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JIS MHRZ

Roll Taps for Medium Hardness Carbon Steels

Specification

Coating

Recommended Tapping Speeds depending on Materials

Medium carbon steelsHigh carbon steelsAlloy steelsThermal refined steels
10中炭素鋼30 10高炭素鋼30 10合金鋼30 10調質鋼20
(m/min)(m/min)( m/ min)(m/min)

25〜35HRC Product Features ●Torque reduction is achieved from the new design and specifications. ●Tool life is dramatically improved with superb tool materials and coatings offering excellent wear resistance.

●Stable screw thread tapping in thermal refined material up to 35 HRC. ●The MHRZ roll form taps can be used with water soluble cutting fluid.

Tapping Data Comparison of tapping torque

Tapping Conditions [M12×1.5] MHRZ Conventional Product

Workpiece MaterialＳＣＭ440/35HRC
Bored Hole Sizeφ11.3
Tapping Length18mm through hole
Tapping Speed20m/min
Machinery TypeMC (perfect synchronous feed) l
Tapping FluidWater soluble cutting fluid

（N･㎝） （N･㎝）

2000 9000 1500 8500

0 0

Comparison chart for the number of holes processed-500-500
-1000-1000
-1500-1500
MHRZThe tapping torque is high, and stable internal screw thread roll form tapping is
possible even for SCM 440 (refining) with a hardness of 35 HRC. This material
Could not complete first hole.Can Continuehardness was thought to be difficult with roll tap in the past, but how it is possible.
Conventional
Product
02004006008001,000(Cutting tap)
（Number of holes processed）Tangled chips
Troubleshooting!
Recommended speed chart
WorkpieceTapping Speed

Material Slow Fast

  • 35HRC MHRZ

Refined Steel

  • 25HRC ◆ Eliminate problem of tangled chip by using roll taps!
AlloyRoll tapped threadCutting tap thread
SteelSCM
HP+RZ
HighHP-RZ
CarbonS45CR+VOL+RZ
SteelR-VOL-RZ
Medium
S45CN+RZ
Carbon◆ Thread surface finish improvement!
SteelS30CN-RZ

5m/min 10m/min 15m/min 20m/min 25m/min 30m/min 35m/min You can also see it from the video site on the right.