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CoroTurn® Prime

Extraordinary productivity for internal turning applications

With the CoroTurn® Prime SL head solution, it is now possible to use our PrimeTurning™ methodology for internal turning. The inside-out machining capability allows for excellent chip evacuation and chip control.

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The geometry for difficult-to-machine materials

Achieving good chip control has always been difficult in low-carbon and high-strength steels. The -H3 geometry is optimized for these materials, eliminating concerns about chip control.

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Fast tool indexing

With two inserts in the holder, the CoroTurn® Prime Twin-tool saves significant time when changing tools to increase machine utilization and productivity.

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View More Features
  • Flexibility to do turning in all directions
  • Wiper insert available for excellent surface finish
  • Double the speed and feed rates to enable faster metal removal
  • Shim-protected tip seat for security
  • TR-style locking interface for stability
  • Over- and under-coolant with Coromant Capto® holders and QS™ shanks
Small entering angles

The small entering angle (KAPR) will create a thin and wide chip, which spreads the load and heat away from the nose radius. This results in increased tool life, or allows for increasing cutting data.

Entering and lead angles:

A-type KAPR = 30°, PSIR = 60°
B-type KAPR = 25°, PSIR = 65°

Efficient edge utilization

CoroTurn® Prime inserts have three edges per corner. One edge each for longitudinal, facing, and profiling, distributing the wear over a longer edge and not just the insert tip. It also moves heat away from the cutting zone, helping inserts last substantially longer.

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Find your tool and buy

Application area

Turning operations in all directions
  • CoroTurn® Prime A-type tool with three 35° corners designed for light roughing, finishing, and profiling
  • CoroTurn® Prime B-type tool with strong corners designed for rough machining
  • Machines: Turning centers, vertical lathes, and multi-task machines
  • Good choice for mass production or components that require frequent setups and tool changes
  • External Turning: Best suited for short and compact components and slender ones using tail stock
  • Internal turning: Large diameters above 90 mm (3.5 inches) and overhangs up to 8–10 × D
  • Steel
  • Stainless steel
  • Cast iron
  • Heat resistant super alloys

Product range

Coromant Capto<sup>®</sup>

Tool holders
Radial holders, size: C4, C5, and C6
Axial holders, size: C5 and C6
Multi-task holders, size: C5, C6, and C8
Multi-task Twin-tool holders, size: C6 and C8

QS™ shanks

Sizes: 2020, 2525, 12 (¾"), and 16 (1")

Shank

Sizes: 2020, 2525, 3232, 12 (¾"), 16 (1"), and 20 (1 ¼")

SL head

Size: 40 mm (1.575")

A-type insert

Grades: GC4325, GC2025, and GC1115
Geometries: -L5 and -L5W
Insert shape: 35° corner

B-type insert

Grades: GC4325, GC2025, GC1115, and H13A
Geometries: -M5, -M5W, -H3, and -H3W
Insert shape: Tip-shaped as CNMG

PrimeTurning™ code generator

Secure maximum output with PrimeTurning™ code generator that supplies programming codes and techniques to set up proper parameters and variables for a particular application. Compatible with various CNC systems.

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Highlights

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See it to believe it

Doubling speed and feed rates enables faster metal removal for more parts per run.

Does PrimeTurning™ fit my production?

We are introducing a completely new turning concept, including method and tools, unlike anything ever seen before.

Connected Solutions for CAM Programming

The Mastercam® 2018 release includes turning strategies supporting the new innovative PrimeTurning™ methodology for highly productive turning in all directions, as well as integration of CoroPlus® ToolLibrary.

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