Tungaloy Corporation has announced the expansion of the HF chipbreaker designed for carburized layer removal in its coated CBN series, which includes the BM05M, BXA10, BXA20 and BR35F grades. The latest expansion introduces the highly wear-resistant BXA10 grade along with additional corner radii options of R1.6 mm and R2.0 mm, broadening the lineup to support more stable machining and extended tool life in heavy-duty cutting applications.
In the automotive sector, carburized layer removal is commonly carried out on transmission components such as gears and shafts. During this process, it is critical to remove the high-hardness carburized layer efficiently while maintaining productivity and machining stability. However, conventional solutions such as the BXA20 grade have faced limitations in wear resistance compared with certain competitive grades, which has sometimes affected tool life during continuous machining.
Additionally, when smaller corner radii such as R1.2 mm or less are used for deep cutting of hardened steel, both outer diameter and face turning operations can place excessive load on the center of the cutting edge, potentially resulting in unstable tool life. With the expanded HF chipbreaker lineup and the introduction of the new BXA10 grade, Tungaloy aims to address these challenges by delivering improved wear resistance, stable machining performance and longer tool life in demanding carburized layer removal operations.
“BM05M, BXA10, BXA20, and BR35F” are CBN-coated insert series optimized for turning hardened steels. They combine excellent wear resistance and fracture toughness, offering outstanding performance across a wide range of applications—from continuous to heavy interrupted cutting. With innovative brazing technology, these grades deliver stable, long tool life and enable highly efficient production.
Benefits and Features
Feature 1: Stable Chip Control in Deep Cutting Operations
– The HF breaker reliably breaks chips even under heavy cutting conditions such as carburized layer removal, preventing chip entanglement.
– Excellent chip evacuation reduces load fluctuations during machining, ensuring stable cutting performance.
– Delivers consistent surface finish quality, minimizing variation in subsequent processes.
Feature 2: Long Tool Life with Highly Wear-Resistant BXA10 Grade
– Exhibits outstanding wear resistance even under high-load conditions such as machining hardened materials or carburized layers.
– Suppresses edge chipping and wear progression, significantly extending tool life.
– Maintains stable dimensional accuracy during long periods of continuous machining.
Feature 3: Wide Range of Machining Capability with Large Corner Radius Options
– Newly added R1.6 and R2.0 mm radii improve tool life stability in external and face turning operations.
– The large corner radius distributes cutting load and enhances edge strength.
