Key Takeaways

• Ferracut's standard cut tolerance is ±0.1mm to ±0.2mm depending on material and thickness.
• Positional accuracy (hole centres, feature locations) is typically ±0.1mm across standard sheet sizes.
• Thicker material and oxygen-assist cutting produce slightly wider tolerances than thin nitrogen-cut stainless.
• For precision engineering applications requiring tighter tolerances, discuss requirements before ordering.

Laser Cutting Tolerances: What Accuracy to Expect

Laser cutting is the most accurate sheet metal cutting process available for flat profiles. But achievable tolerances vary with material type, thickness, and cutting parameters. Here is what to expect from a modern fibre laser cutting service in Australia.

Standard Cut Tolerances

Ferracut's fibre laser systems achieve the following cut tolerances under standard production conditions:

• Cut dimension tolerance: ±0.1mm for material up to 4mm; ±0.2mm for 4–12mm; ±0.3mm for 12–20mm
• Positional tolerance (hole centres, feature locations): ±0.1mm across a 1500 × 3000mm sheet
• Edge squareness: The cut edge is perpendicular to the sheet face within 0.5° for material up to 6mm

What Affects Tolerance?

Several factors influence achievable accuracy:

• Material thickness: Thinner material cuts with higher accuracy. At 20mm, the beam waist is larger and edge squareness reduces.
• Assist gas: Nitrogen-assist cutting (used for stainless steel and aluminium) produces cleaner, narrower kerfs and better accuracy than oxygen-assist.
• Sheet flatness: Warped or twisted sheet stock causes the focal point to shift, affecting cut quality and tolerance.
• Geometry complexity: Very small features and tight radii at the minimum feature size limit may show slightly wider variation.

Tolerances vs. Your Design Requirements

For most mechanical brackets, enclosures, and structural parts, ±0.1–0.2mm is more than adequate. For precision jigs, gauges, or parts requiring controlled fits, specify your tolerance requirements when ordering and we can discuss parameter optimisation or secondary finishing.

As a reference: standard H7/g6 shaft-and-bore fits require tolerances of ±0.01–0.02mm — beyond what laser cutting can achieve. For precision bores and shafts, allow for reaming or grinding after laser cutting.

Get Your Parts Cut Today

Ready to put this into practice? Upload your DXF or DWG file to Ferracut and get an instant quote in under 30 seconds — no emails, no waiting, no minimum order.