Mungo 1690023 (MIT-BS-HO Series)

Professional Summary

• Manufacturer: Mungo (Switzerland)

• Model/Article: 1690023 (MIT-BS-HO Series)

• Type: Steel Wire Blow-Out Brush for Drill Hole Cleaning

• Quantity: 1 piece

Technical Specifications

• Compatible Drill Hole Diameters ($d_0$): Specifically sized for 12 mm and 14 mm drill holes.

• Total Brush Length ($L$): 300 mm (extended profile for cleaning deeper anchor embedments)

• Material: Heavy-duty, high-tensile braided steel wire bristles twisted around a rigid steel core rod, completed with an ergonomic manual handling tail.

Key Benefits & Technical Procedure

• Essential for Structural Load Capacity: Drill hole cleaning is a critical, mandatory step in chemical anchoring. Residual concrete dust acts as a bond-breaker; using this brush ensures the resin bonds directly to the structural parent concrete, not loose powder.

• The "Blow-Brush-Blow" Protocol: Designed to satisfy international installation standards (such as the 2x brush, 2x blow approved sequence). Rotational and axial movements scrape fine debris off the borehole walls.

• Wall Roughening Effect: The stiff steel bristles scratch and roughen the internal concrete surface, substantially increasing the mechanical interlock and overall shear/tensile performance of the cured chemical mortar.

• Industrial Durability: Unlike soft nylon alternatives, the industrial steel composition maintains its nominal outer diameter over repeated extractions in abrasive masonry and high-strength concrete.

Application:

Specified for construction job sites to clean $\varnothing 12\text{ mm}$ and $\varnothing 14\text{ mm}$ boreholes in solid concrete, natural stone, or solid brick. Used prior to injecting Mungo MIT chemical mortars for embedding M10/M12 threaded studs or post-installed reinforcement bars.