I ns t r u c t I o n M a n u a

l

Va lV e s e at c u t t er

NEWAY MANUFACTURING, INC. P.O. Box 188 • Corunna, Michigan 48817 USA Phone: (989) 743-3458 • Fax: (989) 743-5764 Email: info@newaymfg.com Web: www.newaymfg.com

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l�

Before using the tools,

please read this entire manual carefully.

NARROWINGCUTTER

EXPANDABLEPILOT

SOLIDPILOT

SEATCUTTER

PILOTPULLER PIN

T-HANDLEWRENCH

BRUSH FORCLEANINGBLADESERRATIONS

5/64" HEX KEY(Blade Lock)

3/32" HEX KEY(Hub Lock)

HEADSTANDS

POWERUNIT

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l �

contents

Why Proper Valve seating is Important.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Objectivesofvalveseatreconditioning InterferenceAngle

Preparation for cutting Valve seats.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

selection and use of Proper Pilot.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 SolidPilots ExpandablePilots

selection and use of Proper Valve seat cutters.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8 AdjustmentofCarbideBlades GeneralInstructions DetailedInstructions BottomNarrowingCut TopNarrowingCut FinalSeatCut InspectingtheSeat

changing the location and/or Width of the seat.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

checking Valve seat concentricity and closure.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 ToleranceforRunout(Concentricity)

special application carbide Blades.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 RadiusBlades SteppedBlades

Power unit.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Basic Parts list.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–12

Helpful suggestions.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13–14

troubleshooting.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l�

Why Proper Valve seating is Important

Goodvalveseatsarecriticaltomaintainingcompressionandhorsepower.Poorlyseatedvalveswillnotonlycausecompressionloss,butwillalsocompromisetheabilityoftheexhaustvalvetocoolitselfbytransferringheatthroughcontactwiththevalveseat.Further,ifvalveseatconcentricityisoutsideoftheallowablelimit,mechanicalstressesmaycausevalvefailure.Agoodvalveseat:

• Isconcentrictothecenterlineofthevalveguide(withinOEMspecs).

• Isproperlylocatedonthevalveface.

• Istheproperwidth.

• Hasasurfacetexturewhichisconducivetoefficientsealingandheattransfer.

• Hastheproperangles(contactsurfaceandreliefanglesaboveandbelowcontactsurface,alsoreferredtoasnarrowingangles).

UnlessotherwisespecifiedbytheOEM,Newayrecommendstheuseofaninterferenceangle(e.g.45°valve,46°seat).Thiswillcausemaximumpressurebetweenthevalveandseattooccurattheoutermostdiameter.

Preparation for cutting Valve seats

• Cleanthecylinderheadthoroughly,includingtheseatsandvalveguides.

• Checktheconditionofthevalveguides(refertoOEMspecsandinspectionprocedures).

• Badlywornvalveguidesmustbereplacedorreconditionedpriortovalveseatreconditioning.

EXHAUST

COMBUSTION

CHAMBER

PISTON

CUTTER

TOPNARROWING

BOTTOMNARROWING

SEAT

VALVESEAT

INTERFERENCEANGLE

VALVEFACE

BADLY WORNGUIDE AREA

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selection and use of Proper Pilot

solID PIlots

• Selectapilotthesamediameterasthevalveguideinteriordiameter(ID).

• Insertthepilotintothevalveguide,twistingslightly,untilsnug.Pilotshouldershouldnottouchthevalveguide.

eXPanDaBle PIlots

•SelectapilotthesamediameterasthevalveguideID.

• Insertthepilotintovalveguidemakingsurethattheexpandingsectionofthepilot(collet)iscompletelywithinthevalveguide.The pilot will not center properly if the collet extends outside of the valve guide even slightly. The collet may also be damaged if expanded while extended outside of the guide.

• Pilotshouldershouldbeabout1/8"(3mm)abovethevalveguide.

• Usingthepilotpullerpin,turnthepilotasthenutisheldfastattheopposingend.Thiswillexpandthecolletandsecurethepilotintoposition.

• Colletsare.003"smallerthanstateddiameterandcanexpandupto.020"(0,5mm).

• Theconcentricityofthevalveseatreliesonatightfittingpilotinaround,straight,guide.

SHOULDERSHOULDNOTTOUCH

VALVEGUIDE

PILOT

PILOT PULLER PIN

SHOULDER

EXPANDABLE PILOT

HOLE FORPILOTPULLERPIN

NUT

COLLET

1/8" (3 mm)

EXPAND PILOTBY TURNINGPILOT

PULLERPIN

NUT

COLLET

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l�

selection and use of Proper Valve seat cutters

aDJustMent of carBIDe BlaDes

• Beforeusingcutters,checkbladeadjustment.Itisnotnecessarythatallthebladesbesettothesameposition.Simplycheckthatthebladesdonotcutorgougethecombustionchamberwallandthateachbladeextendsentirelyoverthesurfacetobemachined.Donotovertightenscrews.

• Whenadjustingbladesinwardoroutwardbesurethattheblademaintainsfullcontactwiththeflatofthewedge.

• Whenchangingblades,besurethatthepointedendofthebladepointstowardthecenter,orhub,ofcutter.

General InstructIons

• Selectacutterapproximatelythesamesizeasthevalveheaddiameterandwiththecorrectangle.

• Placethecutteroverthepilotandcarefullylowerthecutterontotheseat.DONOTDROPTHECUTTER.

• PlaceT-handle,easy-turnwrench,orhexsocketofpowerunitoverthepilotandontothehexofthecutter.

• Turnclockwise,applyinglightdownwardpressure.UsetwohandsontheT-wrench.Releasethedownwardpressureattheendofeachcut.Makeoneortwoturnswithnopressure.

• Besuretomaintaindownwardpressureoverthecenterlineofthepilot.Payspecialattentiontomaintainingcenterlinepressureinsituationswherethecutteriscuttingononlyonesideoftheseat(e.g.afterinstallationofanewvalveguide).Excessivedownwardpressuremaycausethepilottoflexoffcenter.Letthecutterfollowthepilot.

HEADDIAMETER

MOST BLADES ARE ADJUSTABLE

HEX KEY

BLADE POINTED END

FLAT HEADSCREW

ALWAYS TURNCLOCKWISE

APPLYVERYLIGHTPRESSURE

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DetaIleD cuttInG InstructIons

• Inspecttheseat.Thesizeofthepits,burnsouts,andblowbyeswilldeterminetheamountofmaterialthatmustberemoved.

Bottom Narrowing Cut

• Begintheprocessbycuttingthebottomnarrowingangle(usually60°or75°)usinglightpressure.Cutuntilsomeamountofsurfacehasbeencutallthewayaround,formingacontinuouslinewiththevalveseat.Thisoperationraisesthebottomedgeofthevalveseat.

• Note:Somenarrowingcuttershavemoveablehubsandwillrequireadjustment.Thesehubsareheldinpositionbyasetscrew.Donotovertightenthissetscrew.

Top Narrowing Cut

• Repeatasaboveusingthetopnarrowingangle(usually30°or15°).Again,cutuntilsomeamountofsurfacehasbeencutallthewayaround.Thisoperationlowersthetopedgeoftheseat.

Final Seat Cut

• Beforemakingthefinalcut,makesurethatthewidthoftheseat(i.e.theuncutsurfacebetweenthetopandbottomnarrowingangles),isslightlylessthandesiredfinishedwidth.Also,thisuncutsurfaceshouldappearuniforminwidthbeforemakingthefinalcut.Ifthewidthoftheuncutsurfacevariessignificantlyfromonesidetotheother,continuecuttingboththetopandbottomnarrowinganglesuntilthewidthisuniform.

selection and use of Proper Valve seat cutters (continued)

BOTTOMNARROWING

SEAT

BOTTOMNARROWINGCUTTER

TOPNARROWING

TOPNARROWINGCUTTER

SEAT

BOTTOMNARROWING

SEAT

TOPNARROWING

SEAT CUTTER

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l�

DetaIleD cuttInG InstructIons (continued)

• Cuttheseattotheproperwidth.Letthecuttermakeafewturnswithnopressure.

• Thefinishedvalveseatwillhaveamachinetexturedfinish(nothighlypolishedorshiny).Thisprovidesasoftsurfaceforfinalmatingwiththevalvefaceinthefirstsecondsofengineoperation.Itisnotnecessarytolapthevalve.

Inspecting the Seat

• Removethepilot,usingthepilotpullerpin.

• Insertthevalveintothevalveguide.

• Usingyourfingers,tapthevalvefirmlyagainstthevalveseat,upanddowninthevalveguide,holdingthevalveaboveandbelowthecylinderhead.Dothisuntilaringmarkappearsonthefaceofthevalve.

• Thevalveseatshouldbelocatedinthemiddleofthefaceofthevalve,orjustslightlyoff-centertowardthemargin.Whenthevalveseatisproperlylocatedonthevalveface(inthemiddle),theringmarkshouldappearabout1/4to1/3ofthewaydownthevalvefacefromthemargin.Thisringmarkiscreatedbytheridgeattheouterdiameterofthe46°surface,wherethe46°and31°anglesmeet.Whena1°interferenceangleexistsbetweenthevalvefaceandthevalveseat,the46°seatdoesnotmakefullcontactwithvalve.Whentheenginefirstfiresthesesurfaceswillmatetogetherandfullcontactwilloccur.Whencuttinganon-interferenceseat—45°valveto45°seat—thefullwidthofthevalveseatwillcontactthevalveaftercutting.InthiscaseitmaybeusefultousePrussianblue,orasimilarmachinist’slayoutfluid,tovisuallycheckthelocationoftheseatonthefaceofthevalve.

selection and use of Proper Valve seat cutters (continued)

LIFT WITH PILOT PULLER PIN

PILOT

VALVEGUIDE

RING-MARK

TAP UP AND DOWNONTO SEAT BY HAND

VALVE FACEVALVESEAT

MARGIN

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changing the location and/or Width of the seat

Iftheringmarkistoohighonthevalveface(i.e.tooclosetothemargin),thencutmorewiththetopnarrowingangle.Thiswilllowertheringmarkonthefaceofthevalve.However,itwillalsoreducethewidthoftheseat.Itmaybenecessarytocutthe46°surfaceagaintorestoredesiredseatwidth.Similarlyiftheringmarkistoolowonthevalveface,properseatlocationcanberestoredbyeithercuttingabitmorewiththe46°cutteror,ifseatingsurfacebecomestoowide,bycuttingwithboththebottomnarrowingangle(usually60°)andthe46°angletoobtainproperseatwidthandlocation.

checking Valve seat concentricity and closure

Valveclosurereliesonboththeconcentricityofthevalveitselfandtheconcentricitybetweenthevalveguideandthevalveseatingsurface.Measuringtheamountofconcentricity,orrunout,foreachoftheseandaddingthemtogetherprovidesuswiththetotalamountofrunout.Itisthistotalrunoutwhichwilldeterminehowperfectly,orimperfectly,thevalveseats.Therewillalmostalwaysbesomeamountofrunout,itisthereforeimportanttounderstandtheallowablelimit,ortoleranceforrunout.Thereisasimpleruleofthumb:foreveryinchofvalveheaddiametertheOEMwillallowfor0.0015"oftotalrunout.Higherrevvingengineswilldemandtightertolerances.

ValveclosurecanbecheckedbypaintingthefaceofthevalvewithPrussianBlue.Besurethatthevalveyouuseistrue.Insertthevalveintotheguideandapplylightpressure,turningthevalvebackandforth1/8"orso.Acontactpatternwillappearonthevalveface.Oneormoreopenspotsmayappear.Veryshortintermittentopenspots(shorterthanthedistancefrom12to1onaclock)donotindicateaproblemandwillpeenoutimmediatelywhentheenginefires.Largeropenspots(from12o’clockto2o’clockor3o’clock)canberemediedbyreturningthecuttertotheseatandlightlyturningthecutterafewrevolutionswiththefingers.Iftheopenspotislargerthan90°(12o’clockto3o’clock)repeatthethreecuttingsteps,makingverylightcuts,orcontactNewayManufacturingfortechnicalassistanceat(800)248-3889.

DIAL INDICATOR

CHECKS CONCENTRICITY ALL AROUND SEAT

PUT "BLUE" ON VALVE FACE

"BLUE" RUBS OFF AS CLEAN LINE ON THE VALVE FACE

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l1 0

special application carbide Blades

• Newayradiusbladesareusedtosmoothlyblendtheouterdiameterofthetopnarrowingangle(usually30°or15°)intothecombustionchamberwall.Stepsorridgesmayexistattheouterdiameterofseatsduetoarecessedseatorahemisphericallyshapedcombustionchamber.Theradiusbladeisinstalledinatopnarrowingangleandpositionedtocutoutthestepusingtheradiusedendoftheblade.Onebladeormultiplebladesmaybeused.

• Specialsteppedbladesmaybeusedonrecessedseatswhenitisnecessarytoclearthecasting.

Power unit

ANewaypowerunitwilldramaticallyincreaseyourproductivity.Thedriveunitrollsfreelyalongthetrackforpositioningoverthevalveseat.Thevariablespeedcontrolallowsforsettingthemosteffectiveturningspeed.Mostseatmaterialsarecutbetweenturningspeedsof20RPMto50RPM.Forharderseatmaterialsuseslowerspeed.ExcessiveRPM(70ormore)maycauseprematuredullingofblades.

Thetransmissionunitfromthemotortothecutterhastwouniversaljointsandatelescopingsection.Thesocketshouldbepositioneddirectlyoverthevalveseatbeingcut.

oPeratInG InstructIons

• Placecylinderheadontoheadstands.

• Insertpilot,asdescribedpreviously.

• Adjustcylinderheadsuchthatthepilotisalignedtothetransmission.

• Placecutterontopilotandcarefullylowercutterontothevalveseat.Donotdropthecutterasthismaygougetheseatand/orchipthecarbideblades.

GEAR MOTOR

TRANSMISSION

TROLLEY

TRACK

SOCKET

HEAD STANDS

HEAD STANDS

CYLINDER HEAD

PILOT

TOP NARROWING

SEAT

TOP NARROWING

INSERT

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l 11

Power unit (continued)

• Placesocketontothecutter.Besurethetransmissionis

linedupoverthepilot.Thetransmissionshouldbeasstraightaspossible.

• Usingthefootswitch,startthemotortoproceedwithseatcuttingaspreviouslydescribed.Holdingthehandleapplyonlylightdownwardpressure.Excessivepressuremayflexthepilotand/orcauseprematuredullingofblades.

• Formoreaggressivestockremovalalternatebladesmaybeused.ContactNeway.

Basic Parts list

solID PIlots

100 Series—Forusewith100SeriesCuttersonly—.297"(7,5mm)HubI.D.

140 Series—Forusewith200/600/700SeriesCuttersonly—3/8"(9,5mm)HubI.D.

HUB: 1.Adjustableonlyontwo-sidedNarrowingCutters—200and600Series.

2.Fixed(notmovable)onallotherCutters.

513—3/8" (9.5mm) Hexfor100SeriesHeads

505—1/2" (12.7mm) Hexfor200,600,700SeriesHeads

503-1—3/8" Adaptor1/2"to3/8"

FLAT HEAD SCREW

WEDGE

SET SCREW

3/32" HEX KEY

5/64" HEX KEY

HUBHEAD

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l1 �

Basic Parts list (continued)

eXPanDaBle PIlots

Colletdiametersare,1mm(.003")lessthanstated,andexpandupto,5mm(.020")

120 Series—Forusewith100SeriesHeadsonly—.297"(7,5mm)HubI.D.

150 Series—Forusewith200/600/700SeriesHeads—3/8"(9,5mm)HubI.D.

200 Series—Forusewith200/600/700SeriesHeads—3/8"(9,5mm)HubI.D.(Theyareforengineswithlongvalveguides)

tunGsten carBIDe BlaDes

PART # LENGTH USED IN

152.. . . . . . . . . . . . . . . . . .1/2". . . . . . . . . . . . . .Non-serratedBlade(correctioncutters)

154. . . . . . . . . . . . . . . . . . . 3/4". . . . . . . . . . . . . .Non-serratedBlade(correctioncutters)

250. . . . . . . . . . . . . . . . . . .3/8". . . . . . . . . . . . . .0°thru46°SeatCutters

250LC. . . . . . . . . . . .3/8". . . . . . . . . . . . . .0°thru46°SeatCutters(hardseats)

251. . . . . . . . . . . . . . . . . . .1/2". . . . . . . . . . . . . .0°thru46°SeatCutters

251LC. . . . . . . . . . . .1/2". . . . . . . . . . . . . .0°thru46°SeatCutters(hardseats)

252. . . . . . . . . . . . . . . . . . .1/2". . . . . . . . . . . . . .60°thru80°CorrectionCutters

253. . . . . . . . . . . . . . . . . 5/16". . . . . . . . . . . . .0°thru46°SeatCutters

254. . . . . . . . . . . . . . . . . . . 3/4". . . . . . . . . . . . . .60°thru80°CorrectionCutters

352. . . . . . . . . . . . . . . . . . .1/2". . . . . . . . . . . . . .RadiusBlade(blendingpurpose)

354. . . . . . . . . . . . . . . . . . . 3/4". . . . . . . . . . . . . .RadiusBlade(blendingpurpose)

355. . . . . . . . . . . . . . . . . . .3/8". . . . . . . . . . . . . .RadiusBlade(blendingpurpose)

353. . . . . . . . . . . . . . . . . 5/16". . . . . . . . . . . . .HondaPowerProducts(stepped)

553. . . . . . . . . . . . . . . . . 5/16". . . . . . . . . . . . .SuzukiMotorcycles(short-angled)

* LC(largecoursetooth)bladestendtobemoreeffectiveonthehardestseatmaterials.Theymayalsobeusedformoreaggressivestockremovalonregualrorsoftseatmaterials(e.g.toenlargeseatforoversizedvalve).

152, 154

250, 251, 253

250 LC, 251 LC

252, 254

352,354, 355

353

553

STEM COLLET EXPANDER NUT

*

*

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Helpful suggestions

clean up cylinder head after cutting seats.

Washorrinsethoroughlywithacleaningsolution.

take proper care of cutters and pilots.

Toolsshouldbekeptintoolcase.Whenremovedfromcase,theyshouldbeplacedonaclothorpad.Theseprecisioninstrumentswilllastalongtimeifreasonablecareisused.

take proper care of cutting blades.

Serrationsonthebladesshouldbecleanedregularlywiththebrushprovidedwitheachkit.Atoothbrushmayalsobeused.

HANDLE WITH CARE

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Helpful suggestions (continued) cutting soft seats.

NewayCuttingFluid(awettingsolution)isrecommendedwhencuttingsoftseats.Thiswillreducechatterandimproveseatfinish.Neverusepetroleum-basedcuttingfluid.

cutting hard seats.

Neway'sL.C.(largecourse)bladesarerecommendedforcuttingespeciallyhardseats.Ingeneral,theyshouldnotbeusedonaveragetosoftseatmaterials.However,theymaybeusedonaveragetosoftseatswhereaggressivestockremovalistheobjective.Increasingcuttingpressure(feed)anddecreasingcuttingspeedwillalsoimproveresultsonhardseats.

repositioning worn or nicked blades.

ThecuttingbladesdoNOThavetobeinthesamerelativepositionofthehead.Bladesmaybeup,down,orcenteredintheirslots.Theywillalwaysbeonthesameplaneandangle.However,bladesmustextendovertheseatareatobecut,withpointedendstowardhub.Allbladesonthesamecuttingangleshouldbereplacedtogether.Sinceeachbladeisadjustable,wornportionsoranickcanbeadjustedawayfromthebladecontactarea.DONOTOVER-TIGHTEN.

assemble blades correctly.

Alwaysbesurepointedendsoncarbidebladesarepointingtowardthehub,orcenterofthehead.

HUB

ALWAYS TURN CLOCKWISE

HUB

POINTED ENDS OF BLADES

V a l V e S e a t C u t t e r I n S t r u C t I o n M a n u a l 1 �

troubleshooting

occasionally problems are encountered. here are simple solutions.

situations probable cause solution

Gouging Toomuchpressure.Turningspeedtoofast.

Applyonlylightpressure.Slowdown.UsetwohandsonT–Wrench.

Chatter Incorrectpressure. Applyonlylightpressure.

Loosepilot. Selectsnug-fittingpilotorreplacevalveguide.

Verysoftseats. ApplywettingsolutionsuchasNewayCuttingFluidonseats.DoNOTusepetroleum-basedcuttingfluids.

Eccentricity Toomuchpressure. Applyonlylightpressure.

Sideloadpressure. Applypressureovercenterlineofpilot.

Loosepilot. Selectsnug-fittingpilot,orreplacevalveguide.

Excessivevalveguidewear. Replacevalveguide.

“Load-up” in blade serrations

Toomuchpressure. Applyonlylightpressure.

Dirtoroil. Cleanserrations.

Excessive blade wear Toomuchpressure. Applyonlylightpressure.

Wrongbladeposition. Pointedendsofbladesmustbepointedtowardhub.

Blade chipping or breakage Roughhandlingorcutterdroppedontoseat.

Tungstencarbidebladesareveryhard,butbrittle,andshouldbehandledwithcare.

troubleshooting

occasionally problems are encountered. here are simple solutions.

situations probable cause solution

Gouging Toomuchpressure.Turningspeedtoofast.

Applyonlylightpressure.Slowdown.UsetwohandsonT–Wrench.

Chatter Incorrectpressure. Applyonlylightpressure.

Loosepilot. Selectsnug-fittingpilotorreplacevalveguide.

Verysoftseats. ApplywettingsolutionsuchasNewayCuttingFluidonseats.DoNOTusepetroleum-basedcuttingfluids.

Eccentricity Toomuchpressure. Applyonlylightpressure.

Sideloadpressure. Applypressureovercenterlineofpilot.

Loosepilot. Selectsnug-fittingpilot,orreplacevalveguide.

Excessivevalveguidewear. Replacevalveguide.

“Load-up” in blade serrations

Toomuchpressure. Applyonlylightpressure.

Dirtoroil. Cleanserrations.

Excessive blade wear Toomuchpressure. Applyonlylightpressure.

Wrongbladeposition. Pointedendsofbladesmustbepointedtowardhub.

Blade chipping or breakage Roughhandlingorcutterdroppedontoseat.

Tungstencarbidebladesareveryhard,butbrittle,andshouldbehandledwithcare.

Neway has been in business since 1952 manufacturing and distributing tools and equipment for valve seat reconditioning and valve reconditioning.

Our “trademark” product is the Neway valve seat cutter. Neway seat cutters are almost standard equipment

in shops that rebuild engines, whether the work is automotive, motorcycle, power equipment, or heavy

duty. Our tools are used all over the world in shops both big and small, by DIYers and production engine builders

alike. Neway cutters can be found at the track, in high performance test labs, and in use on OEM assembly lines. We believe that our product has been so successful for

one simple reason: it offers value. It's extremely easy to use, is accurate enough for high performance engine

work, and is inexpensive to purchase.

1-800-248-3889