JIS SU2-SP

SpiralFlutedTapsforToughStainlessSteels

Specification

Oxide

Recommended Tapping Speeds depending on Materials

Low carbon steelsMedium carbon steelsHigh carbon steelsAlloy steelsStainless steels
5低炭素鋼205中炭素鋼205高炭素鋼205合金鋼205ステンレス鋼15
(m/min)(m/min)( m/ min)(m/min)(m/min)

Product Features ●TheSU2-SPisaspiralflutetapforhardtocutstainlesssteelthatisoptimumforblindhole BLFShape machiningofstainlesssteelsuchasSUS316andSUS317. ●Itisaspecialdesignoffullthreadsforthefirstfewthreadsandthebalancearehalfthethreadheight. ●Withthisspecialshape,itiseffectiveinthepreventionofflutechippingofthefullthreads.Itreduces tappingtorqueandhasgoodabrasionresistancewhileallowingtomaintainthescrewthreadguide specifications. ●Ithasimprovedchipejectionfromtheuniqueflutedesign. Tapping Data Thread Size [M12×1.75]

Workpiece MaterialSUS316SU2-SP
Bored Hole Sizeφ10.3
Can Continue
Tapping Length25mm blind hole
Machinery TypeCNC tapping machineSU-SP
Tapping Speed8m/min

0 200 400 600 800

Tapping Fluid Non-water soluble cutting oil (Number of holes processed.)

Characteristics of stainless steel

・Itworkhardenseasily.Chipweldingoccursfrequently. Type of Material Element Content (%)

Type of MaterialElement Content (%)
NiCr
SUS3038.00〜10.0017.00〜19.00
SUS3048.00〜10.5018.00〜20.00
SUS31610.00〜14.0016.00〜18.00
SUS31711.00〜15.0018.00〜20.00

・Toolfrictiontendstooccur.

In general wear, austenitic stainless steel have the characteristics described above and are regarded as difficult to cut materials. Among Austenitic stainless steel with the Ni content of more than 10% such as SUS 316 is regarded as "difficult-to-cut stainless steel".