One of the manual tools most useful, especially in gas and plumbing installations, the parrot beak clamp It is also known, depending on the region, by other names, such as colorless forceps, adjustable pliers, water pump pliers, multiple pliers or extendable / adjustable jaw and all possible combinations. In any case, all these names refer to the form and / or functions of the tool, which are unique and irreplaceable.
The parrot beak clamp is a variant of the Wrench and belongs to the class of joint pliers, invented and popularized in the United States by the Champion-DeArment Tool Company 80 years ago under the brand name Channellock (name that today designates said company) although in our days, by virtue of its wide use, they also carry the brand of many other manufacturers.
Although later we will see that there are several models, the parrot beak forceps they are generally made up of the following parts:
In the figure above we can see two of the main characteristics that these tools present:
- They have an extremely long handle and short jaws, which guarantee a very pronounced lever action, that is, with little effort, a lot of force is applied to the workpiece.
- As its name indicates, and unlike common pliers, the jaws are adjustable, being able to serve various diameters thanks to the large number of adjustment positions (between 5 and 30, depending on the manufacturer and the size of the tool) without the need for extend the distance between the grips.
The jaws can be smooth or present stretch marks or teeth for a better grip, allowing the parrot beak forceps They can be used to tighten or loosen tubes and nuts, whether they are hexagonal, square or flat connections, clamp and rotate any cylindrical element, from pipes to taps or faucets, split tiles and ceramic, straighten sheets, as well as other applications with difficult access.
How do Parrot Beak tweezers work?
The great advantage of parrot beak forceps It is the possibility of regulating the separation of the jaws to adapt, as we have already expressed, to different sizes. Regulation is achieved through two procedures, as shown in the following figure:
- A joint formed by a series of elongated holes over which an asymmetric axis travels (marked A in the figure above).
- A system of toothed inserts in the two arms of the caliper (marked as B in the figure above).
Although the vast majority of parrot beak forceps present the type of joint detailed in the figure above, called grooved joint or zipperTweezers whose articulation is grooved are also marketed. This type of joint is more convenient because it causes less wear, since it is smooth and the tool is opened by sliding the adjusting screw through that smooth channel. However, the availability of tool and aperture sizes is less than for those that offer a rack joint.
Types of Parrot Beak forceps
In addition to presenting a rack or grooved joint, and the jaws being smooth or toothed, the parrot beak forceps They can be shaped in a variety of ways to provide a better grip depending on how the tool is used. In the table that follows we see some of the most common shapes taking into account the type of jaws.
Improvements made to the Parrot Beak forceps
Some clamps such as the cobra type in the table above incorporate a quick adjustment button system, as shown in the following figure, which makes it easy to change position with a simple push on the button.
Other manufacturers offer parrot beak forceps with automatic adjustment based on the patented system Smart Grip. With this system, no time is wasted adjusting the tool to the correct opening when working with parts of different dimensions, and the task is done with a single movement.
A variant of the system Smart Grip It is the one that incorporates a spring in the clamp, located in a protected way, in order to automatically close the clamp when the button is pressed. This allows the gripper to be operated with one hand.
Like many other tools, the parrot beak forceps isolated, that is, designed for work in hazardous areas, for example, in energized networks and industrial facilities where there are voltages of up to 1000 V in alternating current and 1500 V in direct current.
Most common sizes on the market
As we have seen, the commercial offer of parrot beak forceps it is extremely wide and all variants of this tool come in various sizes. In the following table we detail only the most used sizes of the parrot beak forceps more common (cobra type) and their characteristics.