Simple Hand tools transforms energy from one form to another.They are Manually handled to perform Mechanical work,which make work easier and faster.
While Designing Simple hand tools some of terms for used
- Effort – The external force applied.
- Load – The force against which a machine works.
- Fulcrum – A fixed point about which a machine turns while doing Mechanical Work.
- Velocity Ratio (VR) -It is the ratio of the velocity of effort to the velocity of load.
- Mechanical Advantage (MA) – The number by which a machine can multiply the magnitude of a force ( force Ratio)
In theory a simple process applied to hand tools with these six kinds of Simple machines
Lever, Pulley,Wheel and axle ,inclined plane, screw and Wedge.
Only using these simple machines hand tools are build.
How are Simple hand tools classified ?
Some of common and Best materials used for making simple hand tools :
- Carbon steel(CS) : Carbon steel is categorized into low carbon steel, medium carbon steel and high carbon steel, depending on the carbon content. Hand tools are manufactured using high-carbon steel because it has high hardness and high strength. However, some of the tools which have risk of cracking are made of low carbon steel due to better toughness compared to high carbon steel. Typical steel grades used for manufacturing of tools are EN 8,EN 9, EN 19, EN 31 and EN 353.
- S2 tool steel – alloy tool steel with carbon (C), silicon (Si), manganese (Mn) ,chromium (Cr), molybdenum (MO) and vanadium (V)
- Chromium-vanadium steel (Cr-V): Chromium vanadium steel is an alloy tool steel with chromium (Cr) and vanadium (V) alloy elements. It has better strength and toughness than carbon steel, so it is a great material for high quality tools. Commonly used tools like wrenches, screwdrivers, manual sleeves etc. generally use 50BV30 chrome vanadium steel. The material of most Hand Tool Pliers are Cr-V
- Chrome molybdenum steel (Cr-Mo): It is an alloy tool steel with chromium (Cr),molybdenum (Mo), iron (Fe) and carbon (C) alloy elements. It has excellent
- impact resistance, strength and toughness, in addition its performance is better than chromium vanadium steel. Suitable for top-grade screwdrivers and small hex wrenches. Overall, the material is more expensive than others.
Why hand tools are very important in every home?
Hand tools are the most effective and efficient way to do many jobs. A tool is any instrument used in doing work. A hand tool is any tool operated by hand to do work.It is used to do a task or job that could not be done with the bare hand or without the tool.
Before you select a tool, think about the job you will be doing. Tools are designed for specific purposes. Using a tool for something other than its intended purpose often damages the tool and could cause you pain, discomfort, or injury. You reduce your chances of being injured when you select a tool that fits the job you will be doing.
7 Tips for selecting Simple Hand tools
- Single-handle tools for power tasks: A tool with a handle diameter in the range of 1 ¼ inches to 2 inches.
- Single-handle tools for precision tasks: A tool with a handle diameter of ¼ inch to ½ inch.
- Double-handle tools (pliers-like) for power tasks: A tool with a grip span at least 2 inches when fully closed and < 3 ½ inches when fully open. When continuous force is required, consider using a clamp, a grip or locking pliers. Double-handle tools (plier-like) used for precision tasks:
- A tool with a grip span > 1 inch when fully closed and < 3 inches when fully open.
- Double-handled pinching, gripping or cutting tools:A tool with spring-loaded handles to return the handles to the open position.
- A tool without sharp edges or finger grooves on the handle.
- A tool coated with soft material or add a sleeve to the tool handle. This pads the surface but also increases the diameter or the grip span of the handle
General Information simple hand tools list and their uses
- Use them to strike objects to position or mark them, or drive fasteners.
- Don’t ever strike two hammer heads together, they may shatter.
- Use soft hammers (mallets) for positioning.
- Use ball peen hammers for metal work.
- Use an appropriate type and size hammer for the job.
- Make sure that the hammer head is securely attached to the handle before using
Chisels and Punches:
• Use them to remove material or mark a drilling position.
• Wear a Face Shield when using a chisel.
• Plan where the chiseled parts will fly and take precautions to protect
• Don’t use chisels with a “mushroomed” head. The heads might shatter on impact, sending sharp fragments flying.
• Use the appropriate chisel for wood or metal
• Drive a wood chisel with a mallet.
• Drive a metal chisel or punch with a Ball Peen hammer.
• Hacksaws are for metal, wood saws are for wood.
• At least three teeth must span the thickness of the material to be cut.
• Keep hands out of the plane of the blade.
• Keep hands on top of the material and visible.
• Start and end your cut gently for accuracy.
• Coarse teeth are for “soft” materials. Fine teeth are for “hard” materials.
- Use them to drive or loosen screws and fasteners.
- Use the correct type that fits the fastener.
- Flat Blade/Standard (straight blade)
- Phillips (x-shaped)
- Torx (star shaped-6 points)
- Allen (fits into a hexagon shaped hole)
- Nut Driver (fits over hexagon shaped)
- Use the correct blade SIZE that fits the fastener type..
- Don’t ever misuse a screwdriver as a chisel or prybar.
- Don’t use a screwdriver if the tool tip is worn or damaged.
Pliers and Wrenches:
• Use Pliers to grip surfaces and objects with irregular shapes.
• Don’t ever hammer on the handle.
• Don’t grip Pliers with your fingers between the handles, as they will be pinched if the tool slips.
• Keep the jaws parallel or the handles close together for the safest grip.
• If the part is too big, use a pipe or strap wrench.
• Pull towards yourself, don’t push, for safe control.
• Must fit the part snugly to prevent slipping and injuring you.
• Never use pliers or pipe wrenches on parts with flat sides.
• Don’t use extensions or “cheaters”, you will break or bend the tool.
• Use Wrenches to tighten or remove nuts and bolts or objects with flat surfaces. Do not use a wrench if the jaws are sprung (not parallel).
• Don’t use Pliers on parts with “flats” (i.e. nuts, bolts, plumbing valves, precision parts), as they will damage the surface