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2026-01-28Technical brushes are the fastest way to remove rust, old paint, tarnish and burrs from metal, but also to satin-finish and prepare surfaces for painting. How to get the optimal efficiency of their use? First of all - remember to choose the right type of wire (twisted/carbonized/INOX/brassed), the right mounting (M14, 6 mm shank, 20/32 mm hole) and a balanced working technique. Below we have collected practical tips for DIY and amateur users to help achieve the desired results.
Wire type vs. application
Twisted wire
- Stiff as well as aggressive; helps quickly get rid of thick rust, scale, multilayer paint.
- It leaves a clearer mark on the material - ideal for large steel surfaces and preparation for further processing.
Crimped wire
- More flexible, works smoother and more precisely; to be refined on edges, profiles and with thinner coatings.
- Brass - the gentlest; steel/INOX - offers more intensive cleaning.
INOX for stainless steel
- A separate, uncontaminated brush for stainless steel. Prevents surface contamination with black steel and subsequent corrosion stains.
Nylon
- When dealing with delicate surfaces and care about the absence of sparks: for light dirt, deburring, polishing wood and wood-based materials.
Brush shape vs. type of work
- Bottom (cup) - large planes, fast collection.
- Disc - for edges, corners, side work on profiles.
- Brush-point, in grooves, embossing, on welds.
Attachment and selection to the tool
- Angle grinder: M14 thread (EU standard). Check the max RPM from the brush technical data.
- Drill / screwdriver: shank 6 mm (butt, disc, brush) - for smaller areas and precision work.
- Bench grinder: 20mm or 32mm bore; usually comes with reduction bushings - match the spindle.
Work technique - basic principles
- Angle of application: disc-shaped ~10-15°, cup-shaped flat.
- Pressure: light/medium - the wire is supposed to "brush", not throttle the rotation.
- RPM: do not exceed the brush limit; often lower RPMs mean better control and durability of the accessory.
- INOX and aluminum: dedicated INOX brush only (separately labeled and stored).
- Spark-sensitive areas: consider nylon brushes.
Most common mistakes → quick fix
- Spreads but doesn't clean → too mild wire/shape: replace corrugated brush with twist brush or switch from brush to larger diameter cup/disc; degrease surface.
- Vibration and plucked wires → too much RPM/pressure or too loose attachment. Take off the RPM, tighten the M14/pin and work with an even feed (always within the max RPM of the brush).
- "Flecks" of corrosion after stainless → used steel or "mixed" brush. INOX to INOX, separate markings.
Health and safety and quality of finish
- Protection: goggles, gloves, dust mask; the wires are sharp so it is easy to cut yourself with them.
- Stabilize the workpiece: clamps/vise; never hold workpieces in your hands.
- Control sample: with decorative elements, start working outside the field of view, choose the wire and angle, and only then work on the actual element.
- Maintenance: remove dust and filings from the brush, check for cracks/splits - do not use damaged accessories.
Quick selection download
|
Task |
Best choice |
|
Thick rust, multi-layer paint |
Twisted wire, cup on M14, medium RPM |
|
Precision edge cleaning |
Notched disc, smaller diameter, controlled pressure |
|
Welds/Point |
Brush (twisted for heavier work) |
|
Stainless steel/aluminium |
INOX (separate brush), low RPM |
|
No sparks, fine finish |
Nylon |
Where to buy
Go to the categories on fixero.com: cup and disc wire brushes, brush for 6 mm mandrel, INOX brushes, etc. Choose the type of wire, shape and attachment for your power tool and task. For more advice and tips on accessories, visit our GTX Academy.
