While performing locksmithing tasks, the locksmith often encounters the issue of rusted fasteners. Attempting to unscrew them with a regular screwdriver or applying WD-40 to remove the rust may not always be successful.
These fasteners can be tight, causing the tool to slip or potentially damage it. Steel bolts, in particular, present a challenge when trying to remove them from a metal surface. Rust acts as a strong adhesive, making it extremely difficult to unscrew the fastener.
Fortunately, there is one tool that can easily handle such bolts – an impact screwdriver. With this tool, even the most difficult problem becomes a minor inconvenience that anyone can overcome.
Impact screwdriver: what it means, principle of operation
The impact screwdriver distinguishes itself from a regular screwdriver with its robust and reinforced body crafted from durable and high-strength metal. It is accompanied by a selection of bits, including flathead and Phillips bits, which can be installed in the same manner as those on a regular screwdriver.
Additionally, the impact screwdriver features a unique component, a torsion regulator, which grants it the ability to be reversible. This particular tool was highly popular during the Soviet era. However, during that time, it possessed a more simplistic design with a solid core instead.
After a period of time, the tool went through a slight modification and was equipped with a hexagon that is placed near the stinger. In certain models, it can be installed on the handle. Thus, these screwdrivers have the capability to transmit rotational force from the wrench.
Previously, older models were only operable by two individuals: one person would strike the handle while the other would rotate the fastener. The modernized version is an adapted tool that can handle any type of bolts. It is convenient to work with and can be operated by a single person.
In the current versions, the striking and turning mechanism is housed within the handle, and the stinger is attached to the gear. Rotation initiates when the impact force of a heavy object (typically a hammer) is applied to the handle.
If you require to secure the bolt, you can perform the same procedure but in reverse order, that is, rotate the fastener with a regular screwdriver, but not fully, and then place an impact tool and employ a hammer to secure the bolt or screw completely.
Note! If you intend to fasten the fastener with an impact tool, never fully tighten it with a regular screwdriver. Doing so may cause damage to the body or the surface of the area where the screw is inserted due to the impact.
Characteristics of the tool
If you are seeking to purchase an impact screwdriver, it is essential to have a thorough understanding of the tool’s key technical characteristics and specific model options.
Take note of the material used in its construction. Reputable companies never compromise on the quality of steel employed. However, it is not uncommon for products from China to be manufactured using low-grade metal. Thus, it is advisable to steer clear of counterfeit products, as they are prone to deformation or complete disintegration upon initial impact.
Furthermore, another crucial factor to consider when making a purchase is the inclusion of a reverse function. The presence of this feature significantly enhances the screwdriver’s core functionalities, enabling you to both tighten and loosen fasteners.
The device of the handle is another crucial aspect to consider. Its primary function is to securely hold the tool and allow for effective striking. If the handle has a specialized pad, such as rubber, polyurethane, or polyethylene, it will provide a better grip during blows. Additionally, if the pad has a raised area, it will further enhance safety during operation.
In most cases, the handle size can vary, and there are a few important points to note:
- A standard-sized handle offers high strength but may not be suitable for use in tight spaces.
- A slightly smaller handle than the standard size can be used in extreme conditions and confined spaces, but its reliability may be compromised.
When selecting an impact screwdriver, carefully consider the advantages and disadvantages before making your purchase.
- chuck holder;
- universal accessories.
The set is packed with a variety of accessories designed for various types of slits and hexes. It’s crucial to prioritize the quality of these elements when making a purchase, as it directly affects the tool’s reliability and durability in the long run.
Advantages and disadvantages of the tool
- Before starting, clean the fastener from rust using a cloth. You can also apply WD-40 or kerosene for 5 minutes.
- Secure the stinger with a pin, making sure it is positioned perpendicular to the fastener’s head.
- Using a heavy object, strike the end of the handle with moderate force.
- Repeat the strikes until the screw or its head moves slightly to the side.
- Finish the unscrewing process using a regular screwdriver.
If your impact screwdriver has a reverse function, switch it to the screwdriving mode, make a few strokes, and then switch it back to unscrewing. This will help remove any rust particles from the fastener’s spiral.
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