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CoroBore® BR30

Differential pitch

​The differential pitch reduces vibration tendencies so that the tools can be used at longer overhangs and larger depth of cuts.

Highly productive boring

​Three cutting edges for superior productivity. The short and rigid tool assembly provides high stability and rigidity.

Step boring functionality

​Additional shims available for step boring with CoroBore® BR30.

View More Features
​Laser-marked scale

Laser-marked scale on adapter for increased user-friendliness when setting diameter.

Coromant Capto®

Modularity with Coromant Capto®.

Find your tool and buy

Application area

  • Rough boring
  • Multi-edge boring, step boring
  • Standard inserts with optimized grades and geometries for all materials
    • CoroBore® 111: Optimized for rough boring applications
    • CoroTurn® 107: Wide selection of grades and geometries
  • Steel
  • Stainless steel
  • Cast iron
  • Non-ferrous metals
  • Heat resistant super alloys
  • Hardened materials

Product range

Multi-edge boring

Very productive multi-edge tool, available with three to eight cutting edges for maximum metal removal rate. Short and rigid tool assembly provides high stability and rigidity.

CoroBore® 111 inserts

​Four-edged standard inserts with optimized grade selection. The unique solution offers excellent chip breaking and increased lifetime in ISO P, M, K and S materials.

CoroBore® BR30: three cutting edges

Size DCN
Insert 90° Insert 84° Machine coupling
A3540.5CC06SP06C3, C4
39.545CC06SP06C3, C4
B4450.5CC06SP06C4, C5
49.556CC06, CC09SP08C4, C5
C5563CC09SP08C5, C6
6270CC09, CC12SP12C5, C6
D6978.5CC12SP12C5, C6
77.587CC12SP12C5, C6
E8697CC12SP12C6, C8
96107CC12SP12C6, C8
F106122CC12SP12, SN12C8
121137CC12SP12, SN12C8
G136152CC12SP12, SN12C8
151167CC12SP12, SN12C8
H167191CC12, CN16SP12, SN15C8
189214CC12, CN16SP12, SN15C8

Assortment is available as complete assembly kits and as separate items

CoroBore® BR30: four to eight cutting edges

Size DCN
# CE Insert 84° Machine coupling
D 85.0 94.5 4 SP12 C6
D 93.5 103.0 C6
D 102.0 111.5 6 C8
D 110.5 120.0 C8
D 119.0 128.5 8 C8
D 127.5 137.0 C8
D 136.0 145.5 8 C8
D 144.5 154.0 C8
D 153.0 162.5 6 C8
D 161.5 171.0 C8
D 170.0 179.5 6 C8
D 178.5 188.0 C8
D 187.0 196.5 6 C8
D 195.5 205.0 C8

CoroBore® 111 rough boring inserts for CoroBore® BR30

Insert type/size Entering angle IC Geometry Grade

SPMT 06 06 – Bx

SPMT 09 08 – Bx

SPMT 12 12 – Bx


6, 8, 12


P 4325

M 2025

K 3210

S 1145

Click here to view CoroBore® 111 insert assortment

Positioning of rough boring tools

Tool Solution Technical features  
Differential pitch CoroBore® 111inserts High-precision coolant Flexible diameter range Back boring Laser-marked scale on adapter Long overhang Stepboring Modular Coromant Capto® Coromant EH
CoroBore® BR10 Back boring     ​  
CoroBore® BR20 Flexible boring tools  
CoroBore® BR20 Silent Tools™ Boring with long overhang ✔*✔​ 
CoroBore® BR30 High metal removal rate (3 to 8 cutting edges)      

*Step boring possible with kappa 90°


Back boring with CoroBore® BR10

The CoroBore® BR10 back boring tool is based on the CoroBore® BR20 adapter, together with a unique back boring slide and cover.

CoroBore® BR20 twin-edge boring tool for flexible boring

CoroBore® BR20 is a twin-edge, multi-purpose tool for rough boring. The system consists of adapters with matching slides, shims, and covers, making it possible to adapt the tool to various materials and conditions.

Next generation rough boring tools

The new generation of CoroBore® rough boring tools provides you high-end productivity in all your rough boring operations.

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