150x1400mm PA66 Paper Machine Roller Brush

A 150x1400mm PA66 paper machine roller brush is a cylindrical rotary cleaning tool built on a stainless steel core with PA66 nylon filament filled around it. The outside diameter of the finished brush is 150 mm, measured across the filament tips, and the filled face length is 1400 mm. One or both ends carry a quick-change coupling that connects the brush to the machine drive and support bearings.

In operation, the brush rotates against a moving forming fabric, press felt, or roll surface. Depending on the cleaning objective, it may rotate with or against the fabric travel direction. The filament tips continuously sweep the surface to loosen pulp fiber, filler, pitch, stickies, and other process deposits before they consolidate. Water showers are typically used in front of or above the brush to wet the contact zone and carry the loosened material away.

This is a wet-end and press-section cleaning component. PA66 filament is selected for its predictable recovery in water and moderate-temperature process conditions. It is not a dryer-section brush and is not intended for baked-on scale, embedded abrasive particles, or heavy metal debris.

Because the face length is 1400 mm, the brush often functions as a module within a wider fabric cleaning system. A narrow machine may need only one brush; a wide machine may combine several units across the sheet width. The quick-change coupling and stainless core support that modular replacement strategy during planned maintenance.

The table lists the standard configuration for this roller brush. Face length, diameter, filament layout, and coupling details can be adjusted to the project during customization.

• Forming fabrics and wire return rolls — removes wet pulp fiber, fines, filler, and light stickies from the wire and return run before they reduce drainage or mark the sheet.
• Press felts and press rolls — sweeps fiber, filler, pitch, and adhesive buildup from felt surfaces and roll covers in combination with felt showers and vacuum systems.
• Doctor zones and sheet edges — collects sticky deposits that accumulate behind doctor blades and along edge trim areas where chemical additives concentrate.
• Couch rolls, guide rolls, and transfer rolls — cleans cylindrical surfaces that carry fiber and coating residues back into the sheet path.

Typical residues handled by this brush include pulp fiber, calcium carbonate and clay filler, pitch, stickies, and light process deposits. The brush is intended for routine preventive contact cleaning, not for removing hardened mineral scale, burned-on coatings, or embedded metal particles.

First, confirm the cleaning width and mounting envelope. Check that the 1400 mm face length covers one cleaning lane or that your layout allows multiple brushes without gaps or excessive overlap. Verify the 150 mm outside diameter against the available space around the roll or fabric run, including shower piping, frame members, and doctor supports. The brush must rotate through its full arc without striking fixed parts.

Next, match the PA66 filament to the deposit and fabric. PA66 is the correct choice for moderate-temperature wet sections where deposits are still soft or lightly consolidated. For light deposits on sensitive fabrics, use a smaller filament diameter and a longer trim for gentler contact. For heavier fiber mats, pitch, or stickies, use a larger filament diameter and a shorter trim for firmer sweeping pressure.

Confirm the coupling interface before ordering. Quick-change couplings are not universal. Pilot diameter, bolt circle, keyway, engagement depth, and torque rating must match the existing drive and support assembly. For legacy installations, provide the machine drawing or a sample end fitting so the core journals can be machined to match rather than adding an adapter.

Set rotation direction and speed only after installation. The brush should sweep deposits off the fabric surface without generating excessive fabric flutter or heat. Position the conditioning shower ahead of or above the contact zone so loosened debris is carried away instead of redeposited downstream.

Choose a different brush when the section runs too hot for PA66, when the deposit is hard mineral scale or embedded abrasive material, or when the fabric cannot tolerate the contact pressure of a rotating brush. For high-temperature dryer fabrics or heavy scale, a PBT, PPS, or metal filament brush is the safer fit. For dry dust and static charges, a fixed brush or vacuum system may be more effective.

This roller brush is normally configured to the specific paper machine rather than ordered as a fixed stock part. Core dimensions, filament layout, and coupling interface are adjusted to the actual installation.

To define the configuration, we need:

• Machine section, fabric or roll type, and machine speed
• Available diameter clearance and mounting envelope around the brush position
• Existing coupling drawing or dimensions: pilot, bolt circle, keyway, and torque rating
• Operating temperature, water chemistry, and shower arrangement
• Deposit description: fiber type, filler, pitch, stickies, or other residues
• Rotation direction and target operating speed

Configurable items include:

• Face length and diameter — the 150 mm diameter and 1400 mm face length can be resized to match the machine width and roll geometry.
• Filament — PA66 diameter, trim length, fill density, and pattern; alternative polymers such as PBT or PPS where process temperature requires.
• Core and journals — AISI 304 or 316 stainless steel, shaft length, bearing seats, keyways, and end details machined to your drawing.
• Coupling — quick-change, keyed, flanged, or a custom interface matched to the existing drive.
• Marking and color — identification bands, part numbers, or section color coding for inventory control.
• Packaging — protective wrapping for shaft journals, individual crating, or multi-unit sets for a machine-width order.

If the project requires material declarations, inspection reports, or third-party testing support, we can assist with those requirements during the customization process.