
Roll Tap Series
Spiral Pointed Taps Spiral Fluted Taps Spiral Fluted Taps
(for blind hole)
MHRZ
Roll Taps for Carbon Steels of Middle Hardness
Specification
(for through hole)
Coating 2D
Recommended Tapping Speeds depending on Materials
(for through hole)
Medium alloy steel and
High alloy steel Tool steel
heat treated steel
IS P IS P IS P
10 30 10 30 10 20
〜 〜 〜
(m/min) (m/min) (m/min)
For icon explanation, refer to P.50
Hand Taps
Product features
●Due to Yamawa's proprietary design, the tapping torque decreases.
●With a combination of wear-resistant tool material and a unique coating, the tool's durability improves tremendously.
●Consistent tapping of Heat treated steels(~ 35HRC)is ensured.
Cemented
Carbide Taps
●Tapping with water soluble tapping fluid is possible.
Tapping data
Tapping result(number of holes) Comparison of tapping torque
Roll Taps
MHRZ still runnin
MHRZ Previous Tap
(N ) (N )
previous tap trouble at 1st tapping 3000 10000
2500 9500
0 200 400 600 800 1000(No. of holls) 2000 9000
Special Thread Taps
Pipe Taps Simple Inspection Tools
1500 8500
Tapping condition [ M12×1.5 ] 1000 1000
Work material 42 CrMo 4(Heat treated steels)/ 35HRC 500 500
0 0
Tapping speed 20m/min
-500 -500
Hole size φ11.3mm
-1000 -1000
Tapping length 18mm, through hole -1500 -1500
Machine MC(Synchronous feed)
Consistent tapping in 42 CrMo 4(Heat treated steels ) at 35HRC becomes possible.
Tapping fluid Water soluble oil Before the MHRZ, this material was thought to be difficult for thread forming.
Thread Mills
Application (Cutting tap)
No more entangled chips
Materials
Tapping speed worries!!
Slow Fast
~ 35HRC
Thermal
Dies
refined MHRZ
steels
~ 25HRC
Alloy SCM
steels ◆By adopting roll taps, the worries about the problems
HP+RZ caused by chips are completely solved.
High
Internal thread Internal thread
HP-RZ
Center Drills
carbon S45C R+V OL+RZ
steels R-V OL-RZ by roll tap by cutting tap
Middle S45C
carbon
N+RZ
steels S30C N-RZ
5m/min 10m/min 15m/min 20m/min 25m/min 30m/min 35m/min
◆A great improvement in surface finish of internal threads
Centering Tools
Obtainable from Video site
DIN
shown in right
RO-9
174