What is the definition of "shear pin"?
A cylindrical pin made from a relatively soft material that is designed to shear and break from excessive damaging shocks or loads. The shear pin breaks to preserve the rest of the assembly.

Learn more about shear pin in the class Overview of Non-Threaded Fasteners 125 below.


Fasteners Training


Class Information
Tooling U-SME classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:Overview of Non-Threaded Fasteners 125
Description:This class summarizes the various types of non-threaded fasteners used in assemblies and describes their common applications.
Prerequisites: none
Difficulty:Beginner
Number of Lessons:13
Language:English, Spanish
 
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Class Outline
  • Objectives
  • Advantages of Non-Threaded Fasteners
  • Semi-Permanent Pins
  • Types of Semi-Permanent Pins
  • Clevis Pins and Cotter Pins
  • Quick-Release Pins
  • Keys and Keyways
  • Types of Keys
  • Snap Rings
  • Types of Snap Rings
  • Rivets
  • Types of Rivets
  • Summary
  
Class Objectives
  • List the major types of non-threaded fasteners.
  • Describe the characteristics of dowel pins.
  • Identify types of semi-permanent pins.
  • Describe the characteristics of an assembly using clevis and cotter pins.
  • Describe the characteristics of push-pull pins.
  • Describe the characteristics of keys.
  • Identify types of keys.
  • Describe the characteristics of snap rings.
  • Identify types of snap rings.
  • Describe the characteristics of rivets.
  • Identify types of rivets.

Class Vocabulary

Vocabulary TermDefinition
axially assembled snap ring A snap ring that is assembled by fitting the ring over the end of a shaft or through the opening of a hole.
axis An imaginary straight line that passes through the center of an object.
bar key A long rectangular device with parallel sides and precise dimensions that is inserted into a matching keyway and key slot. Bar keys are typically used to assemble gears, handles, wheels, or similar components onto a shaft.
blind rivet A type of rivet with a tubular shank that is installed with access to only one side of the part. Blind rivets are generally used to simplify assembly and to improve appearance.
burr A rough, sharp edge remaining on a part after machining or stamping. Burrs pose an injury risk and interfere with the fitting of parts.
chamfer A small angled surface added on the end of a shaft, around the opening of a hole, or along an edge. A chamfer removes the sharp edge and helps remove burrs.
clearance fit Assembled into a matching hole with a slightly larger diameter to allow for easy joining or removal.
clevis pin A cylindrical pin with a head at one end and one or more holes running through the diameter. A clevis pin is typically locked in place with a cotter pin to provide motion between components where great accuracy is not required.
cotter pin A pin with two ends originally positioned together that are fitted through a hole and then bent backwards to lock the pin in place. Cotter pins can be used to lock clevis pins or certain styles of washers.
dowel pin A solid, cylindrical semi-permanent pin mainly used to locate machine parts in a fixed position or to maintain alignment. Dowel pins are the most basic pins.
fastener A device that holds two or more objects together. A fastener is a bolt or a screw, or even a button or a zipper.
gib-head key A device similar to a standard bar key, except with a head at one end that extends above the top surface of the key.
key A rectangular metal component with parallel sides and accurate dimensions. The key is inserted into a matching keyway and key slot to assemble gears, wheels, and other components onto a shaft.
key slot A rectangular groove running parallel to the axis of a shaft that is designed to be assembled with a key.
keyway A rectangular groove inside the hole of a gear, wheel, or similar component that is designed to be assembled with a key.
large rivet A type of rivet with a solid shank and a diameter of 0.500 in. or more. Large rivets are mainly used for structural work on buildings, bridges, or tanks.
non-threaded fastener A type of fastener that does not contain threads. Common types of non-threaded fasteners include pins, retaining rings, and rivets.
nut A metal block with a threaded hole that mates with a bolt. The outer shape of a nut is often six-sided.
pin A thin, often straight, cylindrical non-threaded fastener used to secure the position of two or more machine parts.
press fit Assembled into a matching hole with a slightly smaller diameter through the use of force.
punch A metal tool with an end that can be hammered that is used to either indent material or aid in removing components.
push-pull pin A quick-release pin with a button that is pressed to retract locking balls on the opposite end that hold the pin in the mating component.
quick-release pin A type of pin that is generally used for the manual assembly and disassembly of rigid machine components. Quick-release pins include push-pull pins.
radially assembled snap ring A snap ring that is assembled by fitting the ring onto a shaft from the side. Radially assembled snap rings cannot be assembled into a hole.
retaining ring A flat, circular, non-threaded fastener with a hollow center and an open section. Retaining rings provide a shoulder and can be inserted onto a shaft or inside a hole with an internal groove.
rivet A type of non-threaded fastener that consists of a shank and a head made of deformable material. Rivets are inserted through holes, and the shank is formed into a matching head on the other side of the part.
self-locking ring A snap ring with small prongs around its circumference that grip into the mating part.
semi-permanent pin A type of pin that requires pressure, force, or tools for installation or removal. Semi-permanent pins include straight pins, taper pins, cotter pins, and clevis pins.
shear force A force that attempts to cause the internal structure of a material to slide against itself.
shear pin A cylindrical pin made from a relatively soft material that is designed to shear and break from excessive damaging shocks or loads. The shear pin breaks to preserve the rest of the assembly.
small rivet A type of rivet with a shank diameter of less than 0.500 of an inch. Small rivets are often used in the sheet metal and aircraft industries.
snap ring A flat, circular non-threaded fastener with a hollow center and an open section. Retaining rings provide a shoulder and can be inserted onto a shaft or inside a hole with an internal groove.
spiral-wound ring A snap ring consisting of a strip of metal that is coiled back onto itself.
spring clip A simple device made from soft, bendable material that expands to fit over a shaft.
spring pin A hollow cylindrical pin with an open slot along the pin's length that allows the pin to compress and fit into a smaller hole.
spring steel A high-carbon steel that exhibits excellent strength and is used to make springs and other similar components.
stamped ring A snap ring made from sheet metal, with a relatively flat design.
straight pin A solid, cylindrical semi-permanent pin mainly used to locate machine parts in a fixed position or to maintain alignment. Straight pins are also referred to as dowel pins.
taper pin A semi-permanent, cylindrical pin that has a slight taper along its length. Taper pins are often used on parts that require frequent assembly and disassembly.
tapered key A device similar to a standard bar key, except with a top surface that tapers and gradually decreases in size along its length.
threaded fastener A type of fastener that contains threads. Bolts, screws, and nuts are examples of threaded fasteners.
through hole A hole that begins on one side of a workpiece and extends through and exits another surface of the workpiece.
torque A force that attempts to twist or rotate material.
Woodruff key A device with a flat top, flat sides, and a semi-circular curved bottom. Woodruff keys are used to assemble components on a shaft by fitting into a matching curved key slot.