Sandvik Coromant Parting and grooving - users guide - Manual (Page 37)

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Circlip grooving
For circlip grooving we have several main systems to choose from. For best economy use the
three edged U-Lock 154.0 system (width 1.15–4.15 mm) for both internal and external opera-
tions. The second choice is CoroCut with GF geometry (width 1.85–5.15 mm) giving good
productivity in external operations.
For internal machining in small holes from 10 mm diameter and width 0.73–1.70 mm, the
CoroCut is the first choice. For holes from 4.2 mm diameter and width 0.78–1.57 mm, the
CoroTurn XS can be used.
U-Lock 154.0 insert and CoroCut insert in GF.
All systems have sharp edges in order to generate a good cutting process and to achieve long
tool life.
Recommended grades and cutting data
Starting grade for U-Lock 154.0 is GC1020 and for CoroCut GF grade GC1125.
Cutting speed 150 m/min and feed 0.08 mm/r.
For milling of circlip grooves on non-rotation products, the CoroMill 327 is the first choice
from 10 mm diameter and widths from 0.7–5.15 mm. CoroMill 328 is the choice for produc-
tive milling from 39 mm diameter and width 1.3–5.15 mm.
CoroCut MB and CoroTurn XS for internal circlips.
CoroMill 327 and CoroMill 328 for milling of circlip in non-rotating components.