Sandvik Coromant Silent tools - application guide - Manual (Page 29)

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2. Milling
Applying Silent Tools to a shoulder milling operation in a valve
housing resulted in increased metal removal and improved surface
finish. Even with the increase in speed, depth of cut and spindle
speed, there were no vibration tendencies. The results are conclu-
sive: 149 % increase in productivity and return on investment after
nine weeks!
Operation Shoulder milling – circular interpolation
Workpiece material CMC 09.1, K3.2.C.UT, Nodular cast iron
Machine cost 195 EUR/hour
Machined volume 179 (10.92)/pc cm 3 (inch 3 )
ZEFF 5
Assembly length 280 mm (11.024 inch)
Reference Silent Tools
Adaptor C6-391.05 CD-22 200
Cutting head R390-066 Q22-18M
Cutting data
n (r/min)
700 1352
v
c
(m/min (ft/min)) 176 (577) 280 (918)
f
z
(mm (inch)) 0.31 (0.012) 0.27 (0.010)
v
f
(mm/min (inch/min)) 687 (27.05) 1 156 (45.52)
v
fa
(mm/min (inch/min)) 8.0 (0.315) 19.0 (0.748)
AP (mm (inch)) 4.0 (0.158) 6.0 (0.236)
a
e
(mm (inch)) 18.59 (0.732) 18.59 (0.732)
Tot. cycle time 30.07 min 12.08 min
Tool life (no of comp.) 10 20
Application examples
Case one: Valve house