Help with Variable Transmissions specifications:
Performance Specifications
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| Output Shaft Speed | No load rotational speed of output shaft at rated terminal voltage. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Output Torque | Output torque capability of the drive under constant running conditions. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Continuous Output Power: | Mechanical power provided by the drive output. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Drive Type
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| Technology | |||
| Your choices are... | |||
| Traction Drives | Traction drives depend upon friction between a speed adjusting mechanism and specially shaped input and output plates to achieve adjustable speed with relatively high efficiency. In one common type of traction drive, the motor drives an input cone that transmits the power from the cone to an output ring connected to the output shaft. The speed adjusting screw moves the motor and input cone up and down changes the point of contact between the cone and ring changing, the speed ratio of the drive as much as 10:1. With another common type of traction drive, a series of balls mounted on tiltable shafts press upon the faces of the input and output cones. A speed adjusting lead screw tilts the ball shafts to increase or decrease the effective speed ratio of the drive transmission by as much as 8:1. Traction drives are best suited for applications with steady state loading. | ||
| Belt and Chain Drives | Belt and train drives operate with adjustable diameter sheaves or pulleys. As the diameter of one sheave increases, the other decreases, and constant belt or chain length is maintained. | ||
| Gear Drives / Differentials | Gear drives are the most durable, rugged, and efficient of all adjustable-speed drives, but they are capable of providing only a specific number of fixed gear ratios. They are normally chosen for applications involving heavy loads or requiring long, trouble-free life. Generally, gear drives are more expensive than belt or chain drives. A special type of gear drives, differentials, is a set of gears with three independent, rotating members with a speed and torque relationship to each other. Differential efficiency is a function of the relative speed of the three elements. As relative speeds increase, the inherent losses due to basic gear efficiency, seals, and bearings also increase; thus, efficiency decreases. | ||
| Hydraulic Drives | There are two main methods of hydraulically varying the speed of the driven load when the driving motor is operating at a constant speed. The fluid coupling is a torque coupling whereby the input torque is equal to the output torque. This type of coupling suffers from very high slip losses, and is used primarily as a torque limited coupling during start with a typical slip during run of 5%. The constant power law still applies, but the power in the driven load reduces with speed. The difference between the input power and the output power is loss power dissipated in the coupling. In the case of a hydraulic pump and motor, the induction motor operates at a fixed speed, and drives a hydraulic pump, which in turn drives a hydraulic motor. In many respects, this behaves in a manner similar to a gearbox in that the hydraulic system transfers power to the load. The torque will be higher at the load than at the motor for a load running slower than the motor. | ||
| Eddy Current Drives | An eddy current drive is an adjustable speed drive in which a constant speed AC motor drives a drum assembly. Torque is transmitted from the input drum to an output rotor and output shaft by varying a magnetic field between the input drum and the output rotor. | ||
| Magnetic Coupling | The magnetic coupling replaces the physical connection between motors and loads with a gap of air. Motor torque is transferred to the load across this air gap. By varying the air gap between the magnets and conductor the strength of the magnetic field is changed and the output speed is controlled. | ||
| Other | Other unlisted, specialized, or proprietary configuration. Other configurations may include cable drives or industrial transmissions. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Output Shaft Position | |||
| Your choices are... | |||
| Horizontal | The drive is mounted with the output shaft in the horizontal position. | ||
| Vertical Up | The drive is mounted with the output shaft in the vertical up position. In order for a shaft to be orientated in a vertical position, considerations need to be made regarding lubrication. | ||
| Vertical Down | The drive is mounted with the output shaft in the vertical down position. In order for a shaft to be orientated in a vertical position, considerations need to be made regarding lubrication. | ||
| Other | Other unlisted, specialized, or proprietary configuration. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Shaft Orientation | |||
| Your choices are... | |||
| In-line | The input (driving) shaft and the output (driven) shaft can be connected with an imaginary axial line through the center of each shaft at 0° angle. | ||
| Offset Parallel | The input (driving) shaft and the output (driven) shaft are parallel, however they reside in the gearbox at different heights above the horizon. | ||
| Right Angle | The input (driving) shaft and the output (driven) shaft are perpendicular to one another. This is most common with worm gear speed reducers. | ||
| Other | Other unlisted, specialized, or proprietary shaft orientation, such as nonperpendicular angled shafts, where the input (driving) shaft and the output (driven) shaft are not perpendicular to one another, but are angled. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Mounting | |||
| Your choices are... | |||
| Base | The drive is mounted at the base with the use of external hardware (screws, bolts, rails, etc.). Sometimes referred to as foot mount. | ||
| Flange | The drive is equipped with integral flanges so that it can be mounted with the use of external hardware (screws, bolts, rails, etc.). | ||
| Other | Other unlisted, specialized, or proprietary configuration. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Features
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| Your choices are... | |||
| Integrated Motor | The "packaged" drive consists of the adjustable speed section and an electric motor. The unit may also include a geared reducer. | ||
| Integrated Gears | The "packaged" drive consists of the adjustable speed section and a geared reducer. The unit may also include an electric motor. | ||
| Continuously Variable | Continuously variable drives and transmissions provide an uninterrupted range of speed ratios, unlike a normal drive or transmission that provides only a few discrete ratios. | ||
| C-flange Adapters | C-flange adapters are supplied for connecting customer supplied motors. | ||
| Hollow Shaft | Output shaft has a hole or bore that can accept a shaft. Outputs with collets for tool bits are one example. | ||
| Speed Feedback | The drive is equipped with speed feedback for indication of the rotational speed of the output shaft. Feedback may be magnetic sensor, tachometer, potentiometer, encoder, or current. | ||
| Reversible | The output shaft can rotate clockwise or counter-clockwise. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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