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Boring large-diameter holes and deep holes requires rigid assemblies, increasing total assembly weight substantially. This creates challenges when it comes to magazine limitations and tool handling.

The new CoroBore® lightweight boring tools reduce tool weight and tool change moment, making handling easier and larger diameters possible.

 

Benefits

  • Reduce your tool assembly weight and moment for easier and more secure tool handling and tool exchange
  • Bore large diameters with increased stability without increase in tool weight
  • Optimized solutions for horizontal boring machines and machining centres

 

Application

ISO application area:
 







 

​Application overview

Three concepts within CoroBore® Lightweight:

  1. Finishing
    1. Coromant Capto® coupling
    2. Diameter 69–167 mm (2.716–6.575 inch)
  2. 2. Finishing
    1. Coromant Capto® coupling
    2. Diameter 150–300 mm (5.905–11.811 inch)
  3. 3. Roughing and finishing
    1. Bridge with face mill interface

     

Long version​ Short version​
Ø 69–167 mm
(2.716–6.575”)​
Ø 150–300 mm
 (5.905–11.811”)​
Ø 150–300 mm
 (5.905–11.811”)​
Finishing
1. Integrated CB825
Long version
Hollow body
Aluminium head​
2. Integrated CB825
Long version
Hollow body
Aluminium head​
3. CB825
Short version
Aluminium bridge & face mill interface​
3. CB820
Long version (with extension)
Aluminium bridge & face mill interface​
3. CB820
Short version
Aluminium bridge & face mill interface​
Roughing​
Machining centres​ ​ Horizontal boring machines with quill​

 

​1. CoroBore 825L, integrated solution
  • Diameter 69–167 (2.716–6.575 inch)
  • Aluminium head and hollow steel body
  • Total assembly length = CB825 fine boring tool + short extension
    100 mm (3.937 inch)
  • Diameter precision adjustment of 2 microns
  • Medium-sized machining centers with possibility to increase cutting data

 

Comparison example:

1. CoroBore 825L, integrated solution: 

CoroBore 825L, diameter 137 mm (5.39 inch), C6 ​
 

 
Massive Lightweight​
Tool assembly​ 825-137TC11-C6
C6-391.01-63 100A​
825L-137TC11-C6
Moment of gravity at the gripper slot, Nm (ft-lbs)​ 4.5 (3.3)​ 2.0 (1.5)​
Weight, kg (lb)​ 5.2 (11.5)​ 2.9 (6.4)​
Savings:
55% reduced tool moment
45% reduced tool weight​ ​ ​
 

 

 

 

 

 

2. Dedicated finishing solution and 3.Combi-solution

 

Finishing​ Roughing​

2. CoroBore 825L XL/826L XL

  • Long version
  • Dedicated fine boring tool with lowest possible tool weight
  • Hollow adaptor with aluminium front

Machining centre with lower tool change capability (HSK100, SK100)

Coromant Capto® modular assembly to optimize the length​

Horizontal boring machine with quill

Assemblies with short gauge line for lowest possible weight​

3. CoroBore 820L XL

  • Long version (with extension)
  • Aluminium bridge with face mill arbor interface​

3. CoroBore 825LXL/826L XL

  • Short version
  • Aluminium bridge with face mill arbor interface

3. CoroBore 820L XL

  • Short version
  • Aluminium bridge with face mill arbor interface​
 ​

Comparison examples:

2. Finishing, long

CoroBore 825L XL, Ø 265 mm (10.43 inch), SK50-C8

 

 
 

 

 

 

Solid Lightweight​
Tool assembly​ 825-265TC11-C8
C6-391.01-80 100A
C8-390.140-50 120
825L-265TC11-C8
C8-390.140-50 120
Tool length, mm (inch)​ 350 (13.779)​ 350 (13.779)​
Moment of gravity at the gripper slot, Nm (ft-lbs)​ 24.88 (18.35)​ 14.57 (10.75)​
Weight, kg (Lb) 16.73 (36.88)​ 12.09 (26.65)​
Savings:
41% reduced tool moment
28% reduced tool weight
​ ​

 

3. Roughing, long

CoroBore 820L XL, Ø 300 mm (11.81 inch), SK50-C8
 
 
 
 
 
 
 
Solid Lightweight​
Tool assembly​ 820-300CN19-C8
C8-391.01-80 100A
C8-390.140-50 120
820L-300CN19
C8-391.05-40 060M
C8-391.01-80 100A
C8-390.140-50 070
Tool length, mm (inch)​ 342 (13.46)​ 332 (13.07)​
Moment of gravity at the gripper slot, Nm (ft-lbs)​ 30.16 (22.25)​ 21.39 (15.78)​
Weight, kg (Lb) 18.73 (41.30)​ 15.45 (34.06)​
Savings:
29% reduced tool moment
18 % reduced tool weight

 

3. Finishing, short

CoroBore 825L XL, Ø 315 mm (10.43), C8
 
 
 
 
 

 
 
Solid Lightweight​
Tool assembly​ 825-315TC11-C8
A1B05-50 40 050
825L-315TC11
A1B05-50 40 050
Tool length, mm (inch)​ 200 (7.87)​ 160(6.30)​
Moment of gravity at the gripper slot, Nm (ft-lbs)​ 8,91 (6.57)​ 3,08(2.27)​
Weight, kg (Lb)​ 12,42 (27.38)​ 8,16(18.0)​
Savings:
34% reduced tool weight
65 % reduced tool moment

 

Product range

Diameter, mm (inch) Insert type, ISO (ANSI)​ Application​ Coupling type​
69-167 (2.72-6.57)​ TC11 (TCMT221)​ Finishing​ C8​
150-315 (5.9-12.4)​ TC11 (TCMT221)​ Finishing​ C8​
150-315 (5.9-12.4)​ CN19, TC22, TC11 (CNMG643, TCMT432, TCMT221)​ Roughing and finishing​ Face mill adaptor 40S​
 ​

 

 
 
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