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How To Choose The Right PCB Polishing Brush?

How To Choose The Right PCB Polishing Brush?

February 8,2023.

Nylon brush strips are an ideal choice in the field of wide line manufacturing in PCB manufacturing, such as line width/line spacing > 200um (8mil), copper foil thickness ≥ 35um, and sometimes can be relaxed to > 150um (= 6mil) . Due to its particularly high resilience, the nylon strip brush will not damage the brush roller when the PCB board is warped or the drill bit is broken, and the brush roller will not be damaged if the operator makes mistakes such as forgetting to turn on the cooling water. Stabilize and brush the circuit board and brush roller. Next, Aoqun Brush Industry will introduce the role of nylon strip brushes in PCB manufacturing.


PCB Polishing Brushes


1. Deburring process after drilling, when the burr is larger than 75um, choose the following combination: 180# silicon carbide and 240# silicon carbide

2. In the deburring process after drilling, when the burr is larger than 50um, the following combination should be selected: 240# silicon carbide and 320# silicon carbide.

3. In the deburring process after drilling, when the burr is less than 50um, choose the following combination: 320# silicon carbide and 320# silicon carbide.

4. For pretreatment of photosensitive film, choose the following combination: 320# silicon carbide and 500# silicon carbide.

5. After PTH treatment, choose the following combination: 320# silicon carbide and 320# silicon carbide.

6. For pre-treatment of green oil (solder resist) coating, choose the following combination: 500# silicon carbide and 500# silicon carbide.

7. For the pre-treatment of the gold plate (including gold fingers), the following combination is selected: 800# alumina and 1000# alumina.

8. For the volcanic ash grinding machine, 6pcs of pure nylon spring brushes are used.

9. For flexible plate grinding, choose the following combination: 600# alumina and 1000# alumina.


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