Extreme temperature ranges, high pollution levels, high vibration levels, and 24/7/365 operation call for highly engineered drive components which can take the abuse.
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Technical articles from R+W Antriebselemente GmbH
Flexible and rigid Line Shafts, Spider, Servo and Shaft Couplings for the Requirements of the future
High torque drive applications typically involve larger load inertias and slower ramp times for acceleration and deceleration. This makes an abrupt and unintentional stoppage of the load potentially more damaging to drive components than in the case of lighter equipment which is more likely to have been designed for quicker movements.
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The trend in this field is clearly toward higher drive speeds. In the mean time, speeds in the range of 50,000 rpm are being attained routinely. These high-performance drives increase the productivity of processing machines through increased feed rates as well as increased acceleration rates.
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As a primary or redundant safety device, backlash free ball-detent torque limiters serve as a mechanical circuit breaker for machine drive protection, disconnecting drive and driven elements accurately (+/-5% torque), and virtually instantaneously (<3msecs), in the case of a machine jam or crash.
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The European ATEX directive really does apply to couplings, and for good reason. Mechanically generated sparks, electrostatic discharge, and high surface temperatures are all potential ignition sources in explosive atmospheres. Flexible couplings play an important role in creating and / or eliminating these explosion hazards in a serious way.
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Modern steel plants around the world are producing myriad steel variations and alloys to keep pace with the enormous global demand for this metal. Raw or recycled materials in charges as large as 100 tons are melted down in electric arc furnaces. Downstream processing of the steel by continuous casting systems into blooms or billets must take place immediately after smelting.
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Most mechanical systems at some point require that a flexible coupling be used to couple two or more steel shafts. Motors, gears, ball screws, and many other mechanical components typically involve shafting which is supported by multiple bearings.
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Servo systems require mechanical components with a high torsional stiffness in order to perform properly in applications requiring rapid acceleration and deceleration of high inertia loads. Flexible couplings usually have the lowest torsional stiffness of any component in a motion system.
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