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Quality and Standards
Our Production Quality and Standards
Exceptional Products | Affordable Prices | Made in the USA
Exceptional ProductsAffordable PricesMade in the USA
Production Quality Is Our First Priority
Alumina Ceramic Components, Inc. builds quality into all of its custom-made parts, and our entire staff makes quality our number one priority. Strict quality control is maintained throughout the complete manufacturing process, from initial tool design through final packaging and shipment.
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All parts are submitted to a number of physical dimensional checks in the green state, as well as after firing. To ensure the highest level of quality, fired density and statistical quality checks are performed utilizing a variety of dye penetrant test methods, as well as SPC controls. ACCI is ISO certified.
How We Measure Our Quality Standards
The general dimensional tolerances listed below are typical for most alumina components, particularly those of simple geometry and good symmetry. We always consider unique designs on an individual basis, since it may be necessary to apply a broader tolerance to them. Therefore, the designs are subject to agreement between the purchaser and ACCI.
Tolerance
Standard ceramic tolerance for pressed parts is ±1% or ±.002, whichever is greater. For green machined parts, standard ceramic tolerance is ±1% or ±005, whichever is greater.
Angular
The tolerance is ±2°.
Parallelism
Parallelism will be considered satisfactory if the thickness measured at any point is within the dimensional tolerance.
Camber
Camber is expressed as the ratio between arch height and the maximum length of the part. A maximum camber of .006 in./in. is considered typical.
Length-to-Wall Ratio
The overall length of a part to the wall thickness should be within a 10:1 ratio.
Chamfers
All pressed parts with a chamfer/chamfers will require a .003/.005 flat for pressing. This is necessary to avoid breaking the tool.
Tumbling
All parts are tumbled prior to shipment. The tumbling process is used to clean the parts after firing. Tumbling results in all parts having a radius of .003-.005 on all edges.
Per ASTM D2442-75
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