Hurter

noun

1. One who or that which hurts.
2. Milit.: A beam placed at the lower end of a platform to prevent the wheels of a gun-carriage from injuring the parapet.
3. A wooden or iron piece bolted to the top rails of a gun-carriage, either in front or in the rear (in the latter case called a counter-hurter), to check its motion.
4. In a vehicle: The shoulder of an axle, against which the hub strikes.
5. A reinforcing piece on the shoulder of an axle.