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How can gears change the size and direction of a force?

Gears change the size of a force by varying the number of teeth on the gears in contact. Larger gears transmit force over a larger area, reducing the pressure and increasing the force. Gears can change the direction of a force by meshing at an angle, causing the force to transfer to the desired direction.


What is a crown and pinion?

a crown and pinion is a st of gears that mesh at an angle.


Why are helical gears more favourable than spur gears?

bevel gears are used for power transmitting between the shafts which intersect at some angel ( usually right angel) , but the spur gear is used for shafts which are parallel and coplanar.


What is pressure angle?

The pressure angle in gear design refers to the angle between the line of action (the line along which the force is transmitted between meshing gear teeth) and a line perpendicular to the pitch circle, which represents the theoretical path of motion. It is a critical parameter that influences the shape and strength of the gear teeth, affecting how they mesh and transmit power. Common pressure angles in gears are 20 degrees and 14.5 degrees, with the higher angles generally allowing for stronger teeth but potentially increasing the risk of wear and noise.


Why do bike gears slip under pressure?

Bike gears can slip under pressure due to a few reasons, such as worn-out gear teeth, improper gear alignment, or a loose chain. When these issues occur, the gears may not engage properly, causing them to slip when pressure is applied, leading to a loss of power and efficiency in pedaling.


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 significance of blood pressure ratios?

80/120mm of Hg is the normal pressure


How do you change the camera angle on gears of war 2 Xbox360?

i think there is no posibility to change it.


How do cranks work?

if you put downward pressure on the handle it causes gears to move


What is the difference between spur gears and other gears?

Spur gears are cut with straight teeth. They can only transmit rotation between parallel shafts, and are relatively economical. Bevel gears have teeth cut on an angle. They transmit rotation between non-parallel shafts. Helical gears have curved teeth. They are generally quieter than spur gears, but are generally more difficult to make and more expensive.


What is the significance of using a 1 2 link chain in bicycle gears?

Using a 1 2 link chain in bicycle gears is significant because it allows for smooth and efficient shifting between gears, resulting in better performance and a more enjoyable riding experience.


Where are bevel gears used?

They are used when the angle of rotation needs to be changed. The rotation of a vertical rod can be changed to rotation of a horizontal rod by the use of beveled gears. <><><><><> bevel gears ARE two the wheels together or just two two wheels so pretty much you can find bevel gears in objects like .... can opener cars in a hand drill.. and many more