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The tooling process occurs within a variety of different industrial fabrication settings. Manufacturers often rely upon devices intended to assist the production process during tooling, such as jigs, fixtures, templates, patterns and dyes. Devices called “pins” help companies couple work pieces by aligning, fastening or otherwise joining them together.


About Industrial Pins

Modern manufacturing enterprises depend upon a wide variety of metal fasteners and pins. These useful devices perform functions which may range from permanently securing two or more components together to helping two items placed in alignment maintain position for variable periods of time. The constituent pin materials and the design of a fastening system sometimes vary widely.


Principles of Industrial Pin Design

Inventors have developed a variety of industrial pins to perform different types of coupling and fastening tasks. While some pins serve a temporary fastening function, other pins provide enduring fastening capabilities. Ultimately, the best design may depend upon the pin’s intended purpose. Certain pins, such as Spirally Coiled Spring Pins, offer flexibility in the wake of heavy use. Others, e.g. Shear Pins, perform limited yet highly specific coupling tasks.


Types of Industrial Pins

Inventors have created a number of different types of pins to assist manufacturers in performing specific fabrication and assembly tasks. Pins may perform coupling tasks as versatile as helping secure a drill blade in place during operation, or join two dissimilarly-shaped constituents within an assembly. Some of the most popular types of pins today find wide application in many industries:

Mechanical Fasteners: A multitude of devices help create semi-permanent couplings of industrial components. Some, such as screws, typically rely upon threads to help accomplish this goal. Manufacturing companies today rely upon hundreds of unique fastening systems, some of them in the public domain and other proprietary in nature.

Dowel Pins: Typically utilized in conjunction with adhesives, Dowel Pins formed from wood or metal permit manufacturers to affix assembled components securely within pre-drilled holes.

Groove Pins: A specialized form of Dowel Pin consisting of solid pins containing specifically-sized longitudinal grooves, Groove Pins enjoy widespread popularity. Manufacturers can join items with these pins by sliding the pin into a pre-drilled hole containing a projection designed to insert longitudinally inside the groove. Hammers or hydraulic presses permit the forcible insertion of Groove Pins into place. Usually stronger than Spring Pins, these pins perform a variety of applications. For example, they may serve as a fulcrum pin in nozzles of sprinklers.

Solid Cylindrical Pins: Cylindrically shaped solid pins, these types of fasteners frequently help hold machinery in correct alignment. For example, a Solid Cylindrical Pin may fit inside a drilled slot in order to secure a removable drill bit.

Solid Tapered Pins: These solid cylindrical pins taper uniformly on one end. They play a useful role in many furniture assemblies since they will insert easily with the application of pressure.

Spring Pins: These pins, sometimes called “tension pins”, will expand during use in order to fit snugly within a pre-drilled cavity. The pressure of the compressed sides of the pin against the wall of the hole allow the Spring Pin to remain in place.

Spirally Coiled Spring Pins: These metal pins invented in the late 1940s consist of coiled spring surrounding a hollow interior. They remain flexible under the stress of shifting loads and have been widely used in automotive vehicle door handles.

Slotted Spring Pins: These fasteners consist of hollow cylinders of metal containing a single longitudinal slot along one side. The pin will compress to permit an operator to slip it into a pre-drilled hole of a slightly smaller circumference than the pin; once installed, the walls of the pin continue pressing against the sides of the hole.

Clevis Pins: Manufacturers designed these removable pins to help secure two items together in conjunction with a Cotter Pin. The Clevis Pin contains a head resembling a nail head on one end. The other end of the pin contains a drilled hole extending through the width of the pin. A Cotter pin will insert inside the hole through one prong.

Cotter Pins: These fasteners bend to form two straight metal prongs extending outwards from around a central circle; the central part fits temporarily inside the hole of a Clevis pin. Manufacturers frequently refer to Cotter Pins as “split pins”. Some split pins will function as fasteners independently of a Clevis Pin. For example, manufacturers have developed split pins which will remain permanently in place when the tines separate after a hammer pounds the circular head of the pin.

Shear Pin: This type of industrial pin contains a lower segment specifically designed to snap away or “shear” off under the strass of movement. This type of pin can prevent some machines from functioning until an initial operator applies sufficient pressure. It also helps protect the integrity of some machines during accidents by allowing an expendable portion of the assembly to shear off cleanly.


Advantages of Industrial Pins

Industrial pins supply variable advantages. Manufacturers must carefully consider the purpose of a coupling in order to select the best pin or industrial fastening system. Many attractive pin choices exist on the market today.

One important advantage of most industrial pins involves the ability to maintain two items within a desired alignment. This benefit expedites the process of assembling products using different drill bits, for instance. A second important benefit of industrial pins relates to an enhanced ability to join parts together reliably on a temporary (or permanent) basis. Different pin selections accommodate variable fastening time frames.


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From a contract manufacturing firm, BuntyLLC evolved into a full service custom machined, forged and cast metal parts fabrication enterprise. We supply global solutions from our headquarters in Greenville, South Carolina.

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