JIS ZEN-B

SpiralFlutedTapsforNickelBaseAlloys

Specification

Oxide

Recommended Tapping Speeds depending on Materials

Low carbon steelsMedium carbon steelsStainless steelsNickel base alloys
5低炭素鋼155中炭素鋼155ステンレス鋼15ニッケル基合金510
(m/min)(m/min)( m/ min)(m/min)

Product Features ●Thetapisproducedfromahighgradepowderhighspeedsteelthatisexcellentforheatresistanceandwearresistance. ●TheoptimumthreadreliefisadoptedinconsiderationoftheshrinkageandcuttingheatforNickelBaseAlloys. ●TheZEN-Bhasaflutedesignfornickelbasealloytosmooththedischargeofchips.

●Optimumsurfacetreatmentisappliedtopreventwelding. ●Consideringtheshrinkageoftheinternalscrewthread,thetapisproducedtoamoderateoversizecondition.

Tapping Data

Tapping Conditions [M6×1]

Work Piece MaterialHastelloy C-276
Bored Hole Sizeφ5.0ZEN-B
Tapping Length10mmC Ci
Tapping Speed5m/minan ontnue
Machinery TypeCNC tapping center lGeneral PurposeSP
Tapping FluidWater soluble cutting fluid
0 20406080120 100
(Numberof holes processed)

Characteristics of nickel base alloys

●Nickelbasedalloyshavemuchbettercorrosionandheatresistancethansteel.Ingeneral,nickelbasedalloysaremuchmore

difficulttoprocessthansteelsandstainlesssteels.NickelbasedalloysincludeA286,inconels,hastelloys,waspaloysandmore. Therearemanykindsofnickelbasedalloys,butoneofthemoredifficultonestocutisinconel718.

Types of tapping problems

●Nickelbasedalloyshavehightemperaturestrengthandthethermaldiffusivityissmallso,abruptabrasionoccursonthetap. ●Thematerialtendstospringbackso,internalthreadsmayshrinkorthetapmaybecrimpedcausingbreakage.

●Thematerialtendstocauseweldingonthecuttingchamferandthethreadflanksurface.Thefinishedsurfaceoftheinternal

screwthreadcanbecomerough.