How Are Speedometers Made?
The speedometer is one of the most commonly consulted gauges in a car. Making a speedometer is a complex process due to the precision required. Modern-day speedometers are electronic, while speedometers in older cars are mechanical.
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Components
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Modern-day speedometers contain both metal and plastic parts. Most of the metal parts are steel, but some parts are made of aluminum, titanium, manganese and zirconium.
Assembly
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Lower-quality speedometers contain a fixed rivet so that they are impossible to take apart. A higher-quality speedometer contains two separate pieces so that a mechanic can disassemble and recalibrate it.
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Calibration
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In a mechanical speedometer, the manufacturer uses an electromagnet to fine-tune the strength of the magnet in the gauge. An electronic speedometer is calibrated by fine-tuning the memory of the gauge's meter.
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References
Resources
- Photo Credit speedometer image by Albert Lozano from Fotolia.com
