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Create Outstanding Thread Surface with the innovative PRML Thread Mills! The Premium Thread Mills The Premium Thread Mills

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Page 1: The Premium Thread Mills -  · PDF fileThe Premium Thread Mills Create Outstanding Thread Surface with the innovative PRML Thread Mills! The Premium Thread Mills

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Page 2: The Premium Thread Mills -  · PDF fileThe Premium Thread Mills Create Outstanding Thread Surface with the innovative PRML Thread Mills! The Premium Thread Mills

YAMAWA EUROPE S.p.A. - Via Don F. Tosatto 8 - 30174 Mestre - Venezia, Italy - t. +39 041 952.543 - f. +39 041 962.838 - [email protected] - www.yamawa.eu

WarningTools may shatter. Wear cover or eye glass to avoid injury during tapping.Tools may be shatter. Use tools under the proper tapping condition.Never wear gloves during turning operations as the gloves may get caught with the tools.Wear safety shoes to avoid injuring yourself by the falling tools.On attaching tools to the machine, fasten firmly to avoid chattering and run-out.Fasten the workpieces firmly so that they never move during operation. Never use worn tools or damaged tools with chipping.Take a special care to fire trouble. High temperature during machining may cause fire.

Please note that specification may change without advance notice.

HF: Ultra micro grain cemented carbide

3 Screw Threads For internal screwthreads

The Premium Thread MillsDimensions and sizes

Left Hand Cutunit: mm

Size Product code

Ds

Dc

DsDc L

L

No. offlutes

Oil holesize MSRP(JPY)The Smallest Internal

Screw Thread (Dmin.)The LargestProcessing

Depth

How to use PRMLCan be applied to various workpiece materialsRecommended Process Conditions

*RPM and Feed Rate;

Degradation of Pitch Diameter

The PRML is a left hand cutting tool. The tool rotates counter clockwise.The PRML feeds in the Z axis from the top as shown below.

Z axis

Z axis

Workpiece material

Thermal Refined Steel 35 to 45HRC

Thermal Refined Steel 25 to 35HRC

Cast Iron FC

Ductile Cast Iron FCD

Alloy Steel SCM

High Carbon Steel S45C, etc.

Medium Carbon Steel S25C-S45C

Low Carbon Steel S20C/SS400, etc.

Feed per tooth fz(mm/t)

40 to 100

40 to 100

40 to 100

40 to 100

40 to 100

40 to 100

60 to 100

60 to 100

0.02 to 0.05

0.03 to 0.06

0.02 to 0.05

0.02 to 0.05

0.04 to 0.06

0.04 to 0.06

0.03 to 0.05

0.03 to 0.05

RPM (min-1)=1000 mm x Cutting Speed/3.14/Outside Diameter (Dc) of PRML cutter.Feed Rate (mm/min)=fz (mm/t) x No. of flutes x RPM x (Major diameter of internal screw thread - Dc)/Major diameter of internal screw thread)

Process Data

Workpiece material

Cutting Speed

Feed per tooth fz

Cutting Depth

Hole diameter

Number of insection

Machine

Cutting Fluid

SCM440 (30HRC)

100 m/min

0.06 mm/t

24 mm

10.3

1

Machining Center (BT30)

Water Soluble (Emulsion x 20)

Process Conditions: PRML 9.0P1.75 M12x1.75

* No Program Correction

ConventionalProduct

Long Tool Life

Internal coolant External coolant

Chips

Internal Surface

Internal coolant is recommendedfor blind hole thread milling

2 099999 830864