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Bronze knot wire cup brush, silver finish, threaded hole

Weiler

Weiler 13299 2-3/4 in Bronze Knot Wire Cup Brush

SKU CH-J5C1-T58M0 MPN 13299

A bronze knot-wire cup brush for right-angle grinders, 2-3/4 in diameter with a 5/8-11 threaded hole and 14,000 RPM maximum speed

  • Product typeSanders
  • Bronze bristles resist sparking on carbon steel
  • 2-3/4 inch cup diameter covers wide surfaces
  • 02 inch wire thickness removes heavy scale
  • 14,000 RPM maximum speed matches right-angle grinders
  • 5/8-11 threaded hole fits standard grinder spindles

Bronze Knot Wire Cup Brush

This bronze knot wire cup brush is designed for surface preparation on carbon steel using a right-angle grinder. The twisted knot bristles provide aggressive cleaning action for removing rust, scale, and paint. It mounts via a 5/8 in.-11 threaded hole for secure attachment. Maximum operating speed is 14,000 RPM.

Metalworkers cleaning carbon steel

Suited for welders and fabricators needing to clean carbon steel surfaces with a right-angle grinder. The bronze wire reduces the risk of contamination on stainless steel workpieces. Not intended for users requiring a quick-change mounting system or a different arbor size. Buyers needing a softer bristle material for delicate surfaces should look elsewhere.

5/8 in.-11 threaded arbor

The 5/8 in.-11 threaded hole is the critical specification that determines compatibility with your grinder. Verify your tool's spindle size before purchase to ensure a proper fit. The brush diameter is 2-3/4 in. with a 0.02 in. wire thickness and 1 in. bristle length. Exceeding the 14,000 RPM limit creates a safety hazard.

How it compares

Measured against everything we stock in Sanders, Rotary & Demolition Tools, at today’s prices. Recalculated every night.

Price $37.99
Pricier than about 63% of the 477 comparable items (median $21.99).

Specifications

Product
Brand nameWeiler
Model name13299
Product typeSanders

Questions about this item

When will the 0.02 in bronze knot wires on this 13299 cup brush need replacing?

Replace the brush once the bronze knot wires wear down or break, which varies with the material being cleaned and the pressure applied during use.

What limits continuous operation at the 14,000 RPM maximum speed?

The 14,000 RPM rating is the maximum safe operating speed; exceeding it risks wire breakage and brush failure.

How much heat does the 5/8 in.-11 threaded connector generate during all-day grinding?

The threaded connector itself produces minimal heat; most warmth comes from friction between the bronze wires and the workpiece.

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