MHRZ

Roll Taps for Carbon Steels of Middle Hardness

Specification

Coating 2D

Recommended Tapping Speeds depending on Materials

Medium alloy steel and

heat treated steelHigh alloy steelTool steel
IS PIS PIS P
10〜3010〜3010〜20
(m/min)(m/min)(m/min)

For icon explanation, refer to P.50 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. ●Tapping with water soluble tapping fluid is possible.

Tapping data

Tapping result(number of holes) Comparison of tapping torque

MHRZ still runninstill runnin MHRZ Previous Tap

(N ) (N )

previous taptrouble at1sttapping
0200 400600800 1000(No. of holls)

2500 9500 1500 8500

Tapping condition [ M12×1.5 ] 1000 1000

Work material42 CrMo 4(Heat treated steels)/ 35HRC
Tapping speed20m/min
Hole sizeφ11.3mm
Tapping length18mm, through hole
Machine lMC(Synchronous feed)
Tapping fluidWater soluble oil

-500 -500 -1000 -1000

Consistent tapping in 42 CrMo 4(Heat treated steels ) at 35HRC becomes possible.

Application No more (Cutting tap)

worries!! entangled chips Tapping speed Materials Slow Fast

  • 35HRC

Thermal refined MHRZ steels

  • 25HRC

Alloy SCM ◆ By adopting roll taps, the worries about the problems steels HP+RZ caused by chips are completely solved.

High HP-RZ Internal thread Internal thread

carbonS45CR+V
OL+RZ
steelsR-Vby cutting tap by roll tap
OL-RZ
MiddleS45C
N+RZ
carbon
steelsS30CN-RZ

5m/min 10m/min 15m/min 20m/min 25m/min 30m/min 35m/min ◆A great improvement in surface finish of internal threads

Obtainable from Video site

DIN shown in right