Pivot Pin
Pivot Pin - Related Videos
07:17
Pilot Testing
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2023
Source: Laboratories of Gary Lewandowski, Dave Strohmetz, and Natalie Ciarocco—Monmouth University In any experiment researchers have the challenge of creating experiences for participants that are consistent (i.e., reliable) and authentic (i.e., valid). Yet there are many ways to manipulate any one variable. For example, if you want participants to feel sad, you can have them think of their own sad memory, watch a sad video, or read a sad story. Researchers must find the best way to...
01:21
Euler's Formula for Pin-Ended Columns
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2024
In structural engineering, the stability of columns under compressive axial loads is a critical consideration, described as buckling. A typical example involves a column PQ, which is pin-connected at both ends and subjected to a centric axial load F applied at one end, with a reaction force of F' = -F at the other end. Here, it is crucial to understand that when an applied load exceeds the critical load, buckling occurs as the system becomes unstable. To calculate the critical load, envision...
01:21
Pilot and Numeric Relaying
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2024
Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying: Pilot Wires: These are separate electrical circuits operating at DC, 50 to 60 Hz,...
03:57
Transverse Fracture of the Mouse Femur with Stabilizing Pin
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Cited by 3 •
2021
This protocol describes a method to perform fractures on adult mice and monitor the healing process.
10:39
Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
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2018
A microfluidic channel with deformable sidewalls offers flow control, particle handling, channel dimension customization and other reconfigurations while in use. We describe a method for fabricating a microfluidic channel with sidewalls made of an array of pins that allows their shape to change.
FAQs
Design starts by matching pin diameter and material to the expected mechanical loads and motion. Diameter affects the component’s resistance to shear, bending, and bearing forces, while material selection influences strength and wear behavior. Engineers must also consider repeated loading, because an adequate initial design can still develop wear or excessive play if operating conditions are not addressed.
Bushings provide the controlled contact surface around the pin, helping maintain alignment as one connected member rotates. Surface finish and lubrication influence friction and wear at this interface. If these factors are poorly matched, contact can deteriorate, producing more resistance to motion and increasing clearance. Specifying the pin, bushing, finish, and lubricant together supports smoother operation and longer service life.
Alignment is a central design requirement because the pin passes through aligned holes or bushings. Accurate alignment keeps the rotational axis properly located and helps distribute contact forces rather than concentrating them unevenly. Retention also matters: the pin must remain in its intended position while the mechanism operates. These considerations limit unwanted movement and help preserve dependable linkage motion under repeated loads.
Installation begins by aligning the connected members’ holes or bushings so the pin can establish the intended axis without forcing the assembly. The specified fit, surface finish, and lubrication condition should then be checked, followed by confirmation that the pin is properly retained. After assembly, verify that rotation is smooth and that the connection has no excessive play.
Maintenance focuses on conditions that directly affect motion and load transfer. Inspecting for excessive play can reveal wear or loss of alignment, while checking lubrication and the pin’s surface finish helps address friction at the rotating interface. Corrective attention is especially important in mechanisms exposed to repeated loading, where deterioration can undermine alignment, smooth motion, and service life.
Pivot pins are relevant to hinges, suspension systems, lifting mechanisms, construction equipment, and machine linkages. In each case, the engineering objective is to preserve controlled relative rotation while carrying the loads transmitted through the connection. Design priorities can shift with the application, but diameter, material, finish, lubrication, alignment, and retention remain central to dependable operation.