|
TABLE 8: THREAD MILLING OF ZIRCONIUM
| TOOL
MATERIAL |
SPEED
|
FEED
|
| AISI
|
fpm
|
in/tooth/rev
|
| (ISO)
|
(m/min)
|
(mm/tooth/rev)
|
| M2,
M7 |
115
|
.002
|
| (S4,
S2) |
(35)
|
(0.050)
|
TABLE 9: END MILLING OF ZIRCONIUM
| AXIAL
|
|
|
FEED
|
| DEPTH
|
TOOL
|
|
in/tooth
|
| OF
CUT |
MATERIAL
|
SPEED
|
(mm/tooth)
|
| |
|
|
Width
of Slot |
| In
|
AISI
|
fpm
|
3/8
in |
_
in |
_
in |
1-2
in |
| (mm)
|
(ISO)
|
(m/min)
|
(10mm)
|
(12mm)
|
(18mm)
|
(25-50mm)
|
| 0.030
|
T15,
M42 |
125
|
.0015
|
.002
|
.0025
|
.003
|
| 0.125
|
T15,
M42 |
100
|
.002
|
.0025
|
.003
|
.004
|
| dia/2
|
T15,
M42 |
75
|
.0015
|
.002
|
.0025
|
.003
|
| dia/1
|
T15,
M42 |
60
|
.0007
|
.001
|
.002
|
.0025
|
| (0.75)
|
(S9,
S11) |
(38)
|
(.038)
|
(.050)
|
(.063)
|
(.075)
|
| (3.0)
|
(S9,
S11) |
(30)
|
(.050)
|
(.063)
|
(.075)
|
(.102)
|
| (dia/2)
|
(S9,
S11) |
(23)
|
(.038)
|
(.050)
|
(.063)
|
(.075)
|
| (dia/1)
|
(S9,
S11) |
(18)
|
(.018)
|
(.025)
|
(.050)
|
(.063)
|
Drilling
Good results for drilling zirconium
can be achieved using the standard fresh ground (118¡) thin
webbed drill and a coolant lubricant. It is important to use
a firm backing to prevent burrs at the exit. Also, ensuring
a sufficient amount of stock material is left for reaming
can minimize smearing. Tapping zirconium is done best using
chip driver or gun type taps, but they must be kept sharp.
Data for specific drilling operations is given in Tables 10-13.
TABLE 10: DRILLING OF ZIRCONIUM
| |
|
FEED
|
| |
|
ipr
|
| TOOL
|
SPEED
|
(mm/r)
|
| |
|
Nominal
Hole Diameter |
| AISI
or C |
fpm
|
1/16
in |
1/8
in |
_
in |
_
in |
_
in |
1
in |
1-1/2
in |
2
in |
| (ISO)
|
(mm/min)
|
(1.5mm)
|
(3mm)
|
(6mm)
|
(12mm)
|
(18mm)
|
(25mm)
|
(35mm)
|
(50mm)
|
| M10,
M7, M1 |
55
|
.002
|
.003
|
.004
|
.006
|
.008
|
.010
|
.012
|
.015
|
| (S2,
S3) |
(17)
|
(.050)
|
(.075)
|
(.102)
|
(.15)
|
(.20)
|
(.25)
|
(.30)
|
(.40)
|
Five of Ten 1
2 3
4 5 6
7 8
9 10
|
