|
"TRI-FLUTE DRILLS"
FEED and
SPEED RECOMMENDATIONS
|
Material
|
Speed-SFM (m/min)
|
Feed Rate Inch/Rev (mm)
|
|
|
|
1/8"-3-16"
|
3/16"-5/16"
|
5/16"-7/16"
|
7/16"-9/16"
|
9/16"-5/8"
|
5/8"-3/4"
|
|
|
|
(3mm-5mm)
|
(5mm-8mm)
|
(8mm-11mm)
|
(11mm-14mm)
|
(14mm-16mm)
|
(16mm-19mm)
|
|
Steel-Unalloyed
|
260-395
|
.0025-.004
|
.003-.006
|
.005-.008
|
.006-.010
|
.008-.012
|
.010-.012
|
|
up to 205 HB
|
(79-120)
|
(.07-.10)
|
(.08-.15)
|
(.13-.20)
|
(.15-.25)
|
(.20-.30)
|
(.25-.30)
|
|
Steel-Alloyed
|
260-330
|
.0025-.004
|
.003.006
|
.005-.008
|
.006-.010
|
.008-.012
|
.010-.012
|
|
up to 300 HB
|
(79-100)
|
(.07-.10)
|
(.08-.15)
|
(.13-.20)
|
(.15-.25)
|
(.20-.30)
|
(.25-.30)
|
|
over 300HB
|
200-300
|
.0015-.003
|
.0025-.004
|
.004-.006
|
.005-.006
|
.005-.007
|
.006-.008
|
|
(61-100)
|
(.04-.08)
|
(.07-.10)
|
(.10-.15)
|
(.13-.15)
|
(.13-.17)
|
(.15-.20)
|
|
Cast Iron
|
260-395
|
.003-.007
|
.0055-.010
|
.007-.012
|
.009-.014
|
.010-.017
|
.012-.17
|
|
(79-120)
|
(.08-.17)
|
(.14-.25)
|
(.17-.30)
|
(.23-.35)
|
(.25-.43)
|
(.30-.43)
|
|
Aluminum
|
330-490
|
.003-.007
|
.0055-.010
|
.007-.012
|
.009-.014
|
.010-.017
|
.012-.017
|
|
Silicon Alloys
|
(100-149)
|
(.08-.17)
|
(.14-.25)
|
(.17-.30)
|
(.23-.35)
|
(.25-.43)
|
(.30-.43)
|
|
Aluminum
|
260-395
|
.003-.007
|
.0055-.010
|
.007-.012
|
.009-.014
|
.010-.017
|
.012-.017
|
|
over 13% Silicon
|
(79-120)
|
(.08-.17)
|
(.14-.25)
|
(.17-.30)
|
(.25-.35)
|
(.25-.43)
|
(.30-.43)
|
|
Titanium
|
100-165
|
.0015-.003
|
.0025-.005
|
.004-.007
|
.0055-.0085
|
.008-.010
|
.008-.012
|
|
|
(30-50)
|
(.04-.08)
|
(.07-.13)
|
(.10-.17)
|
(.14-.22)
|
(.20-.25)
|
(.20-.30)
|
|
