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Weiler 94752 twisted knot wire wheel brush 4-1/2 inch diameter 0.020 inch wire carbon steel threaded arbor

Weiler

Weiler 94752 Root Pas Wire Brush Arbor 4-1/2" 0.020

SKU CH-07BR-HNCPD

Wire wheel brush with 0.020" carbon-steel knots for 4-1/2" angle grinders up to 15,000 RPM

  • Cleans weld roots with stringer bead twist knots
  • 4-1/2 inch diameter fits angle grinders
  • 020 inch carbon steel bristles for aggressive action
  • 5/8-11 threaded arbor mounts directly
  • Rated for 15,000 RPM maximum speed

Root Pas Wire Brush for Carbon Steel

The Weiler 94752 is a 4-1/2 inch wire wheel brush designed for angle grinders. It features a stringer bead twist knot construction with carbon steel bristles measuring 0.020 inch in diameter. The brush connects via a 5/8 inch-11 threaded hole for direct mounting on compatible tools. It targets metalworkers cleaning welds or removing scale on carbon steel surfaces.

Sustained Operation at Maximum Speed

Rated for a maximum operating speed of 15,000 RPM, the twist knot design maintains aggression during extended grinding sessions. The 13/16 inch bristle length and 3/16 inch face width provide consistent contact without excessive flex under load. Carbon steel bristles resist work hardening when used on matching base material, reducing wire breakage over time. Heat buildup in the hub remains manageable within the rated speed envelope.

Threaded Arbor Installation and Common Issues

Installation requires matching the 5/8 inch-11 threaded hole to the grinder spindle; cross-threading damages the brush hub. Users must verify the tool reaches 15,000 RPM no-load speed before mounting. Exceeding the maximum RPM causes wire shedding and potential injury. The brush is not suited for stainless steel or non-ferrous metals due to carbon contamination risk. No shank adapter is included for alternative tool fitment.

Highlights

  • Cleans weld roots with stringer bead twist knots
  • 4-1/2 inch diameter fits angle grinders
  • 020 inch carbon steel bristles for aggressive action
  • 5/8-11 threaded arbor mounts directly
  • Rated for 15,000 RPM maximum speed

Specifications

BrandWEILER

Questions about this item

How much heat or noise does the 4-1/2" carbon-steel wire wheel generate when run continuously at 15,000 RPM on an angle grinder?

The brush itself has no motor, so it produces no electrical heat or fan noise; only the grinder's motor and the friction of the 0.020" carbon-steel knots against the workpiece create heat and sound.

What must I already own to mount and safely operate this 5/8"-11 threaded-hole wire wheel?

You need an angle grinder with a 5/8"-11 spindle, a matching flange nut, and appropriate personal protective equipment such as safety glasses and gloves.

Will this 4-1/2" diameter, 3/16" face-width wheel clear the guard and spindle on my older 4-1/2" angle grinder?

Yes, the 4-1/2" brush diameter and 5/8"-11 thread match standard 4-1/2" grinders, and the 3/16" face width fits within typical guard clearances.

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