Sandvik Coromant Parting and grooving - users guide - Manual (Page 22)

20
Machining specification
Operation: Parting off to centre
Material: JIS SCM 415, CMC 02.1, HB 240
Toolholder: LF123F10-2525B
Insert: N123F2-0250-003-CR
Grade: GC1125
Cutting data
Width of insert:
Cutting speed:
Feed (reduced at the end):
Time in cut:
Components:
Competitor
2.0 mm
129 m/min
0.05 mm/r
0.11 min
1200 pcs
Sandvik Coromant
2.0 mm
129 m/min
0.07 mm/r
0.08 min
2600 pcs
Parting of bars
When parting it is recommended to use an
insert as narrow as possible in order to save
material and minimise cutting forces.
Long overhangs (a
r
) causing instability could
result in tool failure and poor component
quality.
The recommended overhang should not
exceed 8 x la (width of insert).
Select correct width, geometry and system for parting of bars
Tool life +116% Productivity +40% Annual time saving 175 hours
Recommended grade and cutting data
Starting grade is GC2135. Cutting speed 125 m/min.
For more information about grades, see page 71.
Ø 20.5
15
Case story
Component
dia, mm Insert width,
I
a
, mm
Insert
geometry Tool system Feed start
value, mm/r
< 8 1 CM/CS CoroCut3 0.05
8–12 1.5 CM CoroCut 2&3 0.07
12–16 2 CM CoroCut 2 0.08
16–24 2.5 CR CoroCut 2 0.08
24–32 3 CR CoroCut 2 0.12
32–40 4 CR CoroCut 2 0.15
40–48 5 4E Q-Cut 0.18
48–56 6 4E Q-Cut 0.20