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DuoBore™ 821 is a versatile rough boring tool that can be used in three different operation types: multi edge- , step- and single edge boring. The slides can be adjusted individually, both axially and radially. The system consists of adaptors with matching slides, shims and covers, making it possible to adapt the tool to various materials and conditions.
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Available as dampened tools, 821D (Silent Tools), for productive boring even at long overhangs
A new generation of rough boring tools is available. For our latest boring solutions within the same application area as DuoBore, see CoroBore BR20 and CoroBore BR10 (back boring).
1. Slides2. Adaptor
1. Slides2. Dampened adaptor
Positive inserts
CoroTurn 107 screw clamping
T-Max P, CoroTurn RC rigid clamping
*H13A for Ti-based ISO S-materials** For recommendation on fine boring in ISO H material, see technical guide, General turning.Note: Grade recommendations are valid for average conditionsFor recommendations on when an alternative grade should be used, se below:
*GC3210 Nodular cast iron, GC3205 Gray cast ironFor recommendation on fine boring in ISO H material, see technical guide, General turning.Cutting data recommendations, see main catalogue.
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:
The Coromant EH system delivers great tooling flexibility – choose from an extensive variety of heads, adaptors and shanks.
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