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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 finishing operations in ductile materials

The -L4 geometry is optimized for machining low-carbon and high-strength steel, duplex stainless steel and titanium at low to medium feed rates. Delivers outstanding productivity even at lower feed rates, due to increased cutting speed and/or longer tool life compared to conventional turning.

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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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  • Flexibility to do turning in all directions
  • Wiper insert available for excellent surface finish
  • Double the speed and feed rates 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 thus 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 centres, vertical lathes and multi-task machines
  • Good choice for mass production or components needing frequent set-ups and tool changes
  • External turning: Best suited for short and compact components and the slender ones using tail stock
  • Internal turning: Large diameters above 90 mm (3.5 inch) and overhangs up to 8–10 × D
  • Aciers
  • Aciers inoxydables
  • Fontes
  • Superalliages réfractaires

Product range

Coromant Capto®

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

QS™ shanks

Sizes: 2020, 2525, 12(¾”) and 16 (1")


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, -H3W, -L4 and -L4W
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. It is compatible with various CNC systems.

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Il faut le voir pour le croire !

Les vitesses et avances deux fois plus élevées donnent des débits copeaux plus importants et permettent de produire plus de pièces en un temps donné.

PrimeTurning™ convient-il à ma production ?

Nous lançons un concept de tournage entièrement nouveau avec une méthode spécifique et de nouveaux outils. Il n'a jamais rien existé de tel auparavant.

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Un bond de géant

La nouvelle méthode de tournage de Sandvik Coromant, PrimeTurning™, a permis à un fabricant indien de pièces pour l'aéronautique d'augmenter sa productivité et de réduire les temps de cycle afin d'honorer une commande importante de pièces faites dans une nuance d'acier difficile à usiner.

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