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CoroMill® 331

Multi-purpose side and face milling cutter

High-precision capability for numerous operations

High quality surfaces, excellent metal removal rates and true 90° corners make this cutter the most productive of its kind.

Adjustable, spring-loaded cassettes with serrations

​Adjustable cassettes enable you to set the cutter with high accuracy for precise groove dimensions. The cutter also features spring-loaded cassettes with serrations for security and easy precision setting for desired width.

Wide range of tools for great flexibility

Large assortment covering an extensive choice of diameters, widths, insert geometries, corner radii and grades, offering flexibility in numerous face-, shoulder-, and side and face milling operations.

View more features
  • ​Round insert options and a vast assortment of corner radii available as standard
  • Inserts with eight edges for face milling operations
  • Grade GC1130 inserts with Zertivo™ technology for long and predictable tool life
  • Available with fixed pocket design with extra high teeth density
  • Wide range of mounting options. Wide grooves can be produced by several CoroMill 331 cutters mounted together in a gang

Find your tool and buy

Application area

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  • Grooving
  • Parting off
  • Double half side milling
  • Shoulder milling
  • Face milling
  • Back face milling
  • Gang milling
  • Circular interpolation
  • Steel
  • Stainless steel
  • Cast iron
  • Non-ferrous metals
  • Heat resistant super alloys
  • Hardened materials

Tool description

Half side

CDX ≤ 114.5 mm
CDX ≤ 4.311 inch

ap ≤ 10.6 mm
ap ≤ 0.417 inch

Double half side

CDX ≤ 114.5 mm
CDX ≤ 4.311 inch

ap ≤ 27.2–33.8 mm
ap ≤ 1.071–1.331 inch

Full slot with radius

CDX ≤ 114.5 mm
CDX ≤ 4.311 inch

ap ≤ 6–26.5 mm
ap ≤ 0.236–1.043 inch

Full radius

CDX ≤ 114.5 mm
CDX ≤ 4.311 inch

ap ≤ 10–16 mm
ap ≤ 0.375–0.629 inch

Full slot fixed pocket

CDX ≤ 34.0 mm
CDX ≤ 0.850 inch

ap ≤ 6–10 mm
ap ≤ 0.250-0.500 inch

Full slot cassette

CDX ≤ 114.5 mm
CDX ≤ 4.311 inch

ap ≤ 6–26.5 mm
ap ≤ 0.236–1.043 inch


Cutters and available inserts

Cutter bodies Insert size Neutral inserts Right and left hand inserts
Groove width range Cutter versions
(end of code)
Radius (RE)
0.5 mm
0.020 inch
Radius (RE)
0.8 mm
0.031 inch
Radius (RE)
1.52 mm
0.060 inch
Radius (RE)
2.29 mm
0.090 inch
Radius (RE)
3.05 mm
0.120 inch
Radius (RE)
4.83 mm
0.190 inch
Radius (RE)
6.35 mm
0.250 inch
mm inch
6–8 0.236–0.315 CM 04
8–10 0.315–0.394 DM 05
10–12 0.394–0.472 EM 06
12–15 0.472–0.591 FM 08
15–17.5 0.591–0.689 KM 11
17.5–20.5 0.689–0.807 LM 11
20.5–23.5 0.807–0.925 QM 14
23.5–26.5 0.925–1.043 RM 14

Accuracy

Run-out over master inserts

Fixed pockets

Radial run-out: 0.04 mm (0.0016 inch)
Axial run-out: 0.03 mm (0.0012 inch)

Adjustable pockets

Radial run-out: 0.02 mm (0. 0008 inch)
Axial run-out: 0.02 mm (0.0008 inch)

Highlights

Aerospace frame

The flap track is located in the trailing edge mechanism of the aerospace frame and requires a number of challenging operations.

Steel milling grade GC1130 Zertivo™ – process control at a higher level

Produced with Zertivo™, a unique PVD production technology, GC1130 increases the predictability and security of your milling process.

Side and face milling checklist

Make the most out of your slot milling operations by applying these useful hints.

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