Product Specification
4" X 5/8"-11 CRIMPED CUP BRUSH - CARBON STEEL
For larger steel surfaces that need fast cleanup without the hard bite of a knotted brush, the 4" x 5/8"-11 Crimped Cup Brush - Carbon Steel delivers broad, flexible brushing for rust, oxidation, deposits, and general surface contamination. Built with 0.014" carbon steel wire, it gives fabricators and maintenance crews more coverage per pass while still allowing the wire to flex and follow the workpiece.
The crimped wire construction creates a more conformable brushing action than tightly knotted wire. That makes this brush a strong choice for cleaning flat and moderately contoured surfaces where you want effective removal of lighter buildup without the concentrated aggression of a knot-style cup.
Its larger 4" diameter increases working coverage over compact cup brushes, making it especially useful on plate, fabricated assemblies, frames, and other broader surfaces. A 5/8"-11 threaded arbor provides direct spin-on installation on compatible angle grinders, while the 8,500 RPM maximum rating makes proper grinder-speed matching essential.
Product Specifications
| Specification |
Details |
| Diameter |
4" |
| Wire Material |
Carbon Steel |
| Wire Diameter |
0.014" |
| Wire Style |
Crimped |
| Brush Type |
Cup Brush |
| Arbor |
5/8"-11 Threaded |
| Maximum RPM |
8,500 |
Features
-
Flexible crimped-wire construction for broad surface cleaning
-
0.014" carbon steel wire for rust, oxidation, deposits, and general metal cleanup
- Large 4" cup profile provides increased coverage across broader surfaces
- More conformable brushing action than stiff knotted-wire cup brushes
- Well suited for flat and moderately contoured workpieces
-
5/8"-11 threaded arbor for direct spin-on installation
- 8,500 RPM maximum rating
- Useful for fabrication, maintenance, repair, and general surface preparation
- Strong choice for plate, frames, fabricated assemblies, and larger work areas
Applications & Performance
The 4" crimped cup brush is designed for broad, flexible surface cleaning. Its larger cup profile places more wire against the workpiece than smaller brushes, helping clean larger areas efficiently while the crimped wire flexes to follow mild surface contours.
Common applications include:
- Light to moderate rust removal
- Oxidation cleanup
- Removing surface deposits
- General steel cleaning
- Surface contamination removal
- Cleaning fabricated components
- Light weld-area cleanup
- Preparing surfaces before painting or coating
- Maintenance and repair work
- Cleaning flat and moderately contoured steel surfaces
The larger working footprint makes this brush especially useful when surface coverage matters, while the crimped construction provides a more forgiving action than knotted wire.
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 4" cup brush on a compatible angle grinder with a 5/8"-11 spindle, adequate brush capacity and a maximum speed no greater than 8,500 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 8,500 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 4" 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.
