Perforated Metal Standards

Standard of Perforated Metal
Hole Size & Pitch Tolerance:
±0.05 mm (for hole size & pitch below 2.5 mm)
±0.10 mm (for hole size & pitch above 2.5 mm to 5.0 mm)
±0.25 mm (for hole size & pitch above 5.0 mm to 12.7 mm)
±0.50 mm (for hole size & pitch above 12.7 mm to 50.0 mm)
±1.27 mm (for hole size & pitch above 50.0 mm)

Cutting Tolerance Standards:
Unless otherwise specified, Qinghe’s standard shearing tolerance is ±3.2 mm

Width Tolerance
±2.7 mm (for 16 gauge and heavier, Up to and including 1525 mm)
±4.0 mm (for 16 gauge and heavier, Between 1525 and 1825 mm)
±2.7 mm (for 17 gauge and lighter, Up to and including 915 mm)
±4.0 mm (for 17 gauge and lighter, Between 915 and 1525 mm)
±3.4 mm (for 17 gauge and lighter, Over 1525 mm)

Length Tolerance:
-0.10m for length in coils

Panel Size Tolerance:
-Panel size (mm) x 0.5%

Standard Squareness Tolerance:
Unless otherwise specified, Qinghe’s standard squareness tolerance is ±3.2 mm

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