GEARS BY PATRICK COMELLA

SPUR GEARS Simple gear, just a disc/cylinder with spikey teeth jutting out from the radius. In spur gears teeth suddenly meet at a line contact across their entire width, causing stress and noise. Spur gears make a characteristic whine at high speeds. Spur gears are used for low speed applications and those situations where noise control is not a problem.

WORM GEARS Screw-like gear. Cylinder with spiraling ridges down the inside. A worm gear is usually meshed with a spur gear or a helical gear The worm can always drive the spur, but if the spur is too small, it cant always push the worm

CROWN GEARS Bevel that looks like a crown Crown gears are a particular form of bevel gear whose teeth project at right angles to the plane of the wheel; in their orientation the teeth resemble the points on a crown. A crown gear can only mesh perfectly with another bevel gear, although crown gears are sometimes meshed with spurs

ROTARY TO LINEAR MOTION Using a gear’s rotation to move a meshed object forward/backward Mechanical linear actuators typically operate by conversion of rotary motion into linear motion. A screw, wheel, and music-box are all linear actuators that convert rotary motion to linear motion