Общий каталог Yamawa 2021 - страница 387

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Forming Taps Intro SURZ MP Multi Purpose Series SP Thread Forming Taps for Stainless Steel, Coated FEATURES SL HSS-P COATING 2PTHCHT Multi purpose forming taps for blind and through holeapplication.Special form on thread root to control the minor diameterof internal threads. Special lobe shape to reduce tapping torque. PO Recommended Tapping Speeds Depending On Materials ISO Vc (m/min) ISO Vc (m/min) P1 15÷30 H M1 10÷25 H P2 15÷30 H M2 10÷25 H ST P3 15÷25 H P4 15÷25 H P7 10÷25 H H 1st choice I suitable ROLL JIS JIS-SURZ Product Features - Adopting the special form on thread root, SURZ controls the minor diameter geometry of internal threads. CARBIDE - Special lobe shape reduces the tapping torque. - High efficiency can be obtained in thread forming of stainless steel parts. - The minor diameter geometry of internal threads can be adjusted modifying the bored hole size. LONG Process Data M2×0.4 Work-material AISI 304 - 1.4301 M2x0.4 6H internal Recommended bored hole diameter before tapping HAND Tapping length 5.2mm (Blind hole) thread minor diameterand tolerance Unit : mm TAPS Tapping speed 5m/min Max. 1.679 Size Class Recommendedbored hole size Bored hole ø1.85 - ø1.82 Min. 1.567 MachineEG (STI)Feed Machining center (BT15) Tolerance 0.112 M1X0.25M1.2X0.25 G4G4Rigid 0.901.10 M1.4X0.3 G4 1.28 Tapping direction Vertical M1.6X0.2 G3 1.52 Lubricant Water soluble oil (×20) SPECIAL M1.6X0.35 G4 1.46 THREADS, Bored hole size φ1.82 φ1.81GAUGES M1.7X0.35 G4 1.56 M2X0.4 G4 1.82 Cross section M2.3X0.4 G4 2.12 THREAD picture of internalthreads M2.5X0.45 G4 2.30 MILLS M2.6X0.45 G5 2.40 Seam shape Small seams No seam M3X0.5 G5 2.77 DIES Minor diameter φ1.59 φ1.58 No.2-56UNC G4 1.98No.4-40UNCG52.55 Bored hole size φ1.84 φ1.83 No.6-32UNC G5 3.14 Based on our tapping test experiences the CENTER Cross section recommended bored hole diameters shown in DRILLS picture of internalthreads above table have been calculated aiming at 90%thread engagement and trying to avoid tap breakage. Technical Seam shape Regular seams Small seams Recommended bore hole diameter may changebecause material deformation can slightly change info Minor diameter φ1.62 φ1.60 depending on material, hardness, dimension of workpiece and tapping condition. 388