Supergrit Abrasives

4" X 5/8" - 11 IMPORT (PFERD) KNOTTED CUP .020 or .014 Max RPM 9,000

4" X 5/8" - 11 IMPORT (PFERD) KNOTTED CUP .020 or .014 Max RPM 9,000 - Main image
$6.39 $9 In stock

This 4-inch knotted cup brush is designed for aggressive cleaning and surface preparation. It features a 5/8-11 threaded hub for easy mounting on compatible angle grinders. The brush is available in wire thickness options of .020 or .014, allowing you to choose the aggressiveness that suits your application. With a maximum RPM rating of 9,000, it is built to handle demanding tasks while maintaining safety standards.

  • 4-inch diameter knotted cup brush for efficient coverage
  • 5/8-11 threaded arbor for secure attachment
  • Choose between .020 or .014 wire thickness for different levels of aggression
  • Rated for up to 9,000 RPM for high-speed performance
  • Available in single or pack of 2 quantities
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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Natalie Q. ★★★★★

Swapped out my old wire wheel for this knotted cup brush, the 5/8-11 threaded hub mounted perfectly on my grinder with zero wobble. It chewed through heavy rust and mill scale in just a few passes, exactly the aggressive cleaning I needed.

Eli ★★★★★

Took this 4-inch brush to a rusty steel beam and the .020 wire made quick work of it without bogging down my grinder. The 5/8-11 hub threaded on perfectly with no wobble.

Eli D. ★★★★★

The .014 wire is stiff enough to strip heavy paint from steel beams without wearing down too fast. The 5/8-11 hub threaded right onto my grinder with no adapter needed.