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CoroTurn® 107

Maximize quality with fixed insert indexes

Inserts and tool holders with rail interface ensure mounting security and offer secure machining for profiling and pocketing applications. When the insert is indexed the same way every time you can increase productivity and achieve higher quality.

Unobstructed chip flow

Screw clamp design of CoroTurn® 107 ensures stability and unobstructed chip flow while turning. It is easy to handle, clean and maintain.

Excellent chip control

​Tool holders are equipped with nozzles that direct precision coolant right at the insert edge to boost process security and provide excellent chip control.

Learn more about precision coolant


View more features
  • ​​​​​​​​​​​​​Wiper geometries available for high feeds and high quality surface finish
  • Low cutting forces and precision coolant combined with a broad range of inserts ensures high quality surface finish.
  • Ground, extremely sharp insert offer for exceptional surface finish
  • Holders with conventional and precision coolant design

Find your tool and buy


CoroTurn® 107
Internal operations:
  • Long overhangs, 4–6 × D
  • Longitudinal turning and profiling
  • Boring holes, from diameter 6 mm (0.236 inch)
External operations:
  • Small and slender or thin-walled components
  • Longitudinal turning, facing and profiling
  • Pocketing with non-linear methods, e.g. dynamic turning and waveform
  • Steel
  • Stainless steel
  • Cast iron
  • Non-ferrous metals
  • Heat resistant super alloys
  • Hardened materials

Product range

Coromant Capto®


External turning: C3, C4, C5, C6, C7, C8
Internal turning: C3, C4, C5 and C6​
Rail interface:​ C5 and C6

Shank tools

8x8 (3/8 inch) to 32x25 (1 1/4 inch)

QS™ Swiss shanks

8x8 (3/8 inch) to 16x16 (5/8 inch)

QS™ shanks

2020 (3/4 inch) and 2525 (1 inch)
Rail interface, sizes: 2020 (3/4 inch) and 2525 (1 inch)

Boring bars

5 (¼ inch) to 40 (1 ½ inch​)

CoroTurn® SL heads

16 to 40​
Rail interface, size: 70


  • 5°, 7° clearance angle
  • All types of insert shapes and sizes
  • Geometries and grades for all application areas
  • Insert grades also in advanced cutting materials PCD, CBN, and ceramics

Round inserts with rail interface

Indexes: 6, 8 or 12
Grades: GC1105, GC2220, GC4425, CB7014
Geometries: ​-L3, -M3 and -H7
Use with rail interface tool holders

Note! The round inserts with rail interface also fit conventional CoroTurn® 107 tool holders but will then lose the benefit of indexability. However, the rail interface tool holders can only be used with inserts with rail interface.

CoroTurn 107

Tool description

CoroTurn® 107 is optimized for internal and external turning of slender components. Sharp cutting edges and excellent chip control ensure a soft cutting action and low cutting forces, providing an exceptional surface finish.

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CoroTurn® 107 with rail interface

Use the round inserts and tool holders with rail interface for secure machining of your profiling and pocketing applications. The rail interface locks the rotation of the insert, minimizing unwanted stops from insert or screw breakage. Tool holders are available with over and under coolant for good chip control and high process security.

To boost your productivity in HRSA materials, use the screw-mounted CBN platform, with up to 12 insert indexes.

Learn more about machining HRSA aerospace components



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CoroTurn® 107 with rail interface

Watch the demo to see it in action.

Improve process security in steel turning

Successful steel turning involves several challenges. One is to keep your machine running securely with good chip control in order to reduce tool breakages and scrapped components. What is your main steel turning challenge?

Damped tools for improved productivity

Get advanced damping qualities with Silent Tools™ for CoroTurn® 107. These bars and adaptors enable good productivity and stable machining in all turning operations especially for overhangs up to 14 x bar diameter, narrow entries and hard-to-reach seats.

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