SPUR GEAR is used when shafts (white) must rotate in the same plane. The teeth are straight and parallel to the shaft. The pinion (yellow) is the smaller of a gear pair.

INTERNAL GEAR allows the pinion (yellow) to rotate on the inside of a ring type gear with straight teeth on its inner surface. This is a type of spur gear in which both the pinion and the gear turn in the same direction, unlike ordinary spur gears.

HELICAL GEAR has curved teeth at an angle to the shaft. These teeth grip with less noise than straight teeth, especially when they are turning at high speeds.

HERRINGBONE GEAR has teeth that are V-shaped, like a double helical gear. The shafts rotate in opposite directions as in an ordinary spur gear.

BEVEL GEAR has teeth that slope along one surface of the disc. The pinion (yellow) rolls at an angle to the top of the gear, not along its edge. This type of gear is used when the shafts to be turned meet at an angle.

WORM GEAR has a screw pinion (the worm) which turns along a spur gear. Motion can be transmitted between shafts that are at right angles.

PLANETARY GEAR is a system whereby PLANET spur gears turn on a central SUN gear and an internal ring gear. This system is used in automatic cars.

124 gears 132 gears 148 gears afx gears atlas gears aurora gears bevel gears brass gears cox gears crown gears drive gears ho gears marchon gears nylon gears parma gears pinion gears revell gears spline gears tjet gears tyco gears worm gears

Slot Car Gears Technical Information