Towne Technologies, Inc.
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Towne Technologies, Inc. 
6 - 10 Bell Ave., P.O. Box 460 
Somerville, NJ 08876  USA 
Phone: (908) 722-9500 
FAX: (908) 722- 8394


(Chemical Milling)


Towne Technologies photo-fabrication techniques, (also know as  chemical machining, photo etching, photo engraving, and photochemical  machining), provide high-precision, close-tolerance complex metal forms in thin metals or foils. Since photo-fabrication eliminates the use of punches and dies, Towne's processing techniques enjoy special advantages over other production methods:

Speed - Finished parts can be delivered in a matter of days.

Low cost - Inexpensive tooling & set up charges introduce economies on either prototype or volume production.

No burrs - Etching leaves precise edge definition that requires no finishing or tumbling.

Precision  - Tolerances can be closely controlled.

High volume or prototypes - since photo-fabrication has no tooling wear, components can be accurately reproduced over long run.  Phototooling is inexpensive, and keeps design change costs down to a minimum.

Versatility - Virtually any shape can be produced by photo-fabrication, almost any design that can be drawn can be etched.

No metal stress or grain distortion - The physical properties are retained.

Flexibility -photo-fabrication permits short experimental production runs in which design modifications can be made on prototype patterns at minimal cost.

PRECISION APERTURES - Electroformed & Etched

·Single or multiple aperture
·Wide variety of materials

·Standard or  Custom

·Variety of finishes

MATERIALS: Towne Precision Apertures are available as standard products in a wide variety of materials such as Nickel, Beryllium Copper, Molybdenum Stainless Steel, Brass and Kovar.

FINISHES: Finishes are available in Black Chrome, Nickel, and Gold.

SHAPES: Aperture shapes can be formed as diameters (pinholes), slits or any geometric shape.

PRECISION: Electroformed bi-metallic Apertures are available with standard tolerances from ±0.00004" to ±0.0001" while etched Apertures can be readily fabricated with opening tolerances ranging from ±0.0001" to ±0.0005". Tooling is available for a wide range of standard pinhole Apertures in both electroformed and etched configurations.


QUALITY CONTROL: Each Towne part is produced under the strictest quality standards. From the selection of material through the electroforming or etching process to final finishing and packaging, each piece is inspected and reinspected to assure full compliance with specifications. 

ENGINEERING ASSISTANCE: With more than 40 years of experience in the design and fabrication of precision photo-tools, Towne engineers are ready to help you. Just phone or write our engineering department for assistance or samples.

For a brief explanation of some of the DESIGN RULES associated with chemical milling, click HERE.

When supplying AutoCad files for quotations or production, a few CAD DRAWING RULES must be adhered to in order to make the files usable.

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