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Air turbine used in a dental handpiece Correlation between rotational speed and torque Correlation between rotational speed and turbine output power. The turbine is powered by compressed air between 35 and 61 pounds per square inch (~2,4 to 4,2 bar), [1] [2] which passes up the centre of the instrument and rotates a Pelton wheel in the head of the handpiece.
A single-speed Dremel 'MultiPro' electric die grinder. Dremel ( / ˈ d r ɛ m ə l / DREM-əl ) is a multinational brand of power tools , focusing on home improvement and hobby applications. Dremel is known primarily for its rotary tools , such as the Dremel 3000, 4000 and 8200 series, which are similar to the pneumatic die grinders used in the ...
The advantage is a stepless gear ratio (continuously variable speed/torque) and a more flexible control of the gear ratio depending on the load and operating conditions. The hydrostatic transmission is generally limited to around 200 kW maximum power, as the total cost gets too high at higher power compared to a hydrodynamic transmission.
VSD – variable-speed drive; VSI – versatile seismic imager (Schlumberger VSP tool) [32] VSP – vertical seismic profile; VSPRO – vertical seismic profile; VTDLL – vertical thickness dual laterolog; VTFDC – vertical thickness FDC CNL log; VTISF – vertical thickness ISF log; VWL – velocity well log; VXT – vertical christmas tree
Modern drill presses can, however, use a variable-speed motor in conjunction with the stepped-pulley system. Medium-duty drill presses such as those used in machine shop (tool room) applications are equipped with a continuously variable transmission. This mechanism is based on variable-diameter pulleys driving a wide, heavy-duty belt.
The graph above shows the intake runner pressure over 720 crank degrees of an engine with a 7-inch (180 mm) intake port/runner running at 4500 rpm, which is its torque peak (close to maximum cylinder filling and BMEP for this engine). The two pressure traces are taken from the valve end (blue) and the runner entrance (red).
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