• High equipment investment Low efficiency of deep holes (hole depth > 5 mm)
• Laser thermal impact (nitrogen protection is required to prevent oxidation when processing stainless steel)

• The hole wall roughness is high (Ra 3.2–6.3 μm) The drill bit is easy to wear and the thin plate is easy to deform.
• Drilling and chip removal: Deep hole processing requires internal cooling drill (to avoid chip blockage)

• High mold cost when quantity is small.
• The aperture is not adjustable and the die is worn out.
• The hole has errors (control method: regular inspection of punch clearance, burr prevention and tolerance reduction).
• Material thickness restrictions.

Etched Plates in Stainless Steel & Plain Steel

Regarding the punched metal plates, the minimum hole Boegger can supply is 0.8 mm. But it can not meet the filtration need, especially the application requiring extremely fine holes. Thus, Boegger adopts another advanced production line - metal etching, which creates chemically micronic flow channels on the surface of metal panel, to enable precision rate ranging from 30 μm to 100 μm absolutely.

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