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A sailor checks the outside diameter of a shear pin in the machinery repair shop aboard US aircraft carrier John C. Stennis. A shear pin is a mechanical detail designed to allow a specific outcome to occur once a predetermined force is applied. It can either function as a safeguard designed to break to protect other parts, or as a conditional ...
Both mines were armed and disarmed using a brass arming key. The mine is triggered by downward force of greater than 110 pounds on the pressure plate, which pushes the upper fuze assembly downwards. This compresses nine coil springs and shears two brass shear pins.
A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet. Typically made of thick wire with a half-circular cross section, split pins come in multiple sizes and types.
This shock can induce certain components such as plugs to lock into place and then unlock for retrieving. Jars are commonly used to shear small brass or steel pins that are put in place to function certain down-hole tools at a certain moment. The operator can use the jars to shear the pins at a predetermined depth.
Hollow spring pins provide a weaker shear strength than a solid dowel pin, and the strength may be varied by varying the wall thickness. This limited shear strength specification is designed to sustain normal operation, but then give way in the event of excessive shaft torque, thus protecting the rest of the machine from damage.
A torque limiter may limit the torque by slipping (as in a friction plate slip-clutch), or uncouple the load entirely (as in a shear pin). The action of a torque limiter is especially useful to limit any damage due to crash stops and jams. Torque limiters may be packaged as a shaft coupling or as a hub for sprocket or sheave.
Other types of nails include pins, tacks, brads, spikes, and cleats. Nails are typically driven into the workpiece by a hammer or nail gun. A nail holds materials together by friction in the axial direction and shear strength laterally. The point of the nail is also sometimes bent over or clinched after driving to prevent pulling out.
The bible [1] is the part of a pin tumbler lock that contains the pins and pin stack springs as well as the pin stacks themselves. The driver pins of a pin-tumbler lock are located in the bible. Bit The section of a key which enters a lock, which has the key cuts formed in it and which engages the bolt or tumblers of the lock.
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