0.02mm ultra thin metal washer

0.02 mm ultra‑thin washers serve critical functions for fine‑tuning assembly gaps, compensating tolerance deviations, sealing and electrical contact in precision equipment. Traditional stamping and laser cutting face obvious technical bottlenecks when manufacturing washers at 0.02 mm thickness. Stamping introduces mechanical squeezing stress that easily causes wrinkling and deformation. Laser cutting brings thermal‑affected zones which warp ultra‑thin foils. Chemical etching of 0.02mm thick washers is a proven non‑contact cold‑processing solution to deliver flat, burr‑free, stress‑free ultra‑thin washer components.

What Are 0.02 mm Chemically‑Etched Washers

0.02 mm chemically‑etched washers are ultra‑thin flat ring‑shaped or special‑form metal washers manufactured by photochemical etching. The whole process relies on chemical dissolution instead of mechanical impact or high‑energy thermal cutting. The finished washers keep original material properties, maintain excellent flatness, clean burr‑free inner and outer edges, and consistent 0.02 mm material thickness across the whole part.

Beyond standard circular washers, custom irregular‑outline washers, washers with special‑shaped holes, multi‑notched locating washers can all be produced from one single sheet through photo‑tool pattern transfer.

Suitable Base Materials

‑ Stainless steel 304 / 316: Most popular for general‑purpose adjustment and sealing ultra‑thin washers ‑ Copper, brass: For conductive contact, thermal‑conductive compensation washers ‑ Nickel alloys: For high‑temperature and corrosion‑resistant working conditions ‑ Spring steel: For elastic‑contact ultra‑thin washer‑shaped components

Core Advantages for 0.02 mm Thick Washer Etching

1. Zero mechanical stress: Cold chemical‑etching process without stamping extrusion or laser heat input. Effectively avoids wrinkling, curling and residual‑stress‑caused warping for 0.02 mm ultra‑thin foils.
2. Completely burr‑free edges: Inner holes and outer contours are chemically dissolved, no secondary deburring operation required. Eliminates risks of scratch‑induced damage to mating parts.
3. Consistent thickness retention: Original foil thickness remains unchanged, uniform 0.02 mm thickness over the full washer surface.
4. High design flexibility: Modify digital photo‑tool files to adjust washer shape, inner hole diameter and outer profile, no expensive hard stamping dies needed.
5. High sheet‑level nesting efficiency: Multiple washers can be densely arranged on one metal sheet, suitable for prototype sampling and large‑volume batch production.
6. Stable dimensional repeatability: Uniform etching performance guarantees consistent dimension from first sample to mass‑production batches.

Critical Design & Process Notes for 0.02 mm Etched Washers

0.02 mm belongs to ultra‑thin foil grade, several practical constraints should be taken into account during drawing design: ‑ Maintain reasonable width for washer annular wall; excessively narrow annular rings may bring handling‑fragility risks. ‑ Follow chemical‑etching factor rules for inner hole and outer contour dimensions; our engineering team applies proper etching compensation on photo‑tools. ‑ Avoid overly‑tiny local cut‑outs which may result in fragile tiny structures. ‑ For large‑diameter 0.02 mm washers, add auxiliary carrier tabs for sheet‑processing support, tabs can be easily removed in post‑processing. ‑ Strict raw‑material foil flatness requirement; raw‑material waviness will directly influence final‑part flatness performance.

Our engineering team provides free DFM review. We will identify fragile‑structure risks and give practical optimization suggestions before formal production.

Chemical Etching Production Workflow for 0.02 mm Washers

1. Submit CAD / DXF drawings, specify material, washer dimension parameters, quantity and post‑treatment requirements
2. Engineering evaluation, etching‑compensation calculation, DFM feedback and formal quotation
3. Drawing and technical‑spec confirmation
4. Raw foil cleaning, photoresist dry‑film laminating, UV exposure, developing
5. Double‑sided symmetrical spray chemical etching to form washer profiles
6. Stripping photoresist film, multi‑stage cleaning and drying
7. Carrier tab removal, flatness sorting, full‑dimensional optical inspection
8. Dust‑free vacuum packaging to prevent oxidation and physical damage, global export shipment

Typical Application Scenarios

‑ Precision mechanical gap‑adjustment washers for bearings, optical instruments and mould assemblies ‑ Electronic equipment assembly compensation gaskets, EMI contact ultra‑thin washers ‑ Medical precision instrument internal spacing washers ‑ Semiconductor test fixture spacing and sealing components ‑ Aerospace‑grade miniature equipment ultra‑thin compensation washers

If you require custom 0.02 mm thick chemically‑etched washers, send your drawings for a no‑obligation quotation.