在该应用中，采用了15%石墨填充的Vespel?SP-21,该材料具有优异的耐温、耐磨，低磨损和高强度。在-40°C 至 +150°C，甚至更高的温度范围内，Vespel?SP-21可以保持很好的尺寸稳定性。Vespel?SP-21轴套可以采用嵌件注塑镶入其他材料中，并且可以很容易加工成高精度的成品尺寸。
Application Description
Over-moulded bushings for gas pedal sensor used in almost all Mercedes passenger cars.
Benefits Gained
Aids accuracy. The excellent dimensional stability of the Vespel? parts helps assure accurate measurements over a wide range of temperature and humidity conditions.
Resists high temperatures. Vespel? parts can serve at temperatures far above Schlumberger’s current maximum service rating of 400°F (204°C) for the flowmeter.
Fights stress. Thanks to their toughness and strength, the Vespel? bobbin parts withstand the stresses imposed by handling and winding.
Materials Selected and Why
Vespel? with 15% graphite was chosen for its heat and wear resistance, low friction performance and high compressive strength. SP21 maintains very good dimensional stability between -40°C and +150°C or even higher. Vespel? can easily be over-moulded and machined to final precise dimensions.