Double Spiral Abrasive Tube Brush

Double Spiral Abrasive Tube Brushes | High-Density Internal Surface Finishing

Our Double Spiral Abrasive Tube Brushes (also known as 4-wire bore brushes) are engineered for heavy-duty internal cleaning, deburring, and surface conditioning. Unlike standard single-spiral brushes, the double-stem, double-spiral construction provides a significantly more robust framework, allowing for higher filament density and more aggressive cutting action within bores, pipes, and cylinders.

Why the Double Spiral Construction Matters:

• Enhanced Rigidity & Stability: The four-wire (double stem) twist ensures the brush remains perfectly centered during high-speed rotation, preventing "walking" or uneven wear inside the tube.

• 360-Degree Surface Contact: The double-spiral design maximizes filament density, ensuring every square millimeter of the internal diameter is treated uniformly, leaving no "dead zones."

• Aggressive Internal Deburring: Optimized for removing heavy burrs and scale from cross-drilled holes, hydraulic manifolds, and engine blocks where standard brushes might fail.

• Versatile Abrasive Options: Available in Silicon Carbide (for sharp, fast cutting) or Aluminum Oxide (for general-purpose finishing), with a wide range of grit sizes to meet your specific Ra requirements.

Industrial Applications:

• Hydraulics & Pneumatics: Deburring and cleaning critical valve bodies, cylinders, and manifold ports.

• Automotive Engineering: Precision finishing of engine block bores, brake cylinders, and fuel system components.

• Aerospace Maintenance: Removing oxidation and carbon buildup from internal aerospace tubing and turbine components.

• Metal Fabrication: Cleaning and prepping internal threads and long through-holes before assembly.

Refference Drawing:

Standard Series:

Frequently Asked Questions (FAQ)

Q1: What is the benefit of a Double Spiral over a Single Spiral tube brush?

A: A Double Spiral (4-wire) brush is much more durable and rigid. It holds more abrasive filaments, which means it cleans faster and lasts longer. It is the professional choice for power-driven applications, whereas single spiral brushes are often relegated to light manual cleaning.

Q2: Can I use these brushes with a power drill or CNC machine?

A: Absolutely. These brushes are designed for power-driven use. The double-stem construction provides the torque resistance necessary for use with electric drills, air tools, and automated CNC machining centers.

Q3: How do I choose the correct brush diameter for my hole?

A: For effective deburring, the brush diameter should be slightly larger (approx. 5% to 10%) than the hole's internal diameter. This "interference fit" ensures the abrasive tips apply constant pressure against the walls of the bore.

Q4: Will this brush change the dimensions of my precision bore?

A: No. Abrasive nylon filaments are designed to follow the contours of the surface. They will remove burrs and improve surface finish without significantly altering the base dimensions or tolerances of the workpiece.

Q5: What is the best grit for removing oxide layers from aluminum tubes?

A: We generally recommend a Medium Grit (#180 - #240) Silicon Carbide for aluminum. It is aggressive enough to strip the oxide layer but fine enough to leave a smooth, weld-ready surface.