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CoroBore® 820 XL

Rough boring tool for large diameter boring

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.

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
Step-boringSingle-edge boring

Through hole

Interrupted cuts

Blind hole

ISO application area

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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 codeGradefnFeed range ()apDepth of cut ()vcCutting speed ()
MinMaxRecommendedMinMaxRecommendedMinMaxRecommended
SPMT0606-BR43250.100.250.200.64.52.0365460395
SPMT0606-BM20250.100.150.100.64.51.8260265265
SPMT0606-BR32100.150.300.250.64.52.0285330300
SPMT0606-BM11450.100.150.100.64.51.8152020
SPMT0808-BR43250.150.350.200.86.52.5325425395
SPMT0808-BM20250.100.250.200.86.52.2225265240
SPMT0808-BR32100.200.500.300.86.52.5235315285
SPMT0808-BM11450.100.150.100.86.52.2152020
SPMT1212-BR43250.150.400.251.29.03.0305425365
SPMT1210-BM20250.100.300.201.09.02.5205265240
SPMT1212-BR32100.200.500.301.29.03.0235315285
SPMT1210-BM11450.100.200.151.09.02.5102015
SPMT1812-BR43250.200.400.301.21.03.8305395345
SPMT1810-BM20250.200.300.251.012.03.0205240225
SPMT1812-BR32100.250.500.301.212.03.8235300285
SPMT1810-BM11450.100.200.151.012.03.0102015

Tightening torque

Insert screw

ISOANSINon ISOCodeSizeTorx PlusNmFt/lbs
CC06CC2(1.5)
5513 020-03M2,57IP0.90.7
CC09CC09
5513 020-09M3,515IP3.02.2
CC12CC43
5513 020-17M4x0,515IP3.02.2

SP065513 020-33M2,27IP0.80.59
SP085513 020-57M39IP1.71.25
SP12416.1-833M3,510IP21.48
SP185513 020-25M415IP32.2
SN15SN54
5512 086-03M620IP6.44.7

Product range

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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)
IT9IT9IT9IT9

CoroBore® 111 rough boring inserts for CoroBore® XL

Insert type/sizeEntering angleICGeometryGrade

SPMT 06 06 - Bx

SPMT 09 08 - Bx

SPMT 12 12 - Bx

84°6, 8, 12BR,BM

P 4325

M 2025

K 3210

S 1145

®Click here to go to CoroBore 111 insert assortment

Overview of assembly parts:

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1. Cartridge
2. Slide
3. Adaptor

1. Cartridge
2. Slide
3. Bridge

1. Cartridge
2. Slide
3. Bride extension
4 Bridge

Grades and geometries

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GC4235GC4225GC4215
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GC2035GC2025GC2015
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GC4215GC3215GC3210/GC3205*
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GC1115H10GC1810
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GC1115/H13AGC1105GC1105

*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

Coromant CaptoCoroChuck 930

Shrink fit

adaptor

Collet chuck

adaptor

Torque transmission++++++++++++
Run-out++++++++++++
Balance++++++++++++




Coromant Capto1


Coromant Capto1


Coromant Capto1




123
Cylindrical1


EH
1

Coromant Capto



Coromant Capto1


EH
1






1= First choice







23= 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.
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CoroBore 820
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Coromant Capto basic holders and adaptorsCoroBore 825
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DuoBore

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Fine boring head

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CoroBore XL


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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 versionCoroBore 825 Cylindrical shank
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Slender version
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CoroBore 824 XS EH
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Complementary adaptors

Shrink fit adaptors can be used for accessibility purposes. However, CoroBore 825 with integrated dampening mechanism is preferable if accessibility is required.
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Shrink fit adaptorCoroBore 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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Collet chuck adaptorCoroBore 825 Cylindrical shank
 
 

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