82749 - Pferd 5" Combitwist Knot Wire Wheel .020 Carbon Steel 5/8-11 Arbor

Precision Engineering for Heavy-Duty Cleaning

The Pferd 82749 Knot Wheel Combitwist represents the pinnacle of wire brush technology for industrial applications. Designed and manufactured by Pferd, a global leader in abrasive solutions, this 5-inch wire wheel is engineered to deliver aggressive cleaning performance while maintaining exceptional tool life. The core innovation lies in the proprietary COMBITWIST® technology. Unlike standard knot wheels where all knots are twisted in the same direction, the Combitwist design alternates the twist direction of the knots. This seemingly simple engineering adjustment results in a significantly more balanced tool, reducing the vibration transmitted to the operator and the power tool. The result is a smoother operation that allows for more precise control during delicate or strenuous tasks.

Material and Construction

This specific model is populated with high-tensile carbon steel wire with a diameter of 0.020 inches. This heavy gauge wire provides the stiffness and rigidity required for the most demanding surface preparation tasks. It is specifically formulated for use on ferrous metals, making it the ideal choice for working with structural steel, cast iron, and carbon steel piping. The knot construction bundles the wires tightly, concentrating the cutting force at the tips and preventing the wires from flexing too much, which is a common cause of premature wire breakage in crimped brushes. The 5/8-11 threaded arbor is integrated directly into the wheel hub, ensuring a safe, concentric, and secure fit on standard North American angle grinders.

Industrial Applications

The Pferd 82749 is indispensable in industries such as pipeline construction, shipbuilding, and metal fabrication. It excels at removing heavy mill scale, thick rust, paint, and stubborn weld spatter. In welding applications, it is frequently used for inter-pass cleaning to remove slag and silica islands, ensuring the integrity of multi-pass welds. The 5-inch diameter offers a versatile balance between the coverage area of larger wheels and the accessibility of smaller brushes, making it suitable for both open surface cleaning and working into corners or grooves. Operators can rely on this brush for consistent performance from the first use until the wire is worn down, thanks to the structural integrity provided by the Combitwist design.

Safety and Operational Guidelines

As with all high-speed rotational accessories, safety is paramount. This wire wheel should only be used with angle grinders that have a matching speed rating and appropriate guarding. The reduced vibration of the Combitwist design not only improves finish quality but also reduces the risk of Hand-Arm Vibration Syndrome (HAVS) during prolonged use. Users must ensure that the workpiece is compatible with carbon steel to avoid cross-contamination; for stainless steel or aluminum substrates, a stainless steel wire variant should be selected to prevent after-rust.