Product Specification
6" X 5/8"-11 CRIMPED CUP BRUSH - CARBON STEEL
For large steel surfaces where coverage and speed matter, the 6" x 5/8"-11 Crimped Cup Brush - Carbon Steel delivers a wide, flexible cleaning footprint for rust, oxidation, deposits, and general surface contamination. Built with 0.014" carbon steel wire, this is the large-format crimped cup in the lineup — ideal when you need to clean more surface per pass without stepping up to the stiffness and aggression of knotted wire.
The crimped wire construction allows the individual wires to flex as they contact the workpiece, helping the brush conform to mild contours and irregularities while maintaining broad surface contact. That makes it a productive choice for plate, frames, fabricated assemblies, structural components, and other large workpieces that need consistent general-purpose cleaning.
Its 6" diameter maximizes coverage, while the 5/8"-11 threaded arbor provides direct spin-on installation on compatible large-frame angle grinders. The brush carries a 6,600 RPM maximum rating, making it especially well suited to properly matched lower-speed equipment built to handle larger cup brushes.
Product Specifications
| Specification |
Details |
| Diameter |
6" |
| Wire Material |
Carbon Steel |
| Wire Diameter |
0.014" |
| Wire Style |
Crimped |
| Brush Type |
Cup Brush |
| Arbor |
5/8"-11 Threaded |
| Maximum RPM |
6,600 |
Features
- Large 6" cup profile for maximum surface coverage
-
Flexible crimped-wire construction for broad, controlled cleaning
-
0.014" carbon steel wire for rust, oxidation, deposits, and general metal cleanup
- More conformable brushing action than stiff knotted-wire cup brushes
- Well suited for large flat and moderately contoured workpieces
-
5/8"-11 threaded arbor for direct spin-on installation
- 6,600 RPM maximum rating
- Excellent for plate, frames, structural components, and large fabricated assemblies
- Built for fabrication, maintenance, repair, and high-coverage surface preparation
Applications & Performance
The 6" crimped cup brush is built for high-coverage surface cleaning on large workpieces. Its wide cup profile keeps a substantial amount of wire in contact with the surface, helping crews clean broad areas efficiently while the crimped wire flexes to follow mild contours.
Common applications include:
- Light to moderate rust removal
- Oxidation cleanup
- Removing surface deposits
- General steel cleaning
- Surface contamination removal
- Cleaning large steel plate
- Cleaning frames and fabricated assemblies
- Light weld-area cleanup
- Structural-steel maintenance
- Preparing surfaces before painting or coating
- Industrial maintenance and repair
- Cleaning flat and moderately contoured metal surfaces
The 6" working footprint is especially useful when coverage and productivity matter more than tight-access maneuverability.
Use light to moderate pressure and let the wire tips do the work.
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 6" cup brush on a compatible angle grinder with a 5/8"-11 spindle, adequate brush capacity and a maximum speed no greater than 6,600 RPM. Match the actual hub seating and allow room for wire flare.
Compatible examples include:
-
Makita® GA7011C — 7" angle grinder; 6,000 RPM.
-
Makita® GA7021 — 7" angle grinder; 6,600 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 6,600 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 a 6" 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 can flatten the crimped wire and 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.
