Deprag 346-138U User manual

012457EN
Operating Instruction Booklet
PneumaticScrewdriver
346-138U 396188 A
346-238U 396188 B
346-738U 396188 C
346-338U 396188 D
346-438U 396188 E
MINIMAT

2
Dear Customer:
Thistool isthe resultofmore than75yearsofexperiencein thedesign and
manufacturing ofpneumatictoolsforthe industrial market.
Wekindlyask thatyou read theseoperating instructionscarefullysothatyou
will be able tousethistoolsafelyandfor manyyears tocome.
If you need additional information,pleasecontact your DEPRAG
Representative,one ofour international supportofficesorusdirectat
DEPRAG.Wewill be happytoanswer anyquestions.
Pleasevisitour web site: www.deprag.com
Content
1SAFETYTIPS................................................................................................................3
1.1 GeneralSafetyTips.....................................................................................................3
1.2 GeneralSafetyTipsforPneumaticScrewdriverSpindles...........................................4
1.3 OwnerObligation.........................................................................................................5
1.4 OperatorObligation.....................................................................................................5
1.5 WarrantyandLiability..................................................................................................5
1.6 SymbolDescription......................................................................................................6
1.7 ObserveEnvironmentalRegulations...........................................................................7
2DESIGNATEDEQUIPMENTUSE.................................................................................8
3INSTALLATION..............................................................................................................8
4OPERATION................................................................................................................10
4.1 RangeandExchangeofClutchSpring......................................................................11
4.2 Torque Adjustment....................................................................................................14
5HANDLING...................................................................................................................15
6ASSEMBLY-DISASSEMBLY......................................................................................16
6.1 SparePartsDrawing..................................................................................................18
6.2 DimensionalDrawing.................................................................................................28
7MAINTENANCEAND UPKEEP...................................................................................29
7.1 WearParts.................................................................................................................29
8TROUBLE SHOOTING................................................................................................30
9DELIVERYCAPACITY.................................................................................................32
10 ACCESSORIES -OPTIONAL EQUIPMENT..............................................................32
11 STORAGE..................................................................................................................34
12 TECHNICAL DATA.....................................................................................................35
13 DISPOSAL..................................................................................................................36
14 CONFORMITYDECLARATION.................................................................................37
15 SERVICELOCATIONS AND AUTHORIZEDPARTNERS.........................................38

3
1SafetyTips
1.1GeneralSafetyTips
Beforeoperating tool makesureto carefullyreadand
observethisoperating instruction.
Generally,theoperator ofthe equipmentand/ormachineryisresponsible for
the equipment’sperfect condition and operation,while observing all necessary
safetyregulations.The equipmentand/or machineryhasbeen constructed in
accordancewiththe newestlevel oftechnologywhile recognizingall
necessarysafety-related requirements.Nevertheless,while operating the
equipmentand/or machinerythereisariskofbodilyharmtothe operator as
well as damagetoequipmentand/or machineryand other property.
Operatethe equipment and/ormachineryonlyif equipment/machinery
· Isused forthe task it was designed for
· is inperfectworkingcondition andsafetouse.
It isimportanttoobservethe technical dataofthe equipment, especiallyin
regardstotheenvironmental temperatures. The designated area ofuseforthis
equipmentisclearlydescribed in chapter Designated EquipmentUse and
thoserequirementshavetobe observed aswell.Prerequisiteforthe safe
conduct andthe uninterrupted operationofthe equipment, isthe knowledge of
the basicsafetytipsandthesafetyregulations.Additionally,all current
regulationsforasafeoperational area,for accident-prevention guidelinesof
electrical and mechanical installations, aswell asnoisesuppression demands
mustbe observed.Duringanymaintenanceorrepair work, acleanwork
surfaceisrecommended.Also,itisnotrecommended toeither eator smoke
during repair ormaintenance. Arbitrarychangesmade tothe equipment,which
altersitsdesignateduse,voidsthe warrantyand cancelsthe manufacturers
liability.
· The toolis notinsulated toprotectagainstanelectricalpower surge.
· Itisnotrecommended tousethistoolin explosivehazardous
environments,unlessit wasspecificallydesigned forsuchause.
The operating instruction booklet,especiallythe safetysymbolsandsafetytips
attachedtothe equipmentor included inthe documentation,mustbeobserved
at alltimesbyall persons gettingintocontact withtheequipment.

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1.2GeneralSafetyTipsforPneumaticScrewdriverSpindles
·
Disconnectthetoolfromthe airsupply, when changing bits or
when readjusting clutch.
· Donotwear wide clothingorjewelry, fortheycan beseizedby
movable parts. Wear ahairnet ifoperator haslonghair.
· Keep handsoff theinstalledbitorsocket.
· Injuryispossible,if the driver reacts withan unexpectedmotionor when
driveris usedwithabrokenbit.
· Keephandsawayfromholdingfixture (ifused).Thisapplies especiallywhen
looseningscrews inatight area.Thereis arisk ofsqueezing fingers b
etween
holding bracket and tool.Makesurethat anybracketusedis correctly
installed.
· An unexpectedmotion of thebitorsocketmaycreateadangeroussituation.
· Especially, when operatinganimpact wrench,it ispossiblethataninjury
occurs, ifthebitbreaks [flying splinters].
· Whenusing toolwithbit-adapter or bit-extension (i.e. Magnetic Bitholder),
makesure,thatthoseitems areingoodcondition andwell suitedfor the
applicationwiththistool.
· When usingascrewdriver stand,makesure thatthetoolis
securelymounted.If nostandisused, makesuretohaveasolid
stancetoabsorbthetools’torquereaction force.
· Ifyou are notabletoabsorbthetorquereactionforce,usea
holding fixtureorside handleonthescrewdriver.
· Afterturning-offthetool,thebit will continuetorotate[inertia].
· Donotexceed themaximumallowableairpressure.Apressure regulator
hastobeinstalled, whichregulatestheairpressurebeforeitreachesthe
tool.
· Avoidpressure tofall belowtheminimumallowable airpressure,because
the clutchcannotshut-off safely. Thismaycausean increasedtorque
reaction force, resultinginriskstooperator,toolor product.
· Incaseofan interruptionof the air supply, makesuretowait untiltoolhas
cometoastand still, prior toreactivatingtool.

5
1.3OwnerObligation
The owner isobligedtoonlyletpersons operatetheequipment,who
· are familiarwithbasicwork environmentsafetyrules andaccident-
preventing regulations.Also,thosepersons musthavebeen instructedin
the correctuseofthe equipment.
· haveread andunderstood all safetyand warning notificationsin the
OperatingInstructionBooklet,aswell as allotherdocumentation
pertainingtothisequipment.
· checkandconfirmat regularintervals,thatasafetyoriented operationis
guaranteed.
Onlyqualifiedandauthorizedpersonnel is allowed tooperate, maintainand
repair this equipment.Amalfunction, whichimpairs operator safety, mustbe
immediatelyremoved.
1.4Operator Obligation
Personnel,who isengaged inthe operationofthe equipment,mustalways be
committed to
· observethebasicsafetyandaccident preventing regulations,
· read andobservethe safetyand warning notifications ofthisoperating
instructionbooklet.
1.5WarrantyandLiability
Unless otherwisespecified,our “General Salesand DeliveryConditions”
apply.Warrantyand liabilityclaimsin regardstopersonsor equipment
damagesareinvalid, ifone or several ofthefollowing causesapply:
· Useoftheequipment inanon-designated application.
· Improperinstallation, operation, serviceormaintenanceofthemachine.
·
Operationofthe machine witheitherdefectiveor removed safetyand
protectiondevices.
· Non-
observanceofthe requirements stated in the operating instruction
booklet
,in regardstotransportation,storage,mounting,installation,
operation,maintenanceand serviceoftheequipment.
· Structural changeor adjustmentonthe equipmenttoanon-
designated
use.
· Inadequatesupervisionofwear parts.
· Improperrepair,inspection ormaintenance.
·
Catastrophic casesbecauseofawar,actsofgod or otherreasonswhich
are beyond ourcontrol.

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1.6Symbol Description
Readand observetheOperating Instruction Booklet, prior
toand during operation oftool.
DANGER
Reference toan immediatedangertoaperson.Mayleadto
seriousinjuriesor evendeath,ifunobserved!
Properlyrecycle environmentallydamaging grease,cooling
agents ordetergents.
RECOMMENDATIONS
Importantoradditional information onthe equipmentor inthe
documentation.
Useeyeprotectionor wear safetygoggles.
Wearhearingprotection.
Warningagainsthand-injuries.
Attention:Keepawayyour handsfromareas,whicharemarked
withthissymbol!
Hands maybe crushed,seizedorotherwiseinjured.
ESD-protected area
Equipmentmaybe damaged ordestroyed byan electrostatic
discharge.
WasteOil

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Maintenanceand repair onhydraulicand pneumaticequipment
mayonlybe performed byspeciallytrained personnel!
Disconnectequipmentfromairsupply, priortorepair of
pneumatic orhydraulicequipment.
Provide regular preventivemaintenanceon hosesandairlines.
Exchange hoselines,even ifthere isnovisible damage!
(Observecorresponding requirementsofthe manufacturer!)
Afterrepair and maintenance,check thefollowing items:
· makesurealldetached andre-attachedconnectionsare
solid.
· confirm thatremoved covers, screensor filterswere re-
installed
· During disconnecting orreconnectingof anair-operated
equipment, injurymayoccurduetoawhipping air-hose
Afterconclusion of maintenanceor repair andpriortostartof
operation,makesure to
· removeall materials,toolsandothersuppliesneededforthe
maintenanceor repair fromworkarea oftheequipment
· removeleaking liquid oroils
· makesureallsafetydevices onthe equipment workperfectly!
1.7ObserveEnvironmentalRegulations
Whenworking onorwiththe equipment,itis imperativeto
observeall requirementsinregardstowaste-disposal and
proper recycling.
Especiallyduringinstallation,repairormaintenance,water
damaging agentssuchas
· lubricatinggreaseand oil
· hydraulic fluid
· coolingagents
· solvent-containingcleaningagents
mustnot leakintothe groundorintothesewage system!
Suchmaterialsmustbestored,transported,containedand
recycled insuitablecontainers.

8
2DesignatedEquipment Use
DEPRAG MICROMAT/MINIMAT-Screwdrivers ofstraightshapeareused for
manual torque
-
controlled assemblies, preferablyfor vertical applications.
3Installation
·
Blowout airlineandpressure hose,prior toconnection ittothetool.
· Makesure,thatall air lineshaveasufficientcross-section(see technical
data)andhosesmustbefree ofbends andkinks. The hoselengthshould
not exceed2meters.
· All DEPRAGScrewdrivers, maybe operatedeither withorwithout
lubricatedair(see paragraph: Maintenanceand Upkeep). Best resultsare
achieved, when machineislubricatedwith1–2dropsofoil per1m3.
Whenoperatingwithoilfree air,aperformancereductionof upto20%
occursandmaintenancerequirementsincreases!
· Connect the equipment asfollows:
a) for standardoperation connectequipmenttoamaintenanceunit,
consistingofFilter withcondensationreservoir, Regulatorand Oiler.
Whenchoosing amaintenanceunit, observeair consumption ratefor
the tool(see TechnicalData).
Air ConsumptionThread Size
PartNo.
0,05 -0,5m³/min ¼” 820454 A
0,15 –1,5m³/min
½” 820455 A
0,8–6,0m³/min ¾” 821608 A
b) for theusewithminimal lubrication connect toafilter-regulator
consistingofFilter withcondensationreservoir andpressure regulator
Air ConsumptionThread Size
PartNo.
0,05 -0,5m³/min ¼” 822408 A
0,15 –0,9m³/min
3¤8” 826981 A
0,5–1,5m³/min ½” 822409 A
0,8–6,0m³/min ¾” 826982 A
Eachin connectionwithaPoint-of-UseOiler (PartNo.378077 A)
c)for oilfree operation,connecttoFilter/Regulator,consistingofFilter
withcondensationreservoir andPressure Regulator.
Air ConsumptionThread Size
PartNo.
0,05 -0,5m³/min ¼” 822408 A
0,15 –0,9m³/min
3¤8” 826981 A
0,5–1,5m³/min ½” 822409 A
0,8–6,0m³/min ¾” 826982 A

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OUR RECOMMENDATION: The preferred lubricatingmethod for the
screwdriver spindles mountedinfixtures,brackets,machines,etc.,eachin
connection withacontroller,ismethodb) withPoint-of-UseOiler.
· Checkpressureat directlyon the machine.The Regulatorneedstobe
adjusted toanairflowbetween 5.0(71PSI)and6.3bar(90PSI).Ahigher
pressureleadstoincreased wear andtear.Alower pressure maylead to
clutchnot being abletocorrectlyshut-offthe motor.
Inregardstoair-qualityaccordingtoISO8573-1, werecommend:
CLASS
RESIDUE
OF OIL
RESIDUEOF DUST RESIDUEOF WATER
Content
mg/m³
Particle
Size mm
Concentration
max. mg/m³
DewPoint
oC
Pressure
Concentration
max. g/m³
Lubricated Air 4 5 15 8 +3 6
DryAir 3 1 5 5 -20 0,88
Picture:ConnectionofaMINIMAT-Screwdriver

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RecommendedAccessories
Balancer, spring loaded
WEIGHT CAPACITY
FROM –TO (kg)
MAX. CORD LENGTH
(m)
WEIGHT
(kg) PART-NO.
0–0,5 1,6 0,5 827676 A
0,3–1,2 1,6 0,5 827677 A
1–2 1,6 0,5 827678 A
2–3 2 1,2 808690 A
Hose Balancer, spring loaded
WEIGHT CAPACITY
FROM - TO
(kg)
MAX. HOSE
LENGTH
(m)
HOSE
I.D.
(mm)
CONNECTION -
THREAD
WEIGHT
(kg) PART-NO.
0,4–1,2 1,2 824069 A
1,2–2,2 1,3 824069 B
2,2–3,0
0,8 5 G¼ i/G¼a
1,4 824069 C
PneumaticSpiral Hose
AIRCONSUMPTION
FROM – TO
(m³/min)
HOSE
INNER-Æ
(mm)
OPERATING RANGE
(m) PART NO.
0–0,1 4 0,8–2 346697 D
>0,1–0,3 6 1 –2,5 346697 E
>0,3–0,5 6 1 –2,5 346697 F
4Operation
Unlessotherwiserequested thedriver ispresettomax.torque withthe
strongest clutchspring installed on theclutch.Adjustclutchtothe required
torquevalue.Ifnecessary, exchange clutchspring.The required torque
adjustment can bechecked,using aDEPRAG TorqueWrenchor
Dynamometer (seeDEPRAG catalogsD3020andD3022). Thisequipment
can alsobeused tore-adjustthetorqueof the Screwdriver.
Tooperatetheclutch,usingaclutchspring whicheither
surpassesorfallsbelowitsspecifiedtorque range,leadstoa
reductionofthe torque accuracy.
Push–tostart –screwdriver!
The flowpressure should notdropbelow5bar/71PSI –reducedoutput!

11
Attention:
The screwdriver isfurnishedwitha reversiblemotor and a
clutchtorquing outin right-hand rotation (sothatifyou look
atthescrewdriver fromtheairinletsideitrotatesclockwise).
Attention:
Usethe screwdriver346-338Uand346-438Uonlywithhandle
or parallelogramstand.
4.1Rangeand ExchangeofClutchSpring
The torque range oftheDEPRAG Screwdriver is adjustable.Pleaseseea
listing forthetorquerangesofthe color
-
codedspringsbelow.
Type346-138U, 346-238Uand 346-738U
TorqueRangeoftheindividualclutchspring:
PARTNO.
WIRE-Æ
COLOR
TORQUE "MIN." TORQUE "MAX."
353796 4,0mm black appx. 3,5Nm/ 31 in.lbs appx. 8/9Nm/ 71/80 in.lbs
353795 3,2mm blue appx. 2,0Nm/ 18 in.lbs. appx. 4,4Nm/ 39 in.lbs
All torquevalues arebased on90-PSI (6,3bar)airpressure. Torque values
are estimateddatawhichmaydiffer–dependingon thetype of screwjoint.
Type346-338Uand 346-438U
TorqueRangeoftheindividualclutchspring:
PART-NO.
WIRE-ÆCOLOR
TORQUE - MIN. TORQUE - MAX.
328562 5,6mm white appx. 10,0Nm/ 89 in.lbs.
appx. 24,0Nm/ 212 in.lbs.
328024 5,0mm black appx. 6,0Nm/ 53 in.lbs. appx. 18,0Nm/ 159 in.lbs.
328025 3,2mm blue appx. 3,0Nm/ 27 in.lbs. appx. 6,0Nm/ 53 in.lbs.
328026 2,5mm green appx. 2,0Nm/ 18 in.lbs. appx. 4,0Nm/ 35 in.lbs.
All torquevalues arebased on90-PSI (6,3bar)airpressure. Torque values
are estimateddataw
hichmaydiffer
–
dependingon thetype of screwjoint.
Toavoidloosingindividualsmall parts, it isrecommendedto
onlydisassemblethe machine ontopof aflatworksurface.

12
Exchangeofclutchspring (seepicture)
1.Disconnectscrewdriver fromairsupply.
2.Unscrewtheclutchbearing completewiththespringsleeve(Accessories-
Optionalequipment)(left-hand thread).
3.Takeoutthecompleteclutch.
4. For screwdriver version 346-1/2/738U(clutch 389748B/D): Insertthe
suppliedhandscrewdriver 326240 intothehalf-roundboreofthe lock
ring andturn handscrewdriver clockwise,until theadjustment nutcomes
off.
For screwdriver version 346-3/438U(clutch396030B): Slide the sup-
plied spanner805491 (AF 11) over thehexoftheclutchshaftandun-
screwthe adjustment nutbymeansof spanner800408(AF19).
5.Removelock ring.
6.Exchange clutchspring andreassembleclutchin reverseorder.
7.Insertclutchintotheclutchbearingandtightenclutchbearing complete
withspringsleevetotheDEPRAG-Screwdriver (left-hand thread).
Attention:
The clawof the clutchmust engage withtheclawofthespindle
(in clutchbearing).
The hexAF11 ofthe clutchshaft must engage withthehexof
the spindle (ingearing).
Picture: Exchangeofclutchspring- screwdrivertype346-1/2/738U(clutch389748 B/D)
clutchspring half-
round
bore adjustmentnut

13
Picture: Exchange of clutchspring – screwdrivertype346-3/438U (clutch396030 B)
8.An external torqueadjustmentoftheclutchis again possible (see section
Torque Adjustment).
Makesuretoscrewadjustment(adjusting)nut ontoclutchbearing
untilone line ofthe threadisvisible.
clutchspring
adjustmentnut
hexof the
clutchshaft

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4.2TorqueAdjustment
For an externaltorque adjustmentusethe following steps:
1.Disconnectscrewdriver fromairsupply
2. For screwdriver version 346-1/2/738U(clutch 389748B/D): Insertthe
suppliedhandscrewdriver 326240 through the sloton themotorhousing
intothehalf-roundbore ofthelockring.
For screwdriver version 346-3/438U(clutch396030B): Pushthesup-
plied adjustmentwrench337691through theslot onthe motor housing
intotheboreoftheadjustmentnut.
3.Byturning thehandscrewdriver resp.adjustmentwrenchclockwise(-),
the torqueisreduced, and ifturned counter-clockwise(+),thetorqueis
increased.
Picture:TorqueAdjustment
Screwdriverversion:
346-1/2/738U
Clutch:
389748 B/D:
half-round bore for
hand screwdriver 326240
Screwdriverversion:
346-3/438U
Clutch:
396030 B:
bore for
adjustmentwre
n
ch337691

15
5Handling
The operationof theDEPRAGMINIMAT-Screwdriverisverysimple. Gripthe
Screwdriverasillustratedon the picture“Connection of aDEPRAGMINIMAT-
Screwdriver”.
Assoonas you putthebit ontothe screwand slightlypushthescrewdriver
down, it will startrunning.Afterreachingthepresettorque,theautomatic
clutchwill disengageandturnoff the Screwdriver. The Screwdriver will be
readyfor thenext operationafterliftingitoffthescrew.
Althoughthe reactiontorque you will noticeisratherlowduetothe
ergonomicallyshaped handleandthe immediateeffect of the torque-out clutch,
wehighlyrecommend touseanadditionaltorquesupport, if torque ishigher
than 5Nm(suchasalinearstandorlateralhandleasperbrochureD3340 E).
The operatingdirection of reversibleScrewdrivermodelscanbe reversed by
actuating thereversebutton, inordertoloosen tightened screws. Toolwill also
start afterpushing itdown. Theclutchwillbe locked inthereversedirection. An
increased reactiontorque mayoccurinthe caseof screwsarehardtotighten
(suchasscrewswithdefectivethread).The reversebuttoncanbe lockedby
turning.
Picture: Reversal
· Alwaysdisconnect the Screwdriverfromairsupplypriortochangingbits, to
avoidthe unintentionalstart of the Screwdriver, whichmayresult ininjuries.
· The screwdriverisequippedwithaquick changechuck.
· Afterpullingthe sleeve,the bit maybe removed orinserted.
· Makesuretouseperfect bitswithDIN3126 –E6,3(1/4”)externalhexagon
end only.
ATTENTION:
Screwdriverwill immediatelystartrunning oncethebitis
pushed, and maycausesevereinjuries.

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6Assembly-Disassembly
Disassembly: (see SpareParts Drawing)
Prior todisassembly, disconnect equipmentfromair
supply! Onlyexperiencedmaintenance personnelmay
assembleor disassemblethisequipment.
Afterrepair or maintenance,verifythat equipmentrunstospecification!
Principally, useonlyDEPRAG originalspare parts. Otherwise, areduction
in equipmentpower-output and anincreasedmaintenance-requirement
occurs. If NON-DEPRAG parts areinstalled, DEPRAGis justifiedtovoid
anyexisting warrantyand liabilityobligations.
Attention:
Never clampmotorhousingintoavice,withouttheusage ofthe
protectivechuckingjaws, sincedamagetomotor-housing and
internalparts isunavoidable.
Attention:
Motor- and gearingparts maybe damaged if dropped!
For disassembly proceedinthesequencedescribed below:
1.Disconnectthemachinefromairsupply.
2.Unscrewclutchbearing (AF27,left-hand thread)completewithspring
sleeve(Accessories -Optionalequipment).
3.Takeoutthecompleteclutch.
4.Unscrewthequickreleasenipple804271 (AF 17) and removethe o-ring
802514 andthesilencer402378.
5.Clamptheexterior motor housing 3979471 withchuckingjaws 462506
intoavice.
6.Unscrewthreadedfitting402372 bymeansofpinwrench462581.
7.Pull outtheguide398706 andthe silencers 328233 and 313145.
8.Loosenthethreadedfitting 384731(AF12)bymeans ofkey462125 and
takeoffthe completereversal 388897E.
9.Slide thecompletemotor- and gearingpackage outoftheexterior motor
housing3979471 indirectionoftheclutch.
10.Removethe4balls802172resp.802201 from the valvehousing396575
and takeoffthe o-ring 829466.

17
11.Unscrewthreadedfitting396582 frommotor housing 396578 bymeans
of pinwrench462325.
12.Removebothwedges 326946frommotor housing 396578bymeans of
assemblypin 460744.
13.Slide thecompletemotor- and gearingpackage outofthemotor housing
396578 indirectionoftheairinlet.
a.Clamprotorcylinder intofixing device.
b.Pull off shaft-sidebearing cover fromrotor.
c.Removerotorcylinder.
NOTE
Exchange onlycompletesets of vanes.
d.Removevanes andcheckthemthoroughly. Vanesthataretoonarrow
or damagedhavetobe replaced in sets.
e.Pull offairconnecting-sidebearing cover fromrotor.
f.Pressthetwoballbearingsfrom thebearing covers.
Minimumvanes widthshouldbe8mm.
Assembly:
Use theDEPRAGGrease807293(100-gtube) togreasethe
ballbearing, needlebearing and gearing partspriorto
reassembly.
For assemblyproceed logicallyin reverseorderwithreferencetodisassem-
bly!
SpecialRepair Tools(OptionalEquipment)
NAME PART NO.
Arbor (todisassemble bearing cover withgrooveball bearing) 462330
Press-indevice(forbearingcover +rotor) 462203
Assemblypin (for wedge 326946) 460744
Arbor (toassemblecirclip 800248ontospindle) 461292
Chuckingjaws (forexterior motorhousing 3979471) 462506
Pin wrench(forthreaded fitting396582) 462325
Pin wrench(forthreaded fitting402372) 462581
Key(for threadedfitting384731) 462125
Assemblyarbor
(forassemblyofbearing needle 802332in clutchshaft331562)
460405
Fixing device(for rotorcylinder) 460475/1

18
6.1SparePartsDrawing

19

20