Product Specification
2-3/4" X 5/8"-11 CRIMPED CUP BRUSH - CARBON STEEL
For rust, oxidation, surface contamination, and general cleanup that does not require the hard bite of a knotted brush, the 2-3/4" x 5/8"-11 Crimped Cup Brush - Carbon Steel delivers fast, flexible brushing across a broad working area. Built with 0.012" carbon steel wire, it is a strong everyday choice for cleaning metal surfaces while conforming more easily to contours, edges, and irregular workpieces.
The crimped wire construction gives each wire more freedom to flex as it contacts the surface. Compared with stiff knotted wire, that produces a more forgiving brushing action for light rust, deposits, oxidation, dirt, and general surface contamination while still providing the coverage advantage of a cup-style brush.
Its compact 2-3/4" diameter combines broad surface contact with excellent maneuverability around fabricated parts, weldments, and smaller work areas. A 5/8"-11 threaded arbor provides quick spin-on installation on compatible angle grinders, and the brush carries a 14,000 RPM maximum rating for properly matched equipment.
Product Specifications
| Specification |
Details |
| Diameter |
2-3/4" |
| Wire Material |
Carbon Steel |
| Wire Diameter |
0.012" |
| Wire Style |
Crimped |
| Brush Type |
Cup Brush |
| Arbor |
5/8"-11 Threaded |
| Maximum RPM |
14,000 |
Features
-
Flexible crimped-wire construction for general-purpose surface cleaning
-
0.012" carbon steel wire provides effective cleaning with more conformity than knotted wire
- Cup-style geometry creates a broad working area for efficient surface coverage
- Compact 2-3/4" diameter provides good control around fabricated parts and smaller workpieces
- Well suited for light rust, oxidation, deposits, and surface contamination
- More flexible brushing action than knotted cup brushes
-
5/8"-11 threaded arbor for quick spin-on installation
- 14,000 RPM maximum rating
- Useful for fabrication, maintenance, repair, and general metal cleaning
Applications & Performance
Crimped cup brushes are designed for broad, flexible surface cleaning. The individual crimped wires flex as they move across the workpiece, allowing the brush to follow mild contours and irregular surfaces more readily than a stiff knotted-wire cup.
Common applications include:
- Light rust removal
- Oxidation cleanup
- Removing surface deposits
- General metal cleaning
- Surface contamination removal
- Cleaning fabricated components
- Cleaning weldments after lighter-duty operations
- Preparing surfaces before painting or coating
- Maintenance and repair work
- Cleaning moderately contoured metal surfaces
The cup profile allows multiple wires to contact the surface at once, while the flexible crimped construction helps the brush conform instead of concentrating all of its force into a rigid working edge.
Use light to moderate pressure and allow the wire tips to perform the cleaning.
Materials
Recommended for cleaning and surface preparation on compatible ferrous materials, including:
- Carbon steel
- Mild steel
- Structural steel
- Cast iron
- Wrought iron
- Other compatible ferrous metal surfaces
Keep carbon steel brushes dedicated to ferrous work when cross-contamination matters. For stainless-steel applications where iron contamination must be minimized, use a dedicated stainless steel wire brush.
Machine Compatibility
Use this 2-3/4" cup brush on a compatible angle grinder with a 5/8"-11 spindle, adequate brush capacity and a maximum speed no greater than 14,000 RPM. Match the actual hub seating and allow room for wire flare.
Compatible examples include:
-
Benchmark Abrasives BMT-AGBC4570_1 — 4-1/2" corded angle grinder; 5/8"-11 spindle; 11,000 RPM.
-
Makita® 9557PB — 4-1/2" angle grinder; 11,000 RPM.
-
Milwaukee® 2880-20 — 4-1/2" / 5" angle grinder; 8,500 RPM.
-
Milwaukee® 2881-20 — 4-1/2" / 5" angle grinder; 8,500 RPM.
Other machines may be compatible. Use the manufacturer-specified wire-brushing setup and guard, with secure hub engagement and adequate operating clearance. Other grinders meeting these requirements may also be suitable.
Safety Tips
- Never exceed the brush's 14,000 RPM maximum speed.
- The brush's rated RPM must meet or exceed the maximum operating speed of the power tool.
- Confirm the grinder is designed to safely accommodate the cup brush and its operating wire flare.
- Inspect the brush before every use and replace it if damaged, excessively worn, loose, or distorted.
- Confirm the 5/8"-11 threaded arbor is fully seated and secure before operation.
- Use the appropriate grinder guard and maintain adequate clearance around the rotating brush.
- Wear proper PPE, including eye and face protection, hearing protection, gloves, appropriate clothing, and respiratory protection when required.
- Keep bystanders away from the work area and direction of rotation.
- Use light to moderate pressure. Excessive force bends the wire and can accelerate wire fatigue.
- Allow the grinder to reach operating speed before contacting the workpiece.
- Follow all operating and safety instructions for both the power tool and wire brush.
