How to correctly assemble the VARIANT breakthrough system with star cutter

When assembling the VARIANT breakthrough system with star cutter, it is important to consider the required drilling diameter, penetration depth, type of drilled material, and the power of the hammer drill being used. Unlike simpler breakthrough drill bits, this system is assembled from individual components according to the specific application.

The basis of every setup is the VARIANT star cutter, which determines the diameter of the final hole. The working length is then created using conveying augers and extensions.

A major advantage of the system is the possibility to choose different chuck types depending on the machine being used. In addition to SDS-max, other chuck system variants are also available.

When assembling the system, focus mainly on:

• required hole diameter,
• required working length,
• type of drilled material,
• power and chuck type of the hammer drill used,
• and frequency of demanding penetration drilling.

Where and how the VARIANT breakthrough system with star cutter is used in practice

The VARIANT breakthrough system with star cutter is mainly used for demanding construction and installation work where deep penetrations of larger diameters in hard construction materials are required.

Typical applications include:

• penetrations for pipes and waste systems,
• electrical installation and cable routes,
• ventilation systems,
• drilling through thick walls and foundations,
• renovation of older buildings,
• and demanding drilling into concrete, reinforced concrete, or stone.

Thanks to the possibility of assembling different working lengths, the system is also suitable for very deep penetrations where standard breakthrough drill bits are limited by their length or material removal capabilities.

How to work with the VARIANT breakthrough system with star cutter

The VARIANT breakthrough system with star cutter is designed for powerful electro-pneumatic hammer drills. Before drilling, it is important to correctly assemble the individual system components, check the tightness of all connections, and choose the appropriate chuck type for the machine being used.

For deep penetration drilling, we recommend:

• continuously removing drilled material,
• maintaining stable guidance of the assembly,
• avoiding excessive pressure on the hammer drill,
• and using a machine with sufficient performance.

The conveying augers help not only with material removal but also with maintaining the stability of the entire assembly during deep drilling. For longer penetrations, it is important to regularly monitor drill alignment and avoid overloading individual system components.

Which system components can be combined?

In this category, you assemble the VARIANT breakthrough system from individual components according to the required diameter, working length, and hammer drill type.

The system consists of:

• Driling Star VARIANT
  basic drilling components that determine the diameter of the final hole.
• Flute body VARIANT and VARIANT extensions
  used to create the required working length and remove drilled material.
• VARIANT adapters
  allow the system to be used with different chuck types and hammer drills.
• Pilot bits VARIANT for drilling star
  help guide the assembly correctly at the start of drilling.

By combining the individual components, the system can be assembled exactly according to the required drilling diameter, drilling depth, and machine type.

If you are not sure about the correct combination of individual parts, we recommend using the document VARIANT system assembly options, where you will find an overview of typical assemblies by type of work and required length.

Manual – VARIANT

For the actual system assembly (correct tightening of threads, lubrication, checking connecting pins, disassembly procedure after drilling, etc.), use Manual – VARIANT. This document describes the technical procedure for assembly and maintenance so that the system operates safely and with maximum service life.