Description

Makita D-77475 Knotted Wire Cup Brush – 65mm x M14-2 – Aggressive Rust & Weld Removal

Name: Makita D-77475 Knotted Wire Cup Brush – 65mm x M14-2
SKU: 315-73A
Availability: InStock

Need to strip heavy rust, knock down weld scale, or clean up rough castings? The Makita D‑77475 knotted wire cup brush gets the job done without babysitting.

Unlike crimped wire brushes that fold over under pressure, this one has tightly twisted knots for aggressive action. It’s made for angle grinders with the common M14 x 2 spindle size — just thread it on and go.

Key details

65mm cup diameter – wide enough to cover ground quickly, compact enough to control on flat or slightly contoured surfaces.
M14‑2 thread – fits most European‑spec angle grinders, including Makita, Bosch, Metabo, and similar brands (double‑check your grinder’s spindle before buying).
Knotted wire – each bundle is twisted and formed into a knot. That means more impact force, longer life, and less wire shedding compared to crimped brushes.
Steel wire – best for ferrous metals, stainless steel, and iron. Not for aluminum or soft metals (it’ll leave scratches).

Where people actually use it

Weld prep and post‑weld cleaning
Removing heavy rust from steel beams, trailers, or machinery
Stripping thick paint or epoxy coatings
Cleaning concrete forms or leaving a brushed finish on mild steel

Real‑world trade‑offs

It’s aggressive. If you’re cleaning light surface rust or soft wood, this brush will chew it up. Use it with a variable speed grinder if you want more control — around 4,000–6,000 RPM works well. And wear your gloves and face shield. Knotted wires can break off at high RPM, and they’re sharp.

Why not cheaper generic brushes?

The off‑brand ones often shed wires on day one, go out of balance, or wear flat in twenty minutes. Makita’s D‑77475 stays round longer and keeps its bite. You’ll swap brushes less often and waste less time.

Quick specs

Brand: Makita
Model: D‑77475
Type: Knotted wire cup brush
Diameter: 65 mm
Thread size: M14 x 2 (right‑hand)
Max RPM: 12,000 (practical range 4,500–8,500)
Wire material: Carbon steel
Application: Heavy rust, weld slag, paint removal on steel

Bottom line
If you’re tired of soft brushes that bounce off heavy rust, grab the Makita 65mm knotted cup brush. Works hard, fits M14 grinders, and doesn’t pretend to be something it’s not.

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Makita D-77475 Knotted Wire Cup Brush – 65mm x M14-2

Description