Page 598 - Yamawa_European_Catalogue_YEU21

Thread Mills

PRML
Intro

SP
Premium Thread Mills

FEATURES
Ultra-fi ne micrograin carbide
SL HF Specific design and special coating for extraordinary
CARBIDE COATING thread surface fi nishing.
Low cutting resistance and reduced side forces, allow
to produce internal threads with high accuracy and
straightness.
PO RECOMMENDED APPLICATIONS
ISO ISO
P1 H K1 H
P2 H K2 H
ST P3 H
P4 H
WATCH
P5 H THE VIDEO
ROLL P6 H
H 1st choice I suitable
YMW-PRML
Product Features
CARBIDE The PRML is a left hand cutting tool.
Work-materials Vc (m/min) Feed per tooth The tool rotates counter clockwise.
fz (mm/t)
The PRML feeds in the Z axis from the top as shown below.
Thermal Refi ned Steel 35 to 45HRC 40÷100 0.02÷0.05
Thermal Refi ned Steel 25 to 35HRC 40÷100 0.03÷0.06
LONG Grey Cast Iron 40÷100 0.02÷0.05
Nodular Cast Iron 40÷100 0.02÷0.05
Alloy Steel 40÷100 0.04÷0.06
High Carbon Steel 40÷100 0.04÷0.06
HAND Medium Carbon Steel 60÷100 0.03÷0.05
TAPS Low Carbon Steel 60÷100 0.03÷0.05

Process Data
EG (STI) PRML 9.0P1.75 M12x1.75 Degradation of Pitch Diameter
Work-material 42CrMo4 - 1.7225 (30HRC)
Cutting Speed 100 m/min
Feed per tooth fz 0.06 mm/t
SPECIAL
THREADS, Cutting Depth 24 mm
GAUGES Hole diameter ø10.3
Number of insection 1
Machine Machining Center (BT30)
THREAD Lubricant Water soluble oil (x20)
MILLS
YMW

DIES Internal coolant External coolant

No chips Excellent fi nishing Residual chips Bad fi nishing

CENTER
DRILLS

Technical
info

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