Overall Thread Thread+Neck Shank Shank Size of Length of
length length length length dia. square square

L ℓ ℓn ℓs Ds K ℓk


(for blind hole)
Spiral Fluted Taps Spiral Fluted Taps Spiral Pointed Taps
N-CT FC
Carbide Taps for Cast Irons
Specification


(for through hole)
■N-CT FC is the carbide tap suitable for hard and abrasive
materials such as cast irons. For volume production.

Recommended Tapping Speeds depending on Materials


(for through hole)
Cast irons Ductile cast irons Brass castings

5 15

5 15〜
5 15

(m/min) (m/min) (m/min)
For icon explanation, refer to P.50


Hand Taps
TYPE:1 TYPE:2


Carbide Taps
Cemented
Roll Taps
TYPE:3 TYPE:4


Simple Inspection Tools
Special Thread Taps
Segment:1L
L ℓ ℓn Ds K ℓk No. of
Size Class Code Chamfer Type Stock


Pipe Taps
(mm) (mm) (mm) (mm) (mm) (mm) flutes
For Metric Threads
TCNR1.4C3 3P
M1.4 × 0.3 P3 34 7 - 3 2.5 5 3 1 △
TCNR1.4C1 1.5P
TCNR1.6D3 3P
M1.6 × 0.35 P3
TCNR1.6D1 1.5P
36 8 - 3 2.5 5 3 1 △
Thread Mills
TCNR1.7D3 3P
M1.7 × 0.35 P3 36 8 - 3 2.5 5 3 1 △
TCNR1.7D1 1.5P
TCNR2.0E3 3P
M2 × 0.4 ○
Dies

P3 40 8 - 3 2.5 5 3 1
TCNR2.0E1 1.5P
TCNR2.2F3 3P
M2.2 × 0.45 P3 42 9.5 - 3 2.5 5 3 1 △
TCNR2.2F1 1.5P
TCNR2.3E3 3P
M2.3 × 0.4 P3 42 8 - 3 2.5 5 3 1 △
Center Drills


TCNR2.3E1 1.5P
TCNR2.5F3 3P
M2.5 × 0.45 P3 44 9.5 - 3 2.5 5 3 1 △
TCNR2.5F1 1.5P
TCNR2.6F3 3P
M2.6 × 0.45 P3 44 9.5 - 3 2.5 5 3 1 ○
Centering Tools


TCNR2.6F1 1.5P
TCNR3.0G3 3P
M3 × 0.5 P3 46 11 - 4 3.2 6 3 1 ◎
TCNR3.0G1 1.5P
M3 × 0.35 P3 TCNR3.0D3 3P 46 8 - 4 3.2 6 3 1 △
JIS
CT-4
◎=Standard ○=Semi standard △=Made to order
For improvement, spec may change without advance notice. 481