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Weiler 4-inch steel knot wire brush with 1/2-13 arbor

Weiler

Weiler Sta-4 .020 1/2-13 4in Dia Wire Brush

SKU CH-A25J-S3PRC

4-inch knotted wire brush with 24 knots, .0200 steel wire and 1/2-13 UNC arbor runs at 20000 rpm for aggressive deburring and weld cleaning

  • Product typeCarpet Seam Binders
  • Aggressive cleaning with rugged knot-type construction
  • High-impact action from 24 steel knots
  • 20000 rpm maximum speed for severe applications
  • 1/2-13 UNC arbor fits straight and angle grinders
  • .0200 in wire removes rust, paint and weld scale

Rugged Knot-Type Wire Brush

The Weiler Sta-4 is a 4-inch diameter wire brush built with rugged knot-type construction for aggressive, high-impact action. It targets professionals who need severe surface preparation on metal. The steel wires measure .0200 inches and suit roughening, deburring, and cleaning prior to welding. It also handles rust, paint, weld scale, and corrosion removal effectively.

1/2-13 UNC Arbor Fits Common Grinders

This brush mounts on a 1/2 inch - 13 UNC arbor thread, compatible with straight grinders, bench grinders, pedestal grinders, and right angle grinders. The 1/2 inch face width and 7/16 inch face plate thickness provide stability during operation. A 7/8 inch trim length exposes the wire tips for immediate contact. One brush per pack weighs 1/2 lb and requires no additional adapters for standard spindles.

24 Knots Sustain 20000 RPM Maximum

Twenty-four knots maintain structural integrity at the maximum rated speed of 20000 rpm for sustained high-impact work. The knot design resists wire fatigue during prolonged deburring or scale removal sessions. Operators must match grinder speed to the 20000 rpm limit to avoid brush failure. It is not suited for delicate finishing or soft-material polishing where a lighter touch is required.

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Price $19.99
Typical for this category: the median of 2,607 items is $18.99.

Specifications

Product
Brand nameWeiler
Product typeCarpet Seam Binders

Questions about this item

Will the 0.0200 in wire brush reach its 20000 rpm limit during sustained grinding?

The brush is rated for a maximum of 20000 rpm; sustained use should stay below this speed to prevent wire fatigue and premature wear.

How much heat or vibration does the 4 in knot wheel generate during all-day use?

The rugged knot-type construction and 1/2 in face width are designed for severe applications, but prolonged high-speed operation will produce noticeable heat and vibration.

Does my grinder need a 1/2 in - 13 UNC arbor to mount this wheel?

Yes, the brush requires a 1/2 in - 13 UNC threaded arbor, compatible with straight, bench, pedestal or right-angle grinders.

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