Definition

1. Noun:
   • A type of gear with straight teeth cut parallel to the gear's axis: A "spur gear" is a cylindrical gear with teeth that are straight and aligned parallel to the axis of rotation. These teeth mesh with the teeth of another spur gear on a parallel shaft.

Usage

• Noun:
  • The simplest and most common type of gear is the spur gear.
  • For this simple transmission, we will use two spur gears.
  • Spur gears are used to transfer motion between parallel shafts.

Examples

• Noun:
  • The clock mechanism uses a series of small spur gears.
  • A common example of a spur gear is found in a manual can opener.
  • The design requires a spur gear with 24 teeth.

Advanced Usage

• Engineering Context: In mechanical engineering, "spur gear" specifies the gear type, often in contrast to helical, bevel, or worm gears. Their simplicity makes them cost-effective for many applications.
  • The noise level is higher for spur gears compared to helical gears.

Variants and Related Words

• Spur wheel: An older or less common term synonymous with "spur gear."
• Spur gearing: (noun) A system or assembly that uses spur gears.
  • The machine uses simple spur gearing.
• Spur pinion: A small spur gear, often the driving gear in a pair.

Synonyms

• Spur wheel (archaic/technical variant).
• Straight-cut gear (descriptive synonym emphasizing tooth geometry).

Related Phrases

• Spur gear train: A series of two or more spur gears transmitting motion.
  • The speed was reduced through a three-stage spur gear train.
• Spur gear design: The engineering process of creating spur gears.
  • The course covers the fundamentals of spur gear design.

Noun

1. gear wheels that mesh in the same plane