Understanding Bearings Used in Aircraft Lifting Tongs and Their Functions

When one is involved in aviation manufacturing and maintenance environments, it is often necessary for professionals to be familiar with how various handling tools can best be used to support the safe movement and positioning of large or sensitive components. Among the many specialized instruments that a technician may encounter in their work, aircraft lifting tongs represent an often overlooked category of hardware, despite their usefulness in maneuvering heavy or awkwardly shaped components during engine changes and structural repairs. As these tools feature moving parts that are reliant on bearings for performance and functionality, having knowledge of the mechanical design of tongs and their reliance on integrated bearings can be useful for maintaining operational safety over time. For this, we encourage customers to read on as we examine the role of bearings used within aircraft lifting tongs more closely to guide procurement teams toward more informed purchasing decisions.

What Are Aircraft Lifting Tongs?

Aircraft lifting tongs are a category of handling tools that provide a means to grip, lift, and position heavy components during aviation manufacturing and maintenance. Typically configured in a scissor-style form, these tools apply controlled force through the use of opposing arms. With this basic role, they are prevalent across production facilities and MRO environments, where careful handling is necessary to preserve part integrity and maintain positional control. To support such operations, aircraft lifting tongs are generally composed of several interconnected elements, each of which contributes to the assembly’s overall handling capability. While exact designs may vary, the core elements of these tools will include:

Interconnected Arms: The arms of tongs serve as the primary structural members that form the scissor-like mechanism that opens and closes to engage components during lifting.
Pivot Joints: Located at the connection points between arms, pivoting joints permit articulation within an assembly as force is introduced and redistributed.
Gripping Ends: Positioned at the outer edges of the assembly, gripping ends are the contact surfaces that engage directly with a handled component.

How Bearings Function Within Aircraft Lifting Tongs

During maintenance and servicing operations, aircraft lifting tongs in use will be expected to respond to changing weight distribution and positional adjustment in a predictable manner, allowing each stage of movement to follow an intended path for safety. As the arms shift to grip, lift, and release components, bearings are what will support motion at connection points and joints, ensuring that adjustments occur in a controlled and consistent manner. To better understand the role of bearings in tool operation, it is useful to look at their specific functions. Generally speaking, this will include:

Smoothing Pivoting Motions: As the tong arms are opened and closed, bearings support motion at joints for articulation to occur without excessive resistance. This helps the assembly maintain a more controlled grip during lifting and prevents hastened wear.
Force Path Stabilization: As weight is placed on lifting tongs, bearings will help maintain a defined path for load distribution. This is essential for preventing irregular mechanical responses within the structure, as well as for mitigating the general risk of failure.
Motion Consistency: As lifting operations are repeated throughout continued service, bearings will prove essential in maintaining uniform movement behavior and deterring uneven wear.

What Types of Bearings Support Lifting Tongs?

The selection of bearings for lifting tongs is typically dictated by the specific directional loads and environmental factors the tool will be expected to encounter in maintenance operations. Thus, designers must choose between various bearing types to ensure all pivot points can reliably handle the weight of a secured component and the lateral forces exerted during the gripping process. For most equipment, the most popular options will include:

Heavy-Duty Plain Bearings: Plain bearings are common for high-load pivot points, where heavy-duty variations can offer a large contact area to handle significant compressive forces while maintaining a slim profile.
Spherical Plain Bearings: More spherical plain bearings will be sought out for tongs that experience slight misalignments, allowing for multi-directional movement to be achieved while upholding support for heavy radial loads.
Needle Roller Bearings: Employed in compact joints where high load capacity is required within a restricted diameter, needle roller bearings offer high-efficiency rotation abilities for the benefit of smaller components.
Thrust Bearings: Specifically integrated into the top swivel or rotating attachment points, thrust bearings can facilitate full rotation of loads while under tension.
Sealed Ball Bearings: Used in secondary articulation points to prevent the ingress of dust and metallic shavings, sealed ball bearings are often sought out for upholding consistent performance with minimal maintenance over time.

Source Bearings for Aircraft Lifting Tongs Through a Reliable Procurement Channel

As we have shown in this blog, bearings are highly beneficial for the performance and reliability of aircraft lifting tongs. Whether you are a professional currently searching for lifting tong tools to support your own maintenance activities or are in the market for reliable bearings, look no further than ASAP Axis for your fulfillment needs. As an ASAP Semiconductor purchasing platform, we provide dependable sourcing support that is backed by our AS9120B, ISO 9001:2015, and FAA AC 00-56B accreditation. With all that we aim to provide as your purchasing partner, be sure to explore our selection of tongs, bearing parts, and other aviation solutions today and submit an RFQ for service.