HORN Introduces Type 117 Inserts for Small-Diameter Slot Broaching!
Paul Horn GmbH has expanded its slot broaching system with the introduction of new Type 117 inserts, designed for internal diameters starting at 9 mm. The development targets manufacturers requiring precision slotting solutions for small-diameter applications while improving cost efficiency and tool performance.
The Type 117 insert family has been engineered using a newly developed carbide blank specifically tailored to this system. By optimizing the insert design and reducing carbide consumption, HORN has lowered the cost per cutting edge without compromising durability. The reduced material usage contributes to improved economic efficiency, particularly in high-volume broaching operations.
The slot broaching system is suitable for producing gears, polygonal profiles and keyways. Unlike traditional solid carbide broaching tools, the modular system allows for longer and deeper grooves through the use of dedicated tool shanks. This design enhances flexibility and expands the range of applications, especially in internal broaching tasks where reach and stability are critical.
Tool lengths are available in 20 mm, 30 mm and 40 mm configurations, enabling adaptation to different groove depths and machining requirements. Internal coolant delivery directs coolant precisely to the cutting zone, improving chip evacuation, temperature control and overall process stability. Tool holder shank diameters are offered in 16 mm and 20 mm, and HORN provides holders compatible with broaching units from multiple manufacturers, supporting integration into existing production setups.
Standard inserts are available in multiple configurations to address varying profile requirements and workpiece materials. This versatility enables manufacturers to tailor the system to specific gear or keyway geometries without extensive custom tooling.
In customer testing, the new system demonstrated significant improvements in tool life. In one case, tool life increased from 120 to 1,040 pieces when broaching a serration in hardened steel, while maintaining identical cutting parameters. In addition to the extended service life, the lower carbide content reduced cost per cutting edge compared with previously used inserts.
With the introduction of the Type 117 inserts, HORN strengthens its slot broaching portfolio, offering a solution optimized for small internal diameters, improved tool longevity and enhanced cost efficiency in precision broaching applications.
