One of the mysteries of the English language finally explained.
A gearwheel with teeth projecting parallel to the wheel's axis.
- ‘A two-stage spur gear transmits torque between the servomotor and the plasticizing screw.’
- ‘Through sets of worm gears driving spur gears (which lock up when forces try to drive them in reverse), it consistently delivers the most torque to the slowest-rotating axle.’
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