CoroBore® BR20
Twin-edge rough boring tools for flexible boring
Differential pitch
The differential pitch reduces vibration tendencies so that the tools can be used at longer overhangs and larger depth of cuts (example picture).
Back boring capability
Possibility to easily be assembled as a back boring tool, using a unique slide and cover.
Step boring functionality
Built-in step boring functionality without any additional need of an extra shim.
Application area
- Rough boring
- Twin-edge boring, step boring and back boring
- Damped Silent Tools™ solution for vibration-sensitive applications
- Standard inserts with optimized grades and geometries for all materials CoroBore® 111: Optimized for rough boring applicationsCoroTurn® 107: Wide selection of grades and geometries
Product range
CoroBore® BR20 twin-edge boring
Twin-edge multi-purpose rough boring. The system consists of adaptors with matching slides, shims and covers, making it possible to adapt the tool to various materials and conditions.
CoroBore® BR20 with Silent Tools™ technology
Perfect problem-solver when working with long overhangs. When using Silent Tools™, you have the opportunity to double the depth of cut, while maintaining productive boring.
CoroBore® 111 inserts
Four-edged standard inserts with optimized grade selection, designed for rough boring. The unique solution offers excellent chip breaking and increased lifetime in ISO P, M, K and S materials.
CoroBore® BR20: Twin-edge boring
| Size | DCN | DCX | Insert 90° | Insert 84° | Machine coupling |
| A | 23 | 29 | CC06 | SP06 | EH20, C3 |
| B | 28 | 36 | CC06 | SP06 | EH25, C3 |
| C | 35 | 45 | CC09 | SP08 | C3, C4 |
| D | 44 | 56 | CC09 | SP08 | C4, C5 |
| E | 55 | 71 | CC12 | SP12 | C5, C6 |
| F | 70 | 90 | CC12 | SP12 | C5, C6 |
| G | 89 | 116 | CC12 | SP12 | C6, C8 |
| H | 115 | 150 | CC12 | SP12 | C6, C8 |
CoroBore® BR20 with Silent Tools™ technology
| Size | DCN | DCX | Insert 90° | Machine coupling |
| A | 23 | 29 | CC06 | C4 |
| B | 28 | 36 | CC06 | C3 |
| C | 35 | 45 | CC09 | C3,C4,C6 |
| D | 44 | 56 | CC09 | C4,C5,C6 |
| E | 55 | 71 | CC12 | C5,C6 |
| F | 70 | 90 | CC12 | C6,C8 |
| G | 89 | 116 | CC12 | C8 |
| H | 115 | 150 | CC12 | C8 |
Assortment is available as complete assembly kits and as separate items
CoroBore® 111 rough boring inserts for CoroBore® BR20
| Insert type/size | Entering angle | IC | Geometry | Grade |
SPMT 06 06 - Bx SPMT 09 08 - Bx SPMT 12 12 - Bx | 84° | 6, 8, 12 | BR,BM | P 4325 M 2025 K 3210 S 1145 |
Click here to go to CoroBore® 111 insert assortment
Positioning of rough boring tools
| Tool | Solution | Technical features | Technical features | Technical features | Technical features | Technical features | Technical features | Technical features | Technical features | Technical features | Technical features |
| Differential pitch | CoroBore® 111 inserts | High Precision Coolant | Flexible diameter range | Back boring | Laser-marked scale on adaptor | 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 cutting edges) | ✔ | ✔ | ✔ | ✔ | ✔ |
*Step boring possible with kappa 90°
Highlights
Back boring with CoroBore® BR10
The CoroBore® BR10 back boring tool is based on the CoroBore® BR20 adaptor together with a unique back boring slide and cover.
CoroBore® BR30 multi-edge boring tool
When maximum productivity is in focus, choose the highly productive stable multi-edge (3 to 8 cutting edges) CoroBore® BR30. Optimized solutions for cavity boring in Inconel available.
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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Sandvik Coromant UK
+44 (0)121 368 0305