spur gear

plural spur gears

1. engineeringThe simplest type of gear wheel, with teeth projecting radially, parallel to its axis.

   1 more example

   Each axle has its own final drive two-step reduction, a bevel gear set and a spur gear set which drives the axle. Of these, the spur gears take most of the stress and the bevel gears provide optimum reduction at high speed and low torque—an arrangement which makes for easier assembly and reduced load for the bevel gears.

   1962 June, “Beyond the Channel: U.S.S.R.: A 3,000 h.p. diesel-hydraulic from MaK”, in Modern Railways, page 416

   Synonyms: spur-wheel