Nitinol, Zirconium and Titanium Metal Fabrication:
Metal Fabricating Delivers Precision Metal Parts

Let Fotofab fabricate your Nitinol, zirconium or titanium application. The speed and low cost of the process make it an ideal technique both for prototypes and for production quantities of precision metal parts, even into the millions. Fotofab is a leading manufacturer of precision metal parts used in thousands of companies, but these metal are significant to the medical industry and known for their superior strength and bio-compatibility.


Fotofab also works with many stainless steel alloys that are frequently used in medical applications. Stainless steel 316 is the most common. For more information about 'medical friendly' metals such as Nitinol, zirconium, titanium or stainless steel 316 please contact Fotofab's technical sales staff. We can send you metal specs and samples of the material. Also check out our Material Selection Tool for more details on these alloys.


Click here to see Typical Applications of the chemical etching process


Click here to view our Design Guide to Photochemical Machining


There are limits to the dimensions and tolerances that can be machined along the plane of the metal sheet, since etchants used in the photochemical machining process concurrently etch metals laterally and vertically through the thickness (T) of the sheet.


Because the metal at the surface of a sheet is exposed to etchant longer than the metal at the center of the sheet, the surface of a part etches laterally more than metal at the center. The following planar dimensions are related directly to the thickness of that sheet.


Hole Size/ Slot Width

The smallest hole diameter (D) or slot width that can be produced by the Fotofab process, as a general rule, is 1.2 times the metal thickness. The minimum practical diameter or slot width that can be machined is .005 inch (0.13 mm).


Bar Widths

Spacing of metal between the holes and/or slots in a design is not an issue using photochemical machining. However, when a part contains holes and/or slots that are spaced closely together, such as with a fine resolution screen or encoder disc, the width of the metal that remains between them is referred to as the bar width (W).


With metals over .005 inch (0.13 mm) thick, minimum bar widths must generally be at least 0.9 times the metal thickness. With metals at or under .005 inch (0.13 mm) thick, the minimum practical bar width that can be machined is .003 inch (0.076mm).


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