Precision Mechanics

By Wikepedia definition, “Precision Mechanics (also “fine mechanics”) is an engineering discipline that deals with the design and construction of smaller precision machines, often including measuring and control mechanisms of different kinds.”
Metal parts of such mechanisms always have thin dimensions with narrow tolerances. Maintaining the level of dimensions’ deviation as low as it has been designed, is the main requirement to these parts’ quality.
Increased corrosion resistance, appropriate surface appearance, removing leftovers of previous processing, like fine burrs after machining, oxide hues of thermal tempering, sharp edges from laser, are usual demands to Precision Mechanics parts quality. All these tasks are effectively solved by proper implementation of Passivation, Bright Passivation, Electropolishing, Etching.
However, achieving all these quality demands contradicts the main requirement to these parts’ quality: exact dimensions within narrow tolerances. The reason is that any effective anode treatment process is accompanied by the removal of the metal surface layer and reducing the size of the items, while the value of the reduced thickness has a tolerance of its own.
Finish Line, after overcoming these complexities by thorough research and approprate technological development, has successful experience in commercial running of electropolishing of precise parts at production rate of thousands units per day. Strict coordination of dimensional policy with machining operators, rigorous dimensions’ control at all production stages and correct choise and calculation of the process parameters are needed for the proper quality managing. For the best and reliable results, we run an online used an appropriate computer program. See some examples of electropolished parts for precision mechanics in the gallery.

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Anode Treatment

Anode treatment beneficiates metal surface through metal dissolving and oxidation. In case no coating is allowed, Anode Treatment is a way to enhance your parts’ surface qualities. more >>


Passivation is a classic anode treatment to improve corrosion resistance of metals, comparing to not treated parts, through completing natural formation of metal oxides surface layer. more >>

Bright Passivation

Bright Passivation improves corrosion resistance of metals, comparing to not treated parts, removes spots from previous processing and provides the parts with brighter appearance. more >>


Etching is an old craft which technically comprises a vigorous anode treatment process, widely exploited in industry. Etching metal surface as a whole makes it uniformly rough and porous more >>

Color Anodizing

Color Anodizing is a unique Titanium only applied process granting to metal surface a wide spectrum of controllable vivid interference colors, which are stable, uniform and repeatable more >>

Surface preparation

Surface preparation ensures the after Anode Treatment surface features as aimed. It includes both quality improving (like de-burring) and surface beneficiation (like surface roughening) more >>

Surface cleaning

Surface Cleaning is an essential completing operation after any Anode Treatment intended washing the surface from leftovers of previous treatment, using purified water at the end step more >>

Clean Room Packing

Packing in Clean Room class 1000 with laminar cameras class 100 allows us to implement packaging procedure for customers’ products having the highest cleanness requirements more >>