Bosch Cup Brush - 70mm, M14

This wire cup brush is designed for light to medium-duty cleaning on metal surfaces, providing an extra-fine finish suitable for tasks like rust removal, coating removal, and surface preparation.

It is compatible with angle grinders that have an M14 thread on the spindle.

The maximum recommended rotational speed for this brush is 12,500 RPM.

While it can remove light to moderate rust, its crimped wire and 0.3 mm thickness are optimized for finer finishes and may not be aggressive enough for heavy-duty rust removal. Thicker wire options might be better suited for tougher jobs.

After use, clean off debris, store in a dry place, and inspect for damage before each use. Replace if bristles are excessively worn or damaged.

Crimped wire refers to bristles that have been pressed or bent into a wave-like pattern. This design helps to create a more consistent contact with the surface, leading to a more uniform finish and preventing the wires from splaying out too quickly.

This brush is specifically designed and intended for use on metal surfaces. Using it on wood or plastic is not recommended and could cause damage to the surface or the brush.

Verify that your angle grinder has an M14 thread. Ensure no debris is present on the grinder spindle or the brush's internal thread.

Check for bent or damaged wire bristles. Ensure consistent pressure and speed during operation. Consider if a different wire thickness might be more suitable for the material and desired finish.

Ensure the brush is screwed on straight and securely. Check for bent wire bristles or damage to the brush. Verify the angle grinder itself is functioning correctly.

Ensure you are using the brush within its intended light-to-medium duty application. Avoid excessive force or prolonged contact on very hard surfaces. Check for obstructions that could cause premature wear.