Wire knot brush Makita D-39883, 115 mm diameter, replacement accessory for angle grinders

Makita D-39883 is a 115 mm diameter knotted wire brush designed as a replacement accessory for angle grinders. Engineered for metal surface preparation and heavy cleaning, the brush removes rust, paint and scale while cleaning welds and restoring bare metal. Its knotted-wire construction delivers aggressive material removal and durability for industrial and DIY applications.

Advantages

The knotted-wire design provides concentrated cutting action and longer life compared with mixed-bristle brushes. A 115 mm diameter gives a balance between working area and access to confined spaces, while the robust attachment ensures stable performance at typical angle grinder speeds. The brush is suitable for repeated use on metal surfaces and tolerates the mechanical stresses of weld cleaning and heavy rust removal.

Suitable for

• Removing rust and old paint from metal parts
• Cleaning weld seams and weld spatter
• Preparing steel surfaces for painting or coating
• Removing scale and corrosion from pipes and fittings
• Surface roughening before adhesion or bonding

Key specifications

• Brush type: knotted-wire (twisted knot) construction
• Diameter: 115 mm
• Intended tool: angle grinder attachment
• Primary materials removed: rust, paint, scale, weld spatter
• Typical use: surface preparation and heavy cleaning of metal

How to use

Fit the brush to a compatible angle grinder following the tool manufacturer’s instructions, ensuring the grinder is unplugged or its battery is removed during mounting. Securely tighten the mounting flange and check for runout before powering the tool. Operate the grinder at the recommended speed range and use steady, even passes across the workpiece without applying excessive pressure; let the brush do the cutting. Keep the brush perpendicular to the surface when removing rust or paint and angle slightly for weld seam cleaning. Allow the brush to cool periodically during extended use and inspect for wear or damage before each use.

Usage recommendations

Wear appropriate personal protective equipment including eye and face protection, gloves and respiratory protection when working with rust, paint or coatings. Use according to the angle grinder and brush safety guidelines, avoid excessive side pressure, and replace the brush when bristles or knots show significant wear or deformation.