Precision housings and enclosures are decisive elements in product reliability. A well-machined housing holds electronics in exact positions, provides a stable thermal path, keeps out moisture and dust, and shields sensitive circuits from electromagnetic interference. The opposite is also true: a h...
A rotary indexing table begins to vibrate at 2,400 revolutions per minute, three weeks after installation. The service technician measures the drive shaft and finds a runout of 0.03 mm against a drawing specification of 0.008 mm. Replacing the shaft solves the problem, but the downtime costs more t...
A machine builder once ordered 5,000 turned shafts with only "precision fit" written on the drawing. The parts stayed inside the stated diameter range, but surface finish varied from batch to batch, and assembly stoppages followed. The problem was not the lathe; it was the specification. CNC turnin...
An engineer I worked with recently designed a small aluminum housing for a medical monitoring unit. To save weight, she specified a 0.8 mm wall thickness and a tight machining tolerance of 0.05 mm. The first batch came back with warped edges and two cracked bosses. The parts looked fine on paper, b...
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