Start recommendations fine boring
Material |
Designation |
Vc m/min (ft/min) |
Ra 0.8 µm (31 µinch) |
Ra 1.6 µm (63 µinch) |
Insert |
ap mm (inch) |
fn mm/rev (in/rev) |
Insert |
ap mm (inch) |
fn mm/rev (in/rev) |
Steel | 46MnVS6 | 180 (591) | TCEX 110302-L-F 1125 | 0.2 (0.008) | 0.25 (0.010) | | | |
TCMT 110304-PF 4325 | 0.4 (0.016) | 0.09 (0.004)
| TCMT 110304-PF 4325 | 0.4 (0.016) | 0.13 (0.005) |
Super Duplex | F55 | 130 (427) | TCMT 110304-MF 1125 | 0.4 (0.016) | 0.07 (0.003) | TCMT 110304-MF 1125 | 0.4 (0.016) | 0.13 (0.005) |
Titanium | Ti6AI4V | 50 (164) | TCGX 110204-ALH10 | 0.4 (0.016) | 0.10 (0.004) | TCGX 110204-ALH10 | 0.4 (0.016) | 0.13 (0.005) |
Aluminium | ALAS9U3Y40 | 270 (886) | TCGX 110204-ALH10 | 0.4 (0.016) | 0.09 (0.004) | TCGX 110204-ALH10 | 0.4 (0.016) | 0.13 (0.005) |
Cast iron | K3.2.C.UT | 225 (738) | TCMT 110304-PF 4325 | 0.4 (0.016) | 0.03 (0.001) | TCMT 110304-PF 4325 | 0.4 (0.016) | 0.13 (0.005) |
Tool holding
Bending stiffness and torque transmissions are the most important factors when choosing a tool holder for boring operations. For best stability and hole quality use Coromant Capto or the Coromant EH system.
Coromant Capto coupling is the only modular tooling system designed for all metal cutting operations, including all hole making methods. The same cutting tools and adaptors can be used in different applications and machines. This makes it possible to standardize on one tooling system for the entire workshop. Remember the following:
- Choose shortest possible adaptor
- Choose strongest possible adaptor
- If reduction is needed, use tapered version if possible
- For long overhangs (>4 x DCON), use dampened adaptors
- For long overhangs, ensure rigid clamping with flange contact to spindle if possible
The Coromant EH system delivers great tooling flexibility – choose from an extensive variety of heads, adaptors and shanks.
- Reduced tool inventory with standardized tools minimizing machine downtime
- For boring operations requiring long reach, as in large machining centres in the diameter range of 1–36 mm (0.039–1.42 inch). Deep pockets is a typical application where the Coromant EH system offers the required reach without limiting process security
Choice of adaptors/chucks for boring
Choose coupling/chuck first, then adaptors/chucks |
Coromant Capto |
CoroChuck 930 |
Shrink fit
adaptor |
Collet chuck
adaptor |
---|
+++ Very good |
Torque transmission |
+++ |
+++ |
+++ |
+++ |
---|
++ Good |
Run-out |
+++ |
+++ |
+++ |
+++ |
---|
+ OK |
Balance |
+++ |
+++ |
+++ |
+++ |
---|
Boring tool couplings |
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|
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CoroBore 820 |
Coromant Capto |
1 |
|
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|
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DuoBore |
Coromant Capto |
1 |
|
|
|
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CoroBore XL |
Coromant Capto |
1 |
|
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|
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CoroBore 825 |
|
|
1 |
2 |
3 |
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|
Cylindrical |
1 |
|
|
|
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| EH | | 1 | | |
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Fine boring head 391.37A/B |
Coromant Capto |
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|
|
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CoroBore 824 XS | Coromant Capto | 1 | | | |
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CoroBore 824 XS | EH | | 1 | |
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| | | | | |
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|
1 |
= First choice |
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2 |
3 |
= Complementary choice |
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Coromant Capto® system - first choice
CoroChuck™ 930 – first choice for boring tools with cylindrical shanks.
CoroChuck 930 precision chucks have a very good run-out precision and high torque transmission thanks to the latest Fulcrum technology. This technology delivers the best pull-out security on the market.
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HD version |
CoroBore 825 Cylindrical shank |
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Slender version | |
| |
Complementary adaptors
Shrink fit adaptors can be used for accessibility purposes. However, CoroBore 825 with integrated dampening mechanism is preferable if accessibility is required. |
| |
|
Shrink fit adaptor |
CoroBore 825 Cylindrical shank |
Collet chucks can be used together with CoroBore 825 cylindrical shanks. However, it is not the optimal solution due to lower clamping forces and larger run-out compared to HydroGrip. Furthermore, it is not individually balanced. |
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|
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Collet chuck adaptor |
CoroBore 825 Cylindrical shank |