Sandvik Coromant Silent tools - application guide - Manual (Page 74)

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4. Boring
Finish boring
The finish boring tools are single-edge tools with radial micrometer
adjustment on the cutting unit head. Finishing is used when close
hole tolerances and excellent surface finish are needed.
Choose a light cutting insert with a positive cutting geometry. First
choice is knife-edge inserts (TCGT L-K). Use a small nose radius of
0.2 mm (0.008 inch), maximum 0.4 mm (0.016 inch).
Tolerance of hole diameter
For finishing with one insert, a tolerance of IT7 can be achieved in
good conditions. The tolerance will be influenced by the clamping
of the tool holder, fixtures of the component and wear of insert.
We recommend a measuring cut to decide what adjustments are
needed to compensate for tool deflection. To achieve good surface
finish and close hole tolerances, it is also important to use cutting
fluids to prevent recutting of chips and heat expansion of the tool
and workpiece.
Finish boring cartridge
and insert