Our hands are two incredible tools attached to our body. Each hand consists of 29 bones connected by 34 muscles and other connective tissue. We have a dominant hand that performs most of our daily tasks with the support of the non-dominant hand. All hand structures work in balance to form a fist or a powerful grip.
A hand tool is any tool that works with the hand instead of a motor.
Hand toolcategories include wrenches, pliers, cutters, files, tapping tools, perforated or hammered tools, screwdrivers, presses, tweezers, scissors, metal saws, drills and knives. Hand and power tools are a common part of our daily lives and are present in almost every industry. These tools help us to easily perform tasks that would otherwise be difficult or impossible.
However, these simple tools can be dangerous and can cause serious injury if used or maintained improperly. Special attention needs to be paid to the safety of hand and power tools to reduce or eliminate these hazards. Hand tools including, but not limited to: shovels, gloves, spikes, measuring tape, buckets, wheelbarrow, heat gun, mallet, thermometers for concrete and asphalt, board with clips, calculator, pin notebook, as appropriate for the work of the requested field personnel. Hand tools such as shovels, gloves, picks, measuring tape, buckets, wheelbarrow, heat gun, mallet, thermometers for concrete and asphalt, board with clips, calculator and pin book.
Hand tools are not machines and refer to those items that are primarily operated by the operator, for example,. Scissors, shears, staplers, labeling guns and tape dispensers. Hand tools, such as wire brushes, scrapers, or impact devices (hand hammers or electric chisels) should be used to remove stratified rust and rust from the package. Hand tools and manual permeability testing procedures will be used to confirm the performance of the BMP.
Online tool means an electronic service provided by a custodian that allows the user, in an agreement other than the terms of service agreement between the custodian and the user, to provide instructions for the disclosure or non-disclosure of digital assets to a third person. Printed materials are all the illustrations and mechanical elements that appear on the PlayStation Disc disc label related to any of the Licensed Products and in or within any Licensed Product Packaging, as well as all instruction manuals, linings, inserts, trade dress and other information. of the user who is inserted in the Package. “Development Tools” means development kits, programming tools, emulators and other materials that may be used in game development under this Agreement.
The licensed software includes bug fixes, updates, upgrades or new versions, and any delivery that must be delivered under a maintenance or service contract (p. ex. Manufacturer means the person or body responsible to the approval authority for all aspects of the type approval process and for ensuring production compliance. It is not essential that the person or agency be directly involved in all stages of the construction of the vehicle, system, component or separate technical unit that is the subject of the approval process.
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Access to this website will not be available during this time. The design of the tool (weight, shape, adaptation to the user and the task), the design of the workstation (size, shape and layout) and the way tasks are programmed are key factors in making the use of hand tools safe and risk-free. An effective prevention strategy must address all aspects at the same time. It's also important that the center of gravity is aligned with the center of the hand that grips it.
In other words, tools must be easy to hold, either in an upright position or in the position in which they will be used (i.e.,. For example, exercises that weigh a lot on the front will require effort (especially on the wrist and forearm) to stay in a useful position and should be avoided. The exception to this principle is an electric hand tool, such as a grinder, which must be heavy to reduce the force that the worker has to exert while using it. With the exception of tools for precision work (for example,.
The belief that smaller tools should have smaller handles, while larger tools have handles, is debatable. Tools with bent or angled handles or tools with pistol grips are useful when the force is exerted in a straight line in the same direction as the stretched forearm and wrist, especially when the force must be applied horizontally (see Figures 2, 3,. Tools with straight handles are for tasks where force is exerted perpendicularly to the stretched forearm and wrist, for example, when force must be applied vertically. Molded tools, such as tools with a bent handle, are effective when most tasks are performed in the same plane and height as the arm and hand, and when only one or two other tools are used (see figure).
Knowing the tasks and design of the workplace where they will be used is vital to selecting the right tools for each job. Select tools that DO NOT require wrist flexion, extension, or deflection. In other words, select tools that allow you to keep your wrist straight or in a neutral position. The fundamental ergonomic principle in the use and design of tools (bending the tool, not the wrists), however correct and valuable, does not always prevent discomfort and injury when using tools with an indiscriminately bent handle, regardless of the layout of the work situation.
Overall, 40 mm (1.5 inch) cylindrical handles offer better grip, with a range of 30 to 50 mm (1.25 to 2 inches). For precision grips, a diameter of 12 mm (0.45 inch) is recommended, with a range of 8 to 16 mm (0.3 to 0.6 inch). The larger diameter will allow for maximum torque, while the smaller diameter helps improve dexterity and speed. A handle that is too short can cause unnecessary compression in the center of the palm.
It should extend across the entire width of the palm. Tool handles should not be smaller than 100 mm (4 inches) to reduce the negative effects of any compression exerted. Handles of about 120 mm (5 inches) are generally recommended. Please note that the use of gloves requires longer tool handles.
Shredding, gripping or cutting tools, such as pliers or pliers, are equipped with two handles. The recommended distance for separating the handles is 65 to 90 mm (2.5 to 3.5 inches). Grips larger than 100 mm (4 inches) will be difficult for some users. Tools with larger or smaller stretches will reduce the maximum grip force.
To ensure a good grip on the handle, there must be sufficient friction between the hand and the handle. This is particularly important when significant force must be applied with a sweaty hand. Hand tools must be made of non-slip, non-conductive and compressible materials. For example, textured rubber handles provide a good grip, reduce the effort needed to use the tool effectively, and prevent the tool from slipping out of the hand.
Glossy coatings and highly polished handles should be avoided. The electrical and thermal insulation properties of the handles are important for electric hand tools. Handles made of plastic or composite rubber are recommended. Sharp edges and contours can be covered with padded tape to minimize lacerations.
The following table summarizes some of the guidelines presented above. When hand tools are used for tasks that require the frequent and repetitive use of force to perform a task or job, the risk of contracting a WMSD increases. One of the most effective ways to reduce the risk of injury associated with using hand tools is to replace them with power tools. Always perform a risk assessment before making any changes.
Make sure that all aspects of the new tool (weight, size, etc.) have been considered. The only effective way to reduce vibration in power tools is in the design phase. This fact makes the selection of tools very important. Anti-vibration materials dampen some vibrations above certain frequencies, which are characteristic of the type of material used.
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Hand tools are extensions of our hands. When we misuse our hands, we feel pain. When we misuse hand tools, the possibility of injuring ourselves or the people who work around us increases. In addition, improper use of a tool can damage the tool or even cause the tool to fail.
Here are some guidelines for the safety of hand tools:. For this reason, it is very important to understand the proper use of hand tools and to learn more about each of them before starting to use them. To properly use a screwdriver, you must grasp the handle with one hand and grasp the tip of the screwdriver, close to the screw, with the other; then apply force and turn until the screw grips, in the next step make sure it is straight. Provides references that can help recognize and control the hazards of hand and power tools in the workplace.
David Russell's vast collection of Western hand tools, from the Stone Age to the 20th century, led to the publication of his book Antique Woodworking Tools. Insulated hand tools must be clearly marked with the official international classification symbol of 1000 volts. The correct use of any tool, including hand tools, is essential to avoid accidents and keep them in the workplace. Wrenches are one of those commonly used hand tools and there are a wide variety of them for different uses and applications.
In this regard, safety goggles and gloves are needed to protect the eyes from flying objects and the hands from possible injuries. . .