Weight: Tool weight with the steel pressure foot is 12
pounds.
Spindle Speeds: Ten geared spindle speeds are available:
270, 470, 700, 900, 1150, 2200,3500, 5500, 7000,14,000 &
23,500 RPM. See pages 33 and 34 for gear set assembly.
Configurations. Any gear set can be used with the 120SC-
112toolTriggerLock:Atriggerlockisprovidedwhichallows
the tool to be locked in the "Operate" position. With the lock
activated,thetoolwillrunthroughtheclamp,feedandretract
cycles,butitwillnotunclamporstopthemotoruntilthetrigger
lock is manually released.
Tool Start-Up
The 120SC-112 is shipped from the factory equipped to the
customer's specifications: spindle RPM, spindle to accom-
modatecuttertypedesired,pressurefoottype,colletguideto
accommodate collet desired, and optional booster pump (if
required).
Afterunpacking,examinethecustomer-specifiedequipment
on the 120SC-112 tool to verify type and speed of compo-
nents.
Attachairlineto3/8-18NPTinletbushing.Ifquickdisconnect
fittings are used, 3/8 in. ID are minimum. The 120SC-112
requiresa supply ofclean 90-100PSIair. Airconsumption is
45CFMat90PSI.Theuseofthein-linelubricatorwillprovide
the proper lubrication for the air motor and will significantly
increase the tool life expectancy.
BecauseO-ringsareextensivelyusedtosealsystemswithin
the tool, the elimination of foreign particles and other con-
taminantswillreducethepossibilityofdamagetotheseparts.
Always inspect O-rings for damage or wear and replace as
required. The use of silicone O-ring lubricant is strongly
recommended during reassembly. The addition of oil in the
air line will also increase motor and valve life as well as the
life of the O-rings. Avoid the use of synthetic lubricants to
prevent damage to O-rings and seals.
WEIGHT
AIR CONSUMPTION
HORSE POWER
O/A LENGTH
STROKE
COLLET STROKE
COUNTERSINK
FEED RATE
SPINDLE SPEEDS
DRILLING THRUST
CLAMP FORCE
(W ASSIST SPRING)
(W ASSIST SPRING)
(W/O ASSIST SPRING)
SPINDLE ADJUSTMENT
MAX. DRILL SIZES
COLLET FOOT SPACING
SPINDLE
COOLANT
120SC-112 SELF-COLLETING DRILL SPECIFICATIONS
12 LBS. MAX. W/STEEL FOOT
45 C.F M. @ 90 P.S.I. DYNAMIC
APPROX.1.2 @ 90 P.S.I.
13.04 IN. MAX WITH SPINDLE ADJUST AT FULL EXTENSION
1.1 IN. (DRILL &C/SINK 1 IN. STACK)
.5 IN. (NO LOSS OF FEED STROKE)
COUNTERSINK STOP REPEATS WITHIN .001 IN.
MIN. 5 SEC. PER INCH & MAX. 1 MIN. PER INCH
270, 470, 700, 900, 1150, 2200,3500, 5500, 7000,14,000 & 23,500 RPM
234 LBS. MAX. (UNREGULATED AIR)
548 LBS. START CLAMP STROKE (UNREGULATED AIR)
460 LBS. FULL CLAMP STROKE (UNREGULATED AIR)
290 LBS. (UNREGULATED AIR)
.375 IN. ADJUSTMENT TO ALLOW FOR DRILL LENGTH VARIATIONS
.375 (NO C/SINK), .328 (.625 C/SINK DIA.)
.875 IN. MIN.—3.50 IN. MAX.
.500 IN. DIA: TUBE W/1/4-28 & 3/8-16 IN. THD. FOR l.D.
THREAD TYPE DRILLS OR 1/4-28 TAPER-LOK TYPE DRILLS.
AIR BLAST PORT & DRILL POINT PORT IN TEMPLATE STD.,
COOLANT MIST GENERATOR AVAILABLE.

6

7

8

9

10
I. Backhead Disassembly
1. Remove four 1/4-20 cap screws.
1.Removereartwo5/32"hexheadcapscrewsand
remove muffler subassembly.
2. Pull backhead with spindle attached straight out
of tool. NOTE: Three O-rings in recessed cavities
shouldremaininplaceinbackheadmatingsurface.
II. Muffler & Air Motor Disassembly
2. Remove all four 5/32" hex head cap screws to
remove and disassembly muffler subassembly.

11
3. Remove retainer ring that holds in motor.
1.Usingsuitablespannerwrenchtounscrewbearing
retaining nut.
III. Spindle Adjustment Disassembly
2. Use hex wrench to loosen and remove tapered
locking screw in rear housing.
4. Tap housing gently on surface to remove air
motor. The complete motor includes rotor with
blades, cylinder, and front and rear bearing plates.
The exhaust slots on the should be indexed 180
degrees away from the exhaust on the housing
when being placed back into the tool.
NOTE: Spindle adjustment disassembly is necessary only to service bearings and to change spindle.
Otherwise, the backhead assembly can be removed intact to service other internal assemblies, such as
the air motor.

12
3.Unscrew spindle adjustmentnut andremove nut
with spindle.
4. Tap spindle adjustment nut to remove spindle
and duplex ball bearings.
5. Unscrew bearing lock nut and bearing lock nut
washer with special bearing lock nut assembly tool
623075.
6. To remove spindle gear, remove retaining ring
and slide gear off spindle.
NOTE: It may be necessary to remove four socket
cap screws which retain gear set before removing
spindle gear.
NOTE: To reassemble, 1st duplex ball bearing
must seat firmly on spindle shoulder. Add 2nd ball
bearingback-to-backwithpartnumberonbearings
facingawayfromeachother.Thenaddbearinglock
washer and bearing lock nut. Tighten with special
tool until inner race seats solid. Screw in bearing
adjustmentnutandbearingretainingnutandtighten
until nut seats solid.
NOTE: Bearing lock nut and bearing retaining nut
mustbeseatedsolidlytopreventend;layinspindle
and cutter.

13
IV. Quill & Pressure Foot Removal
1.Removepressurefootnutwithappropriatespan-
ner wrench or with special pressure foot nut tool
623014.
1. Follow quill and pressure foot disassembly
instruction in IV above.
NOTE: If tool is equipped with template boss,
remove three socket cap screws and remove
template boss.
2. Pull pressure foot forward to remove quill and
pressure foot from tool housing and feed sleeve.
NOTE:It isnotnecessary toremove thebackhead
and gear assembly to replace or service the quill
and pressure foot.
V. How to Change Quills
2. Loosen depth control clamp.

14
3. Unscrew depth adjustment nut and slide off end
of quill.
4. Unscrew quill from pressure foot.
NOTE: Follow instruction in IV to remove quill and
pressure foot.
1. Remove retainer ring 812231 and linkage clevis
pin 625649.
5.Toreassemble,installspirallockretainingringin
groove provided above threads on large diameter
of quill.
NOTE:Thespirallockretainingringmustbewound
to follow the threads in quill so that the spiral lock
ring will not unwind when quill is threaded into
pressure foot. Install spacer.
6. To replace spindle, follow step 3 to remove
spindle adjustment assembly. Install appropriate
spindle for cutter to be used and reassemble.
VI. Feed Clamp Disassembly
retainer ring &
linkage clevis pin
2. With air connected, unscrew pull rod bushing
625663.

15
3. With rod push in on the pull rod to remove
pressureonliftfingerandtheliftfingerwillcomeout.
4. The following steps apply only if the hydraulic
system requires servicing. 5. Remove bleed port screw from side of tool.
Remove 1/8" steel ball from bleed port with small
magnet. Bleed hydraulic fluid by pulling and push-
ing feed sleeve. Fluid will run out of opening.
6. Turn tool around and remove three button head
screws which hold the rear bulkhead in place. 7.Insertrodthroughendoffeedsleeveandpushto
remove rear bulkhead with clamp/unclamp piston
and collet spring assembly.
NOTE: Examine O-ring on rear bulkhead and re-
place if damaged.

16
8. Expand and remove first retaining ring from feed
sleeve. 9. Remove rear feed piston using internal pliers. Hold piston on internal diameter pull piston out.
10. Expand and remove second retaining ring from
feed sleeve. 11. Compress front bulkhead retaining ring.

17
12. Pull front bulkhead and
feed sleeve out.
13. Compress and remove large
retaining ring located at the rear of
tool from large diameter bore of
cavity. Be careful not to score or
scratch inner bore.
14. Screw threaded end of bulk-
head removal tool 622849 into
threadedholeinair/hydraulicbulk-
headandpulltoremovefromrear
of tool. Read notes below.
NOTE: The O-rings on the outer diameter of the air/hydraulic bulkhead must pass by two retaining ring
grooves.Before reinsertingthebulkhead, packthe retainingringgrooves withO-ring lubricanttoprevent
O-ring damage.
NOTE:Asmallorificeontherightside ofthetoolhousingisprovidedtocheckthecondition ofthe O-rings
on the air/hydraulic bulkhead. Air seepage indicates a damaged O-ring on the air side; hydraulic fluid
seepage indicates O-ring damage on the fluid side.
NOTE: One large retaining ring will remain in the inner bore. It should not be necessary to remove this
ring.
1. Remove needle valve from housing with hex
wrench.
VII. Dwell Valve Assembly

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VIII. Disassembly of Feed Rate Adjustment Valve
1. Unscrew feed adjustment body with wrench and
remove.
2.Unscrew pipeplug withhex wrenchand remove.
3. Push out feed rate adjustment valve and screen
with wrench.
NOTE: Exercise caution when disassembling so
thatnosmallcomponententersintootherhydraulic
openings or cavities.
4. Use installation tool 624763 for installation.

19
IX. Disassembly of Unclamp Check Valve
1. Remove retaining ring and valve retaining plug.
Remove spool and spring.
3. Using removal and installation tool 632424, re-
move valve sleeve. Carefully inspect O-rings for
damage and replace if necessary.
NOTE: When installing sleeve use O-ring lubrica-
tion.
2. Lift spool and spring out of cavity and place in
clean area.

20
X. Retract and Dwell Valve Disassembly
1. Remove retaining ring on valve retaining plug.
3.Removeretractanddwellvalvespoolandspring.
2. Lift out latching spool.
4. Using removal and installation tool 632424. Re-
move sleeve.
5.Whenreassembling, applyO-ringlubricant liber-
ally to prevent damage to O-rings as they are
pushed past ports on the inside cavity. NOTE:
Springon endof spoolshouldbe retainedin holein
end of spool with grease during reassembly.