Which gear type is typically used to transmit motion between intersecting axes?

Which gear type is typically used to transmit motion between intersecting axes?

• A. Spur gear
• B. Helical gears
• C. Bevel gears
• D. Worm gears

Answer: (C)

When two shafts cross, you need gear teeth that match on a conical surface so they can mesh properly as the axes intersect. Bevel gears are cut on a cone, so their teeth mesh with another bevel gear when the shafts meet at an angle. This lets power transfer between intersecting axes and also allows changing the direction of rotation and the angle between shafts. Straight bevel gears handle simple 90-degree changes, while spiral bevel gears offer smoother operation at various angles. Spur gears and helical gears are for parallel shafts, so they don’t suit intersecting axes, and worm gears involve perpendicular axes in a non-intersecting arrangement. That’s why bevel gears are the type used for intersecting axes.

When two shafts cross, you need gear teeth that match on a conical surface so they can mesh properly as the axes intersect. Bevel gears are cut on a cone, so their teeth mesh with another bevel gear when the shafts meet at an angle. This lets power transfer between intersecting axes and also allows changing the direction of rotation and the angle between shafts. Straight bevel gears handle simple 90-degree changes, while spiral bevel gears offer smoother operation at various angles. Spur gears and helical gears are for parallel shafts, so they don’t suit intersecting axes, and worm gears involve perpendicular axes in a non-intersecting arrangement. That’s why bevel gears are the type used for intersecting axes.