Rottler DA-4SB Assembly Instructions

1]IRECTIONS
FOR
OPERATING AND I'iAINTAINING
THI
ROTTLER
DA-4SB Bon r rue I'lncn r rur
6DA-4SB Bon I rue l'lncH r ur
6lDA- 68 Bonrxe MRci-tnre
i4ncH r ruE Srn I nr- No,
l'lnruuracruRED By
ROTTLER BORING BAR COI'IPANY
8029 SourH 200ru SrneEr
Krrur, 'rJnsH i NGToN 93031
iiOTE: I,IHeru ORDER I NG REPLAcEMENT PARTS/ PLEASE G I VE
MODEL AND SERIAL NUMBER,
(llrttIMUM 0RDER cHARGE oF $10,00)

i,/ARi'lING
THr MoDEL F-28, F-24ts, nr'rn DA SERIES BoRING MACHINES ARE
NOT STANDARD EAUIPPED WITH MOTOR OVERLOAD OF LOW
ELECTRICAL POWER PROTECTION.
TuIs PROTECTION IS NOT BUILT INTO THE MACHINE BECAUSE THE
ELECTRICAL CODE REAUIREMENTS VARY/ AND IT IS MORE ECONOMICAL
FOR THE PURCHASER TO BUY THESE DEVICES DIRECTLY FROM AN
ELECTRICAL EOUI PMENT SUPPLi ER.
0vrnlono pRoTECTION IS Mosr IMPoRTANT/ AND IT IS A
NEcESSiTy To pASS ELEcTRIcAL cODE REoUIREMENTS, llnfe
SURE YOU iNSTALL THIS EOUIPMENT WITH MOTOR OVERLOAD
PROTECTION IN ACCORDANCE WITH THE CURRENT REOUIREMENTS
NOTED ON THE MOTOR NAME PLATE,

- -L-
IHr Floorl DA-4SB enn IS A PoRTABLE PRECISIoN BoRING UNIT'
THts DA-4SB ilioogt- IS EouIPPED WITH A FLANGED AND A Rorrlrn
-B TYPE SOCKET SPINDLE NOSE TO ALLOW FOR A WIDE VARIETY
OF HEAVy DUTy DIESEL AND INDUSTRiAL WoRK, A Rorfmn -ts
TYPE SOCKET SPiNDLE NOSE OFFERS THE APPLICATION OF OTHER
_B TYPE CUTTER HEADS TO SUIT A VARIETY OF WORK AND USE
REAU I REMENTS ,
AI-I- FEEDS AND TRAVERSES ARE POWER OPERATED AND CONTROLLED
FROI4 THE UPPER GEAR HOUSING UNIT, AN AUXILIARY HAND TRAVEL
IS LOCATED AT THE BASE OF THE FEED SCREW, POI^IEN IS
FURNISHED BY END MOUNTED AC SINCLE PHASE IlO-220 VOLT
GErueRRl ElEcrnlc MoroR oF 3/4 to L-I/Z HP DEPENDING uPoN
SPINDLE SPEEDS REAUIRED, 3 PHASE MOTOR IS ALSO AVAILABLE.
A ouICK CHANGE LEVER SELECTS TWO SPINDLE SPEEDS, ON 6DA-4S8,
AND 3 SPEED BELT CASE INCREASES THE AVAiLABLE SPEEDS TO 6,
TuIS BAR IS ALSO EOUIPPED WITH A TWO SPEED FEED RATE I.JPPER
HOUS I NG .
GENN HOUSINGS ARE ALUMINUM ALLOY IN ORDER TO INCORPORATE
THE LIGHTEST POSSIBLE I4EIGHT WITHOUT SACRIFICING RIGIDITY.
NOTE: i,IHTN gNN IS SHIPPED FROM THE FACTORY/ THE MACHINED
SURFACES ARE PROTECTED WITH RUST VETO, AFTTR
UNCRATING/ USE CLEAI'.I CLOTH DAMPENED WITH KEROSENE
AND REMOVE THE PROTECTIVE OIL'
TO ORDTR fARIS
oRDER pARrs BY PART liUi'l3ER AND ALv{AYS GIVE STRIAL AND
i"iB[R or rHE cYLINDER B0RING llACHIi'lE
i'1ODEL N

-L-
Rorrlrn Bonlne Bnn CoptpRtlv iloorl DA pnnrs AND EoUiPMENT
ARE GUARANTEED AS TO }.IORKI4ANSHIP AND MATERIAL, THIS
LII4ITED GUARANTEI REI{Aii'lS ll'l EFFICT FOR Oi{E YEAR FROIv1
DATE OF DELIVERY, PROVIDED i\IACHINi IS O}'llt\lED AND OPIRATED
i]Y ORI G iiiAL PURCI{ASER.
SrRruoRnn ELECTRIC COI'1PoNENTS ARE WARRANTEED BY THEIR
RESPECT I VE I"IANUFACTURERS .
TooI-S PROVEN DEFECTIVE WITHIN THE TIME LIMiT WILL BE
REMEDIED AT THE FACTORY,S OPTION/ EITHER BY REPLACEMENT
OF PARTS AND/OR SERVICE BY THE FACTORY.
yIT ACCEPT NO RESPONS ItsI LITY FOR
DAMAGE/ WEAR ABUSE, OR MISUSE,
OBLIGATION T0 PROVIDE C0l4PEI'ISAT
INDIRECT COSTS IN CONNECTION WI
WARRANTY,
DEFECTS CAUSED BY EXTERNAL
I'lrtrHrn Do intE AccEPT ANY
ION FOR OTHER DiRECT OR
TH CASES COVERED BY THE
GuRNRNTTE DOES NOT COVER SHIPPING OR FREIGHT CHARGES,

C0il TR0L;q
l^h sUGGEST/ BEFoRE ATTEMPTING
OVER AN OPEN AREA AND ACTUATE
!.l I TH THE|UI '
TO BORE/ YOU CLAMP THE BAR
THE CONTROLS TO BECOI4E FAMILIAR
1, FEED LIVER
FTTO LEVER IS THE LATCHING LEVER ON SIDE OF THE BAR, PNTSS
DOI^IN UNTI L THE LEVER LATCHES TO ENGAGE CUTT I NG FEED, TO
DISENGAGE, PRESS FEED RELEASE ARM WHICH I^IILL UIILATCH LEVER
AND ALLOW IT TO RETURN TO NEUTRAL POS]TiON. LIFT FEED LEVER
UNTIL IT LATCHES TO ENGAGE RAPID RETURN TRAVEL, BAR tntlLL
AUTOMATICALLY RETURN TO NEUTRAL UPON REACHING TOP OF TRAVEL'
IT YOU WISH TO RETURN BAR TO NEUTRAL WHILE IT iS IN RAPID
UP TRAVEL/ AGAIN PRESS FEED RELEASE WHICH WILL UNLATCH LEVER
AND ALLOI^{ IT TO RETURI'{ TO NEUTRAL POSITiON'
YoU ITILL NOTE STOP ROD THAT IS HELD IN HAND FEED CAP BY SET
SCREW, HAS A ROUND SHAPED END i4HICH WILL RELEASE CUTTING trEED'
WHEN IT CONTACTS LEVER, TUTS IS MOST CONVENIENTLY RAISED UP
AND LOCKED BY THE SET SCREW IN PROPER POSiTION ON COi'4PLETION
OF FIRST BoRE CUT, TUIS RoD SHoULD NoT BE USED T0 FIoLD
CLOSE TOLERANCE SIIOULDERS,
THE FAST DOWN LEVER IS LOCATED TO THE RIGHT OF THE FEED LEVER.
CHECK FEED LTVER TO SEE TIIAT IT IS II'] NEUTRAL POSITI{]I] BEFORE
ACTUATING, LEVER SHI]ULD BE PULLTD DOI'IN NUICKLY AN]] FIRYILY
AND NOT ALLOI,.IED TO RATCHET. COI{TROL iS SPRING LOADED AND l^llLL
RELEASE WHEN YOU RELEASE PRESSURE, DO NOT USE I,IHEN YOU ARE
ustNG THE 7-13 0R 38C RP[l sPINDLE SPEEDS, sHIFT T0 A Lol^lER
SPEED,

-u-
THT SPINDLE CLUTCH CONTROL IS LOCATED TO THE LEFT OF THE
FEED LEVER, A PULL RELEASE RAPID DOWN MOVEMENT WILL
ENGAGE SPINDLE ROTATION AND A REVERSE ACTION l^/ILL
DISENGAGE, Iru THAT THIS IS A JAW CLUTCH WE RECOMMEND
STOPPING THE MOTOR OR JOGGING THE MOTOR TO ENGAGE CLUTCH
WHEN you ARE ustNc sPINDLE sPEEDS oF 200 nr'ro 3t0 RPI{,
SrRruonno pRocEDURE IS TO THRow our cLUTcH uPoN CoMPLETI0N
OF THE BORE, TUNN CUTTER HEAD AROUND TO INDEXING DETENT
WHICH WILL POSITiON TOOL TO FRONT THEN REVERSE TRAVEL'
Tnr LowER st4ALL KNoB oN ToP oF THE
USED FOR MANUALLY TURNING SPINDLE
UPPER KNOB IS USED FOR CENTERING'
UPPER HOUSING MAY BE
WHEN NECESSARY. THT
A 2.3/L6,, MANUAL TRAVEL IS ACTUATED BY ROTATING HANDLE
ATTACHED TO SPLiNE AT TOP OF BASE, TI.IIS TRAVEL SIIOULD
AL!\IAYS BE LIFT Ii{ FULL UP POSITIOI.I AFTER USING BAR.
i{onmnl pRoCEDURE IS T0 RAPID TRAVEL 0R FEED BAR T0 PoINT
REOUIRING MANUAL TRAVEL. IF BACK FEEDING iS NECESSARY
RUN HAND TRAVEL DOWN FIRST AND THEN RAPID TRAVEL DO}^IN TO
I^IHERE TOOL CAN BE iNSERTED.
5, SPEED CO|{TROL
THE SPEED CONTROL i S OPERATED BY THE PULL RELEASE KNOB AT
THE MOTOR GEAR HOUSINGI UP FOR LOW SPEED/ DOWN FOR HIGH'
THIS CONTROL MAY BE CHANGED WHEN BAR IS RUNNING ALTHOUGH
IT iS DESIRABLE TO STOP MOTOR OR JOG I"IOTOR WHEN CHANGING
FROM A sptNDLE sPEED oF 50 ro 200 AND FRoM 100 ro 380 RPI{'

THr TWo FEEDS pRoVIDED 0N YoUR DA-4SB anr cONTRoLLED BY A
SLIDING KEY ARRANGEI'1ENTI OPERATED BY A SMALL KNOB ON THE
TOP OF THE UPPER HOUSING, THIS KNOB IS RAISED TO ENGAGE A
LO}4 SPEED FEED RATE AND LOI'{ERED TO SECURE A HIGHER FEED
RATE. TO OPERATE THIS KNOB/ LIFT THE FEED SHIFT LEVER TO
NEUTRAL AND OPERATE THE KNOB AS REAUIRED/ ALLOI^IING THE
SHIFT LEVER TO RETURN TO FEED POSITION. IT WILL TAKE A
MOMENT FOR THE SLIDING KEY TO DROP INTO DRIVE POSiTION,
THIs CONTROL MAY BE OPERATED WHILE THE MACHINE IS ACTUALLY
IN A BORING OPERATIONJ ALTHOUGH THE DWELL OF THE TOOL I'IAY
LEAVE A !.IITNESS P1ARK IN THE BORE.
7, CEi{TTRI i'IG Ki{OB
Tne cENTERING KNoB (uppgn KNoB) nr rHr TOP OF THE UPPER
SPINDLE HOUSING EXPANDS THE CENTERING FINGERS WHEN TURNED
cLocKWI SE, BE cAREFUL NoT T0 oVER-EXTEND THESE FI I'JGERS
WHEN SPINDLE IS NOT IN THE CYLINDER OR THEY WILL COME
COMPLETELY OUT OF THE PINION DRIVE.
i]OS 1T IIii .
A rHnrE SpEED BELT cASE I S LoCATED ToYJARD THE BACK 0F
THE BORING BAR, TO CHANGE SPEED IN THE BELT CASE/ FIRST
DI SCONNECT POWER FR0t\1 B0R I NG BAR/ L00SEN KNOB 0N S IDE
CoVER., ptvoT CoVERS T0 GAIN ACCESS T0 THE V-erlf, NOW
LOOSEN THE clAt'lp HANDLE AND PIVOT MOTOR FoRWARD, i'ioW
you CAN I,IOVE THE BELT T0 NEW GROOVE LOCATION, Upprn
GROOVE POSIT]ON IS FOR LOW SPINDLE SPEED AND LOWER FOR
HIGH SPINDLE SPEED, ATTTN SELECTING THE SPEED YOU
RESUIRE, PIVOT MOTOR BACK AND TiGHTEN BELT.
OVIR-TI GHTEI'I BELT, )

-D-
6DA-r'S3 0llLY
SPINDLE SPEIIS
V-BELT POS IT ION IOtrGEXB-5PEED H I GH GEAR SPTTD
uPPER 2l 8C
M r DIILE 50 ?01
LOWER 100 333

-l
l'lr REC0MMEt'lD, pARTICULARLY F0R 0PERAToRS UNFAMILiAR t^tlrH
THE BORING BARI TO PRACTICE ON A JUNK BLOCK IN ORDER TO
BECOME ACOUAINTED lllITH ALL CONTROLS AND DETAILS CONNECTED
I^{ITH THE USE OF THE MACHINE'
CRnrruuy cLEAN AND FILE oFF HIcH sPoTS/ THREADED BURRS/
ETC,,, ON TOP OF CYLINDER BLOCKS'
l'lensune EACH CYLINDER, DETERMINE THE AMOUNT oF I4ETAL T0
BE REI"IOVED FROM THE I'IEASUREI"IENT OF CYLINDER WHiCH SHOWS
THE MOST WEAR.
Ir I s LI KELy you t^lt LL ENCoUNTER s0l4E coMPLI cATED cLAMP I NG
PROBLEI4S IN BORING OCCASIONAL INDUSTRIAL AND HEAVY WET
SLEEVE ENGINES AND coMPRESSoRS, CtRt'tplrue cAN oFTEN BE
MOST EFFECTIVELY HANDLED BY BOLTING A SUB PLATE TO THE
BLOCK SURFACE AND BOLTING THE BORING MACHINE TO THE SUB
PLATE.
THT OUTER LIP OF THE BASE OF THE BORING BAR CAN BE USED
FOR CLAMPING/ BUT BE SURE THAT YOU HAVE ENOUGH CLAMP TO
HOLD THE BASE SECURELY AND THAT THE BASE OF THE BORING
BAR HAS GOOD CONTACT WITH THE CYLINDER BLOCKS.
BORI i'.lc
Ir rool IS pRopERLY SHARPENED, PLAcE TooL BiT AND PRoPER
TOoL HOLDER IN MIcRoMETER, (CHoosr A TooL HoLDER THAT wlLL
ALLOI{ MINIMUM TOOL BIT OVERHANG FOR THE SIZE YOU i/{ISH TO
BORE, ) (l{r RECoMI4END A MAXii'4ul'1 ToOL BIT oVERHANG oF 5/3"
BEYOND THE TOOL HOLDER,) HOI-I TOOL BIT LIGHTLY AGAINST
THE MICROMETER ANVIL AND LOOSEN ALLEN SCRE}^I I^IITH ROUND

-8-
BORING. CONT.
HEAD ALLEN WRENCH, GEIITTY LET TOOL HOLDER SLIDE BACK
TO MAKE CONTACT I,IITH MICROMETER SPINDLE. TUIS PROCEDURE
I.JILL PREVENT CHIPPING CARBIDE AND PiTTING OF MICROMETER
ANVIL, THls MICRoMETER iS ,050 fO A REVoLUTION RATHER
THAN ,C25 ns 0N A coNVENTI0I'1AL MICROMETER, Srr MICRoI'1ETER
TO SIZE THAT YOU WISH TO BORE AND TIGHTEN SET SCREW
LIGHTLY. BACK OFF MIKE AND TIGHTEN SET SCREW, HTNE AGAIN
EXCESSIVE TIGHTENING ONLY TEFDS TO NICK I'1IKE ANVIL AND
MAKE FUTURE SETTING DIFFICULT. ATTER TIGHTENING/ RECHECK
S I7E, (l'l0T[: SrE MI cRoMETER PAGE FOR RE-SETT I NG MI KE T0
HIGH OR LOW RANGE,)
I'inre SURE TOoL HoLDER AND ToOL HoLDER SLoT I N HEAD ARE
FREE FR0l'1 DIRT, IlrsERr rool IN slor/ MAKING suRE IT IS
cOI4PLETELY BACK AND LATCHES, LIGHTLY LOCK SET SCREW/ WITH
SOCKET TYPE SCREW DRIVER PROVIDED WiTH TOOLS'
EruONOE SPINDLE CLUTCH AND LATCH FEED LEVER IN DOWN POSITION,
i,{Hrru BAR HAS coFIPLETED BORING, SET SToP RoD So LEVER WILL
BE THROWN INTO NEUTRAL POSITION. STOP ROD WILL THEN BE
SET FOR THE OTHER HOLES ON THE SAI4E CYLINDER BLOCK,

-9-
COUliTERBORI IIG
COUiITTRBORING MAY BE BEST ACCOMPLISHED BY THE USE OF AN
OPTIONAL I,,TRAVEL DIAL INDICATOR ASSEMBLY/ #5A3-I48,
503-r4E
rr*DrCanOR
AS5Y,
OUTER SPIN DLE
503- l a- r
LOCI( NUT - OUTtrR
SPINDLE
SPINDLE BASE.
503- lE-z
D)AL iNDTCAToR ANVIL \- NOTE""
-_ L)LL) 5I-YLE. WITrIOTJT
LOCK xrUT 5o3-l$-l
t,SE J t6 I:OOT 5O3_ t1_ +C
To cOUNTERBORE TO A CLOSE TOLERANCE DEPTH, CAREFULLY HAND
FEED THE RF TYPE CUTTER BiT DOI{N UNTIL THE CUTTER IS SLIGHTLY
ToUcHiNG THE BLocK SURFAcE, Aolust THE DIAL READING T0 0
AND HAND FEED CUT DOWN T0 l^llTHIN ,0J3 TO ,087 or DESIRED
DEPTH, CHECK THE EXACT DEPTH OF COUNTERBORE AT THIS POINT
WITH YOUR DEPTH MICROMETER AND HAND FEED THE REMAINING DEPTH
REOUIRED BY READING THE PROPER NUMBER OF GRADUATIONS ON THE
I ND I CATOR .
N
I
I

-Iil-
PNECISION FiNISH BORES MAY BE CUT IN ONE PASS WITH STOCK
REMoVAL UP T0 ,050 IN DIAI4ETER/ PRoViDED THE SUGGESTED
SURFACE SPEEDS OF fiA FEET PER I"lINUTE ARE USED, GENERALLY
WHERE THE FINEST FiNISHES ARE REAUIRED AND/OR A HEAVY STOCK
REMOVAL MAY tsE MADE/ USE THE LIGHT FEED RATE, EXTNTMT BORE
LENGTH JOBS MAY REOUIRE ,O4O FINISH CUT,
ROUEHING CUTS FOR SLEEVING OR SUBSTANTIAL STOCK REMOVAL CAN
BE MADE UP TO .2OC Oru THE DIAMETER/ USING THE FAST FEED RATE
AND APPROXiI4ATELY 2OO FEET PER MI NUTE SURFACE SPEED '
lirnvv curs uP To
STUB BORING BAR. ,15C oN THE DIAMETER cAN BE I4ADE wirH THE
TUE PERFORMANCE OF YOUR BORING BAR AND AUALITY OF WORK IT
WILL DO/ IS ALMOST ENTIRELY DEPENDENT ON THE CARE OF THE
cUTTING TOOL, IT IS THE MOST FREOUENT CAUSE OF SIZE AND
FiNISH PROBLEMS IN BORING.
TO SHARPEN THE CARBIDE BiTI INSERT TOOL HOLDER IN SHARPENING
JIG SLOT, PLNCE THE JIG OVER TIIE PIN PROVIDED ON THE TOP OF
THE MOTOR HOUSING AI'JD SHARPEN BiTS ON THE SMALL DIAMOND
WHSEL PROVIDED ON THE MOTOR SHAFT, ATWRYS MAKE SURE YOU
SHARPEN THE TOOL ON THE SIDE OF THE DIAMOND WHEEL THAT IS
RUNNING TOWARD THE ToP FAcE 0F THE BIT, SHRnperutrue THE
\,,tRoNG SIDE CAN READILY cHIP THE P0lNT, !{HEtl SHARPENINGT
USE VERY LIGHT PRESSURE/ IV1OVING THE TOOL BACK AND FORTH
ACROSS THE DIAMOND WHEEL/ TO IMPROVE CUTTING AND PREVENT
GROOVING OF DIAMOND YJHEEL, ATTTR SHARPENiNG A NUMBER OF
TIMESJ DRESS EXCESS STEEL AV'IAY FROM CARBIDE WITH A GRINDING
F{HEEL,
CAUTI Oi'I :

-tJ-
TOOL BIT SHARPENING, CONT,
Dlnmorun I,JHEEL IS DESIcNED FoR cARBIDE oNLy AI'JD IS NOT
INTENDED FOR RAPID STOCK REMOVAL. STEEL TENDS TO LOAD
IT, A roor- elr usED FoR ALUMINUM BoRING sHouLD NEVER
ALTERNATELY BE USED FOR CAST IRON OR STEEL, IRoN WELD
ON TOP OF THE BIT I/{ILL CAUSE A ROUGH FII'IISH ON ALUMINUI4
WORK,
DO NOT ATTEMPT TO DRESS OR SHARPEN THE TOP OF
THE ToOL BIT, GnIiw OR DRESS FRONT AND SIDES
ONLY,

IT THE DIAIqOND DISK
MANY YEARS OF SERVI
-72-
IS HANDLED WITH CARE IT WILL PROVIDE
cE,
A I ABRASIVE STONE IS FURNISHED WITH YOUR DIAMOND }^iHEEL FOR
USE IN HONII.{G THE FACE OF THE VJHEEL, YOU SHOULD USE THIS
STONE FREOUENTLY TO REMOVE THE PARTICLES THAT TEND TO
LOAD THIS WHEEL/ OTHERWISE YOU WILL NOT PRODUCE THE KEEN
EDGE ON THE TOOL THAT ALLOWS THE MACHINE TO BORE ACCURATE
HOLES WITH A FINE SURFACE FINiSH,
!,JIfU T00LS SHARPENED T0 A PRECISI0N EDGE/ IT SHoULD BE
poSSIBLE T0 BoRE APPRoXiMATELY 20 aveRsIZE cYLINDERST
PROVIDED THE CORRECT SPiNDLE SPEED IS USED. THIS APPLIES
TO MOST AMTNiCAN PASSENGER CAR BORES UNDER 4-I/?,,,
PROVIDED NO HARD SPOTS OR FOREIGN MATERiALS ARE IN THE
cYLINDERS. THE SAME NUMBER OF SLEEVING CUTS CAN BE MADE
ON LOW SPEED WITH OUT FURTHER SHARPENING/ PROVIDED THE
TOOL HAS AN ORIGINAL KEEN EDGE'
c F i'l T t R I ;,t G Fl_i!_g_E_n_s
Crrurrn i ile F
CENTER THE
WORN HOLE.
TO OBTAIN N
INGERS SHOULD BE KEPT
NEW BORE WiTHIN ,0I2"
CEr.trERtrue FINGERS cA
EAR PERFECT CENTERING
ADEAUATELY ACCURATE TO
OF THE CENTER OF THE
N BE LAPPED PERIODICALLY
CrNrrnlrue FiNGERS cAN BE TAKEN ouT BY SIMPLY RoTATING THE
CENTER I NG KNOB CLOC KW i SE UNT I L F i I'JG ERS CAN BE REMOVED '
;'JHeiI THEY ARE REPLACED OR RESET IN THE CUTTER HEAD/ THEY
SHOULD BE REPLACED IN THE RESPECTiVE NUMBERED SLOTS AND
THE CENTERiNG KNOB FiRST ROTATED CLOCKWISE AND THEN
COUNTERCLOCKWISE TO INSURE THAT FINGERS ENTER PiNION
TEETH S IIqULTANEOUSLY.

- l)-
CENTERING FINGERS/ CONT,
PEnIODIcALLY cHECK THE CENTERING FINGERS BY BORING A
HOLE AND THEN l^lITHOUT UNCLAMPING THE SPINDLE UNIT/ EXTEND
THE FINGERS AGAINST THE WALL/ CHECKING TO SEE THAT EACH
FINGER TIP WILL LOCK A ,001" SHIM, IF THE FINGERS WILL
NOT DO THIS THEY SHOULD BE LAPPED BY ROTATING THEM BACK
AND FORTH IN THIS TEST BORE WHILE HOLDING THE FINGERS
AGAINST THE WALL, IF THIS DOES NOT OUICKLY BRING CONTACT
AND PRESSURE TO ALL THE FINGERS/ IT WILL BE NECESSARY TO
DRESS CAREFULLY THE HIGHER FINGER OR FINGERS WITH A FILE
AND REPEAT THE LAPPING PROCESS.

iCROi{ETER
YouN TOOL SETTING MICROMETERJ AS WITH ANY OTHER MEASURING
TOOL/ SHOULD BE USED DELICATELY AND y\liTH CARE TO BE ASSURED
OF THE GREATEST ACCURACY, PRRTICULAR ATTENTION SHOULD BE
PAID TO INSERTING THE TOOL IN THE MICROMETER WITHOUT
ALLOWING BIT TO SNAP iNTO MIKE ANVIL, CNNE SHOULD BE USED
IN THE METHOD OF LIGHTLY LOCKING THE TOOL BIT BEFORE
TiGHTENING.
Arrrn n pERIoD OF USE YoU WILL NoTE THAT THE T00L BIT TIP
WiLL FORCE A DEPRESSION IN THE MICROI4ETER ANVIL, THIS,
OF COURSE/ WILL RESULT IN INCONSISTENT SIZES/ PARTICULARLY
AFTER RESHARPENING THE BIT. PTNIODICALLY tlE WOULD RECOMMEND
TURNING THE ANVIL SLIGHTLY AND FINALLY END FOR END SO THAT
A FLAT SURFACE iS EXPOSED TO THE TOOL BIT TIP.
SFTTING IIICROIIiTEi
(3-7/8" currER HEno)
TO SET DA-4SB IIICROI'IETER TO HIGH OR LOW READING/
USING A MICROMETER WITH A 2,9,, TO 6,, READING,
TuE sTANDARD FOR YOUR DA-ttSB nnn I s sET, Do
NOT CHAI{GE ITI EXCEPT WHEN IT IS NECESSARY TO
RECALIBRATE THE MICROMETER,, THEN THE STANDARD
SHOULD BE RESET TO MATCH THE MICROMETER'
M
tt
CA ION:
To BORE FRoM 3-5/16" T0 6",, PLAcE sTANDARD MIcRol'iETER
AND ADJUST MIKE ANVIL S0 THAT MiKE READS 6,0" (i\0TE: RrRo
DiRECTLY AS SHOWN ON MICROMETER SLEEVE,) TO BORE FROM
6,C" TO 9,0", PLACE STANDARD IN MIKE AND ADJUST MIKE
ANVIL SO THAT MIKE READS 3,0". THE I4IKE READING IS ?,9"
T0 6,C" AND wtLL Not^l ACTUALLY GUAGE TooL FRoM 5,9" T0 9",
TJHTiI MIKE iS SET FOR LARGER BORES/ REMEMBER THAT BAR }'tILL
BORE 3" LARGER THAN Mi KE READS,

1, BonE A HoLE
Rrmove r00L HoLDER AND BIT AND pLAcE iN rlrcRoMETER,
An;usl MIKE SO THAT IT READS THE SAME SIZE AS THE HOLE
YOU HAVE BORED. SmALL VARIATIONS MAY BE MADE BY
TURNING THE MIKE SLEEVE WITH SPANNER WRENCH PROVIDED.
LnneTn cHANGES SHOULD BE MADE BY MOVING THE ANVIL,
2,
3,

YKULb,L}UKI
FOR
C ENTER I NG
USING CENTERING TELESCOPE
The cutter head and centering rod nust be removed before you
can use the centering telescoPe.
You can lcemove the cutter head by removing itts four attach-
ing screws on the bottom of the cutter head.
The centering rod assernbly can be removed by loosening
socket Ser s crew 1n knob .
To attach the scope to the top of the inner spindle, first
loosen the lock clamp then place the scope mount over the
inner spindle making sure the key engages the key slot in the
inner spindle. Then tighten the
To attach the scope to the cutter head end of the inner
spindle, you rnust first attach the scope adapter, then attach
the scope mount to the adaPter.
Place a centering target in the hole you ate trying to center
to, then mount the boring bar over the other ho1e. Sight
through the scope, focus the target with the object knob, then
focus the cross hair with its focusing ring. Adjust the
boring bar ti11 the center of the cross hairs are on the
centei of the target, turn the inner spindle 180". If the
center is off, adjust the boring bar to half the distance it
is off. Keep adjusting the boring bar, ti11 you can rotate
the cross halr about the center of the centering target and
have an equal radial distance on all sides of the targetrs
center or on the targetrs center.
Holes will be parallel if the nounting surface of the
holes you mount the boring bar to, are paraltel and are square
to the bore . If these are not para11e1 and square
you will have to place the centerrng target 1n one end of the
hole you are centering.to, then in the other end of the same
hole and center the bar to both.

PROCEDURE FOR LI NE OF S i GHT AI]JUSTMENT
FOR CENTERING TELESCOPE
To nake line of sight
nount scoPe on boring
hori zontal position.
Now place a centering
the inner spindle and
of s cope paral 1el to inner sPindle,
bar, then place boring bar in a
target in line with the center of
at six feet or more distance from it
Sight through the scoPe and align the boring bar to the
center of the target.
Now rotate inner spindle, if the cross hair does not rotate
on an equal radial distance from the center of the target,
move bar I/2 the distance that the bar is off.
Keep adjusting the bar until the center of the cross hair
revolves around the center of the target at an equal distance
frorn the talget center. Now, the bar should be centered
to the target.
To rnake scope line of sight para11e1 to the center of inner
spindle, loosen locking screw on scope's mounting caP. Then,
rlt"tnately loosen and tighten adjusting sclfew on side of cap
until you can no longer reduce the radial distance to the
center of the target when you rotate the inner spindle,
retighten the 1 ocking s crew.
Now run spindle all the way down, rotate i.nner spindle and
check if the center of the cross hair will revolve around the
center of the target at an equal radial distance frorn the
center of the target. If not, repeat above procedure.

LOCKING SCREW_'\
trocuS -
(ozurcr)
SCOPE
CENTERING TELESCCPE
F CCUS -
(cposs rntB) ,,-5lt-31 -l
.'- scopE
5r t- 3l-5
CAP
ADJUSTING
5CPEW
5r t-31-6
ADJUSTING PLATE
5r l-31-2
SCCF)E MOUNT
5t r-31- I
KEY
MOUNT--=-\
5t t-3t-7
CLAMP
5l t-31-3
INNER SPINDLE
,-51 l-31-4
i ADAPTER