AS9120B, ISO 9001:2015, and FAA AC 0056B ACCREDITED

What Are Bell Cranks & How Do They Work?

A simple mechanical component, bell cranks find many uses within commercial industries, including those pertaining to aircraft, automobile, and architectural construction. A specific crank that allows motion along an angle, bell cranks are commonly manufactured to operate with a 90- or 180-degree angle, but can ultimately be designed with an angle ranging from 0 to 360 degrees. For insight into bell cranks of various kinds and the mechanisms they are used for, we will briefly highlight some of the applications they serve.

When integrated into aircraft, specifically lightweight vehicles, equipment like the rudder are designed with a bell crank, that of which allows the rudder to pivot along its hinge to influence yaw when instigated by the pilot. Moreover, they also serve the purpose of linking and connecting other pilot controls found in a cockpit to maneuver flight control surfaces and control the vehicle’s trajectory during takeoff, landing, and in-flight operations. 

Regarding the large-scale, commercial manufacturing of bell cranks for bicycles, companies of this sort can quickly and easily manufacture such components which facilitate the movement of a pushrod that cycles at an angle to select epicyclic gears. Driven by a bike’s rear sprocket affixed to a bell crank, upon shifting into gear when pedaling, the pushrod will move upwards or downwards to accommodate the desired change in an individual’s workout to promote a comfortable riding experience. In turn, this also affects the rider’s traveling speed depending on their path’s change in elevation by adding or reducing applied force.

Used for the assembly of moving automotive parts, bell cranks are essential as they permit the transmission of one direction of movement into another. In addition, similar to when they are affixed in tandem with aircraft control systems, bell cranks are used as a part of the linkage connecting the throttle pedal to the carburetor, and the brake pedal to the master brake cylinder. When either one of the pedals is depressed, this action is made possible through the installation of a bell crank. Because of how they make angular rotation possible, such items are also feasible alternatives to certain suspension equipment due to their efficient translation of motion between vertical and horizontal movement.

If routine maintenance demands the replacement of a bell crank, bell crank lever, or other aircraft control system component like aileron controls, then Fulfillment Domain is here for home. Owned and operated by ASAP semiconductor, Fulfillment Domain is home to over 2 billion new, used, obsolete, and hard-to-find components catering to a wide selection of industry verticals. We invite you to browse our online catalogs at your leisure, and upon finding a component which satisfies your operational needs, submit an Instant RFQ to begin the purchasing process. Within 15 minutes or less upon receipt of a completed form, our dedicated account representatives will utilize their market expertise to deliver you a customized quote for your comparisons. For further service inquiries, give us a call or email today; we are available 24/7x365.


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