Technical Guide3 min read

How to Ensure Engraving Readability on Narrow Ejector Blade Surfaces

Key Takeaway: Minimum blade width for legible engraving: 2mm (single digit), 3mm (two digit), 4mm (three digit). Character height = 60–70% of blade width for optimal readability on molded parts.

Character Sizing Guidelines

Blade Width	Max Characters	Character Height	Readability
2mm	1 digit	1.2mm	Visible with magnification
3mm	2 digits	1.8mm	Visible to naked eye
4mm	3 digits or 2 chars	2.4mm	Easily readable
6mm	6 chars or dual marking	3.6mm	Excellent

Frequently Asked Questions

Does the narrow blade width affect engraving durability?+

No — laser engraving depth (0.05–0.10mm) is the same regardless of blade width. However, on narrow blades, the engraved characters are proportionally smaller and may wear faster due to higher contact pressure per unit area. Expect 50,000–100,000 legible cycles on 2mm blades vs 200,000+ on 6mm blades.

Can logos be engraved on ejector blades?+

Yes, for blade widths ≥4mm. The logo is converted to a bitmap and laser-engraved at 0.05mm depth. Maximum logo area: 70% of the blade tip face. Complex logos with fine lines may not reproduce well on blades narrower than 6mm.