Page 626 - Yamawa_European_Catalogue_YEU21

Center Drills

MHCDS
Intro

SP
Center Drills for Medium Hardness Carbon Steel for High
Speed machining, HSSCo Coated
FEATURES
Single-ended center drills for high accuracy in center hole
SL drilling.
HSS-Co COATING
Easy positioning and high precision machining.
HSSCo and special coating for long and stable life even
on medium hard materials.
PO
P2 P3 P4

Carbon and Medium
Work-materials low alloy alloy steel
ST steel
Vc (m/min) 30÷45 30÷45
DC fn (mm/rev) fn (mm/rev)
WATCH
1 0.10 0.10
THE VIDEO
1.5 0.10 0.10
ROLL 2 0.15 0.15
2.5 0.15 0.15
YMW-MHCDS
3 0.15 0.15
4 0.20 0.20
CARBIDE 5 0.20 0.20
6 0.20 0.20

LONG
Cutting Data

HAND Great extension of tool life with MHCDS
TAPS
The pictures on the right show the diff erent Cutting Condition
damage of MHCDS and a market alternative
cutting edge after 480 holes machined at the Size: 3x60°x8
same cutting condition. As shown, the MHCDS Material: Ck60 - 1.1221
EG (STI) has smaller wear and edge damage allowing Machine: NC lathe
the MHCDS to run much further than a standard Cutting speed: 30m/min
center drill. Feed: 0.15mm/rev
Lubricant : water soluble oil
SPECIAL
THREADS, Market alternative MHCDS
GAUGES
Great improvement in surface roughness and circularity with MHCDS
THREAD Under the cutting condition stated above, the surface fi nish of center-drilled hole has Circularity of center dril-
Enlarged picture
MILLS been greatly improved. Circularity of center drilled hole as well as run-out tolerance of led 60° face
turning axis has been improved.
90
μm Surface roughness of center drilled 60° face 135 45
DIES
180 0

225 315
CENTER 0 0.5 1.0 1.5 2.0 270
DRILLS
YMW

Technical
info

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