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When 2 shafts are parallel to each other at a certain distance and no gears or belts are to be used then what is the coupling to be used to transmit the motion between the shafts?
Air or fluid pressure... If you put cylinders in the shafts and connect them through pipes or tubes, then you can transfer pneumatic or hydraulic pressure form one to the other. As one cylinder is lowered in one shaft, it will displace the fluid (air being a fluid) and because that fluid would have no escape, it would force the cylinder in the other shaft to rise.
Why are there always two shafts in a coal mine?
safety
Three differences between a drive shaft and a prop shaft?
1) Drive-shafts are used on FWD but Prop-Shafts are used on RWD or 4WD. 2)A Drive-Shaft has final drive via a CV joint but a Prop-Shaft has final drive via a Differential. 3)A Drive-Shaft is smaller, lighter and saves space by not having a transmition tunnel.
What are helicle gears?
helical gears offer a refinement over spur gears. The leading edges of the teeth are not parallel to the axis of rotation, but are set at an angle. Since the gear is curved, this angling causes the tooth shape to be a segment of a helix. The angled teeth engage more gradually than do spur gear teeth. This causes helical gears to run more smoothly and quietly than spur gears. Helical gears can be meshed in a parallel or crossed orientation. The former refers to when the shafts are parallel to each other; this is the most common orientation. In the latter, the shafts are non-parallel. For a crossed configuration the gears must have the same pressure angle and normal pitch, however the helix angle and handedness can be different. The relationship between the two shafts is actually defined by the helix angle(s) of the two shafts and the handedness, as defined: : : Where β is the helix angle for the gear. The crossed configuration is less mechanically sound because there is only a point contact between the gears, whereas in the parallel configuration there is a line contact. Quite commonly helical gears are used with the helix angle of one having the negative of the helix angle of the other; such a pair might also be referred to as having a right-handed helix and a left-handed helix of equal angles. The two equal but opposite angles add to zero: the angle between shafts is zero -- that is, the shafts are parallel. Where the sum or the difference (as described in the equations above) is not zero the shafts are crossed. For shafts crossed at right angles the helix angles are of the same hand because they must add to 90 degrees.
What is the formula for shafts alignment?
just follow this one millwrightmasters.com it will be shown there,,
