From micro diameter to large drilling – deep hole drilling places the highest demands on precision, process reliability, and cost-effectiveness. With four proven systems, SolidDeep, BrazeDeep, TriDeep, and the modular exchange head drill SUMOGUN, ISCAR offers a tailored solution for almost every application.
Solid carbide single-lip deep hole drills: Highest performance in mass production
Single-lip drills with solid carbide shank (SolidDeep) consist of only two components – clamping sleeve and drill shank – and provide the user with high rigidity. This design allows for feed rates up to 50% higher compared to brazed variants.
Additionally, it reduces the drilling path and ensures high process reliability. The tools are ideally suited for mass production. Typical application areas are drilling diameters up to 6.5 millimeters, and in individual cases, up to twelve millimeters are also possible.
Brazed single-lip deep hole drills: Flexibility for larger diameters
The brazed system (BrazeDeep) consists of three components: clamping sleeve, profile tube made of steel, and a brazed carbide head. Due to their design, these tools are more cost-effective and allow drilling diameters from 2.5 to 40 millimeters and depths up to 4,500 millimeters. After the brazing process, the drill is aligned at the reference pin of the clamping sleeve to minimize runout errors at the drill head. ISCAR offers a comprehensive semi-standard program for these drills, with delivery within three days, as well as a regrinding service.
Single-lip deep hole drill with indexable cutting insert: Maximum cost-effectiveness through a modular system
For applications where the focus is on cost efficiency and flexibility, the modular single-lip deep hole drill (TriDeep) is the first choice. The quick exchange of indexable cutting inserts (TOGT) and guide rails optimizes tool life and simplifies maintenance. The specially ground cutting inserts with wide wiper finishing edge and chip breaker geometry ensure stable processes, prevent built-up edges, and improve chip removal.
With diameters from eight to 32 millimeters, this system is suitable for a wide range of applications. The user benefits not only from the resource-saving and cost-effective design but also from efficient processes. Compared to BrazeDeep, the TriDeep can achieve feed rates that are twice as high.
Surface quality and dimensional accuracy at top level
Single-lip deep hole drills are used on machining centers and sliding head lathes as well as on specialized deep hole drilling machines. While standard machines require a precise pilot hole with H8 tolerance, this can be omitted on machines with drill bushings. Here, the tools demonstrate their strengths: Due to the smoothing effect of the guiding edges, users can achieve surface qualities of up to Ra 0.4 micrometers and tolerances up to IT5 without reworking.
Flexibility is key: SUMOGUN exchange head drill
However, there are also tasks where users cannot progress far with single-lip deep hole drills with brazed carbide heads. Due to the asymmetric cutting edge geometry and limited stability due to the brazing joint between the tube and carbide head, they are significantly limited in terms of feed and cutting speeds. Additionally, the centrally offset cutting edge geometry restricts the coaxiality of the deep hole drilling and the centering capability of the drills.
In series applications with high tool turnover, the often very long tools cause high logistical effort. They must be laboriously packed and shipped for each regrinding.
To address this, ISCAR has included the modular SUMOGUN in its program. The solid material deep hole drill with interchangeable drill heads and clamping sleeves is available in diameters from ten to 25 millimeters. It allows deep drilling up to 400 millimeters as standard and 800 millimeters as a special option. This tool uses a solid steel drill body hardened to 48 HRC. Thanks to this, the tool also performs very well with materials having a tensile strength of more than 1,000 Newtons per square millimeter and can transmit large torsional forces even at high cutting values.
Double modular system
The drill body features two straight clamping grooves for optimal chip removal and has an internal coolant supply that acts directly in the cutting zone. Users benefit from the wide range of drill heads and bodies and the resulting flexibility. The deep hole drills can be equipped with different standard SUMOCHAM drill heads. This allows users to precisely tailor the tools to their requirements and utilize various material-optimized geometries. The drill head can be changed while the drill body is clamped, resulting in virtually no setup times. The clamping sleeve interface is also modular: users can quickly and easily replace it via a threaded interface. The special fine thread and axial flat contact in the interface ensure optimal runout values.
With the two effective cutting edges of the SUMOCHAM drill heads, users can achieve significantly higher feed rates than with a single-lip deep hole drill. The symmetrical cutting edge design supports the quality of the produced deep hole drillings. For productive machining of steel, stainless steel, and cast iron, optimized drill head geometries are available. Some drill heads feature four guiding edges, enabling high surface quality, coaxiality, roundness, and positional accuracy of the hole.
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