Aluminum Holder

In the metal brush holder material family, Aluminum Holder is specified, supplied as extruded channel, h, f or custom holder profile, machined bracket and anodized support rail.

Aluminum Holder is used in custom cleaning brushes for replaceable strip seals, cable-entry brushes, guards and conveyor-edge brushes mounted in a stiff light rail.

Compare Aluminum Holder with Stainless holder, PVC holder, flexible polymer backing. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.

Aluminum Holder is rigid; alloy and profile moment of inertia determine support stiffness, which is why Aluminum Holder changes brush stiffness through filament diameter, free trim, density, crimp, and contact. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.

The part people get wrong: rigidity here controls how flat the working face stays under load, not how hard the brush scrubs. Those are two different specifications.

Good for many wet applications with proper alloy and finish.

What this means for your application: aluminium does not swell, so the hole pattern is stable. What water does here is corrode — pitting under the fill and white bloom on the face, both worst where a dissimilar metal is in contact.

A practical check: cycle a sample through the actual wet process and look under the tufts. Corrosion products lifting around the hole, not movement of the hole, is what loosens the fill.

The holder temperature limit depends on aluminum alloy, temper, section thickness, anodizing/finish, fasteners, retained strip backing and mechanical load. Do not use the alloy melting point as the assembly service temperature.

Where it stops working: validate with a sample if the process sits near the top of that band. A permanent bend under load means the answer is a higher-temperature filament family, not a heavier trim.

The usable limit also moves with diameter, trim and contact pressure. A fine filament under light load tolerates more than a thick one under heavy scrubbing.

6000-series examples provide good atmospheric corrosion resistance and anodized; galvanic contact remains a design concern.

The same cleaner can be harmless or destructive depending on how strong it is, how hot it runs and how long it sits. Quote the concentration and the dwell time, not just the product name.

Before you commit to a quantity: Specify the exact Aluminum Holder grade or alloy, filament or profile size, color, straight or crimped form, working temperature, wet or dry use, chemical exposure, surface finish, and any required material documentation.

Filament diameter does not apply to Aluminum Holder. It is a brush component rather than the fill, so it carries no filament of its own and sets no lower diameter limit.

The dimensions that do decide it are the bore or mounting size it has to fit, its wall section or thickness, and the hole pattern that receives the fill. Those come from the machine interface, not from the cleaning task.

If the sample comes back rejected: fix the component dimensions against the equipment first, then choose the fill material and its diameter for the residue you are removing. The two are specified separately.

Replaceable strip seals, cable-entry brushes, guards and conveyor-edge brushes mounted in a stiff light rail.

Where it turns up in practice:

• Door Gap Sealing
• Rail Transit Platform Door & Noise Control Sealing
• Data Center Cabinet Cable Entry Sealing
• Cable Entry Sealing
• Brick, Tile & Building Material Machine Brush Use
• Dust Removal

It is normally set into these constructions:

• Custom Strip Seal Brushes
• Custom Roller and Conveyor Brushes

In practical brush terms: Wrong slot size, weak wall, galvanic corrosion or poorly located fasteners can release or distort the strip.

A usable specification carries the construction, the filament diameter and free trim, the density and contact setting, and the service conditions: wet or dry, temperature, and what the cleaner actually is.

The mistakes that most often send a sample back:

• Selecting Aluminum Holder from the material name alone without setting filament diameter, trim length, and density
• Using dry stiffness to predict wet behavior without checking moisture absorption or liquid exposure
• Ignoring trapped abrasive particles, chemical concentration, temperature, or contact motion when assessing surface risk

Reference standards behind the figures on this page: ISO 2768-1:1989; ISO 2859-1:2026.

Source: Kaiser Aluminum / brush-holder engineering reference — 6061 Technical Data / Aluminum holder design basis. Aluminum alloy properties are grade- and temper-specific. The finished holder assembly, strip backing and fasteners set the usable brush temperature.