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JIS SURZ

SU Roll Taps

Specification

Coating <1.5D

Recommended Tapping Speeds depending on Materials

Low carbon steels Medium carbon steels Stainless steels

低炭素鋼5中炭素鋼5ステンレス鋼5
(m/min)(m/min)( m/ min)

Product Features ●Adopting the special form on tap's root, SURZ controls the minor diameter geometry of internal threads. ●Special lobe shape realizes low tapping torque. ●High efficiency can be obtained in thread forming of stainless steel parts.

●By adjusting bored hole size, you can adjust the minor diameter geometry of internal threads.

Tapping Data

Tapping condition [ M2×0.4 ]

Work Material SUS304

Tapping Length 5.2mm（Blind hole）

Bored Hole Size φ1.85〜φ1.82 POINT

Tapping Speed 5m/min

Feed Rigid In use, please select proper bored hole diameter.

Tapping Vertical Direction Machining center

Machine

（BT15）

Water soluble cutting fluid

Tapping Fluid

(×20) Recommended bored hole diameter

Bored Hole Size φ 1.84 φ 1.83 before tapping

Unit : mm

SizeClassRecommended Bored Hole Size
M1×0.25G40.90
M1.2×0.25G41.10
M1.4×0.3G41.28
M1.6×0.2G31.52
M1.6×0.35G41.46
M1.7×0.35G41.56
M2×0.4G41.82
M2.3×0.4G42.12
M2.5×0.45G42.30
M2.6×0.45G52.40
M3×0.5G52.77
No.2-56UNCG41.98
No.4-40UNCG52.55
No.6-32UNCG53.14

Threads

Bored Hole Size 1.82 1.81

Section

Seam Shape Seams remain a little.

Minor Diameter φ 1.59

M2×0.4 6H Internal Thread Minor Diameter and Tolerance

Max.1.679
Min.1.567
Tolerance0.112

No seam remains. φ 1.58

  • Recommended bored hole diameters shown in above table have been calculated by aiming at the thread engagement of 90% and by considering avoidance of tap breakage, based on our past tapping test experiences.
  • Recommended bore hole diameter may change because material deformation can slightly change depending on material, hardness, dimension of workpiece and tapping condition.