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CoroBore® XL is the boring tool system for large diameter boring. The bridges and holders enable rough boring to be completed with high productivity. The system gives a more rigid and reliable performance in larger bores, and is designed to generate the required hole quality and diameter. 

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Benefits

  • Reliable system with rigid interfaces between head and cartridge for stable and vibration-free boring
  • Dedicated cartridges designed for highest stability
  • Dedicated tool holders optimized for large diameter boring
  • Also available as lightweight tools: CoroBore lightweight boring tools reduce tool weight and tool change moment, making handling easier and larger diameters possible
  • Available as damped tools, 820D (Silent Tools), for productive boring even at long overhangs

 

Features

  • CoroBore® 111 four-edged standard inserts with optimized grade selection for rough boring applications
  • Large standard assortment of CoroTurn 107 and T-Max P inserts
  • Axially and radially adjustable cartridges giving reduced inventory costs
  • Made of high strength aluminium, which reduces assembly weight
  • Hard coated for surface protection Rigid interfaces between all assembly items which maximizes stability and reliability
  • Cutting fluid through the tool

 

Application

  • Dedicated geometries and grades for all materials
  •  Large components, such as casings, housings, gear boxes, frames etc.
  • Round insert carriers are a productive solution for machining in cladded materials, e.g. boring of Inconel 625 weld in oil and gas applications
Twin-edge boring​ Step-boring​ Single-edge boring

 

Counterbore Through hole Interrupted cuts Blind hole
 
ISO application area
 
 
 ​​

Recommendations

  • ​Choose CoroBore 111, optimized for rough boring applications
    • KAPR 90° for counterbore operations. Excellent insert for heavy machining and unstable conditions. Recommended depth of cut 15 mm (0.590 inch)
    • KAPR 84° for complex materials such as cladded Inconel
  • Choose CoroTurn 107 for general applications, with a wide selection of geometries and grades
  • ​Choose T-Max P for tough applications that require strong inserts and improved process security.
  • Step boring is an effective way to increase the depth of cut without excessive vibrations



 

Cutting data

General recommendations rough boring:

  • Starting data: vc 200 m/min (valid when vc on insert box is bigger than vc 200 m/min) at short overhang. Check insert box for feed and depth of cut recommendations
  • vc = 50% of recommended data on label. If vibrations occur, reduce speed and increase feed. Do not use max recommended feed and ap at the same time.

Cutting data: CoroBore® 111

Order code Grade Feed range (fn) Depth of cut (ap) Cutting speed (vc)
Min Max Recommended Min Max Recommended Min Max Recommended
SPMT0606-BR 4325 0.10 0.25 0.20 0.6 4.5 2.0 365 460 395
SPMT0606-BM 2025 0.10 0.15 0.10 0.6 4.5 1.8 260 265 265
SPMT0606-BR 3210 0.15 0.30 0.25 0.6 4.5 2.0 285 330 300
SPMT0606-BM 1145 0.10 0.15 0.10 0.6 4.5 1.8 15 20 20
SPMT0808-BR 4325 0.15 0.35 0.20 0.8 6.5 2.5 325 425 395
SPMT0808-BM 2025 0.10 0.25 0.20 0.8 6.5 2.2 225 265 240
SPMT0808-BR 3210 0.20 0.50 0.30 0.8 6.5 2.5 235 315 285
SPMT0808-BM 1145 0.10 0.15 0.10 0.8 6.5 2.2 15 20 20
SPMT1212-BR 4325 0.15 0.40 0.25 1.2 9.0 3.0 305 425 365
SPMT1210-BM 2025 0.10 0.30 0.20 1.0 9.0 2.5 205 265 240
SPMT1212-BR 3210 0.20 0.50 0.30 1.2 9.0 3.0 235 315 285
SPMT1210-BM 1145 0.10 0.20 0.15 1.0 9.0 2.5 10 20 15
SPMT1812-BR 4325 0.20 0.40 0.30 1.2 1.0 3.8 305 395 345
SPMT1810-BM 2025 0.20 0.30 0.25 1.0 12.0 3.0 205 240 225
SPMT1812-BR 3210 0.25 0.50 0.30 1.2 12.0 3.8 235 300 285
SPMT1810-BM 1145 0.10 0.20 0.15 1.0 12.0 3.0 10 20 15

Tightening torque

Insert screw

ISO ANSI Non ISO Code Size Torx Plus Nm Ft/lbs
CC06 CC2(1.5)   5513 020-03 M2,5 7IP 0.9 0.7
CC09 CC09   5513 020-09 M3,5 15IP 3.0 2.2
CC12 CC43   5513 020-17 M4x0,5 15IP 3.0 2.2
  SP06 5513 020-33 M2,2 7IP 0.8  0.59
SP08 5513 020-57 M3 9IP 1.7  1.25
SP12 416.1-833 M3,5 10IP 2 1.48 
SP18 5513 020-25 M4 15IP 3 2.2
SN15 SN54   5512 086-03 M6 20IP 6.4 4.7

​Product range

 
 
Boring range mm (inch)150-300
(5.905-11.811)​
148–300 mm
(5.827–11.811 inch)​
​298-540 
(11.732-21.260)
​538-1260
(21.181-49.606)
​Hole toleranceIT9​​IT9 ​IT9 ​IT9

CoroBore® 111 rough boring inserts for CoroBore®​ XL

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


Overview of assembly parts:
 
CoroBore 820 XL,
dia 150-300 mm
(5.905-11.811 inch)​
CoroBore 820 XL,
dia 298-540 mm
(11.732-21.260 inch)​
CoroBore 820 XL,
dia 538-1260 mm 
(21.181-49.606 inch)​
1. Cartridge
2. Slide
3. Adaptor​
1. Cartridge
2. Slide
3. Bridge​
1. Cartridge
2. Slide
3. Bride extension
4 Bridge​
 
Grades and geometries​
 
Application Toughness First choice Wear resistance
Roughing GC4235 GC4225​ GC4215​
GC2035 GC2025 GC2015
GC4215 GC3215 GC3210/GC3205*
GC1115 H10 GC1810
GC1115/H13A GC1105 GC1105

*GC3210 Nodular cast iron, GC3205 Gray cast iron
Cutting data recommendations, see main catalogue.

​Tool holding

From diameter 148-300 mm (5.827-11.811 inch), CoroBore XL has integraded adaptors with Coromant Capto back-end coupling. For diameter 298-1260 mm (11.732-49.606 inch), the CoroBore XL holders are developed with a unique tool side interface, optimized for large diameter boring. The holders have a large support area which generates stability and takes up axial forces with large flat driving keys to take up the high torque.

Internal coolant both centre and flange. Possibility to rotate driving keys and bridge by 90 degrees. 

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 
 
​ ​ Adaptor and chuck systems​
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​ ​
CoroBore 820​ Coromant Capto​ 1​
DuoBore​ Coromant Capto​ 1​
CoroBore XL​ Coromant Capto​ 1​
CoroBore 825​ 1​ 2​ 3​
Cylindrical​ 1​
EH​ 1​
Fine boring head 391.37A/B​ Coromant Capto
CoroBore 824 XS​ Coromant Capto​ 1​
CoroBore 824 XS​ EH​ 1​
1 ​ = First choice​
2​ 3​ = Complementary choice​

 

Coromant Capto® system - first choice

 

First choice should always be tools with Coromant Capto coupling, which offers excellent repeatability and the best stability characteristics on the market. ​
CoroBore 820​
Coromant Capto basic holders and adaptors​ CoroBore 825​
DuoBore​
Fine boring head​
CoroBore XL

 

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.​ ​
HD version​ CoroBore 825 Cylindrical shank​
Slender version
CoroBore 824 XS EH
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. ​
Collet chuck adaptor​ CoroBore 825 Cylindrical shank​​
 
 
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