CoroBore Lightweight Large diameter lightweight boring for CoroBore 820 XL, 825 XL and 826 XL

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:

 

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​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

 

​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​ ​ ​

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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​