Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Hammer shopping experience:

1. Compare - without doubt the biggest advantage that the Hammer offers shoppers today is the ability to compare thousands of Hammer at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Hammer? Wrong! If the Hammer is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Hammer then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Hammer? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Hammer and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Hammer wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Hammer then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Hammer site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Hammer, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Hammer, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

A hammer is a tool meant to deliver blows to an object. The most common uses are for driving nail (engineering)s, fitting parts, and breaking up objects. Hammers are often designed for a specific purpose, and vary widely in their shape and structure. Usual features are a handle and a head, with most of the weight in the head. The basic design is hand-operated, but there are also many mechanically operated models for heavier uses.

The hammer is a basic tool of many professions, and can also be used as a War hammer. Either way, it is perhaps the oldest human tool, perhaps even older than the earliest Homo (genus) species.

By analogy, the name hammer has also been used for devices that are designed to deliver blows, e.g. in the caplock mechanism of firearms.

History The use of simple tools dates to about 2,400,000 B.C. when various shaped stones were used to strike wood, bone, or other stones to and break them apart and shape them. Stones attached to sticks with strips of leather or animal sinew were being used as hammers by about 30,000 B.C. during the middle of the Old Stone Age.

Designs and variations The essential part of a hammer is the head, a compact solid mass that is able to deliver the blows to the intended target without itself deforming.

The opposite side of the head may have a second striking surface; or a claw or wedge to pull nails, or may be shaped like a ball as in the ball-peen hammer and the cow hammer. Some upholstery hammers have a magnetized appendage, to pick up tacks. In the hatchet the hammer head is secondary to the cutting edge of the tool.

In recent years the handles have been made of durable plastic or rubber. The hammer varies at the top, some are larger than others giving a larger surface area to hit different sized nails and such,

Popular hand-powered variations include:

image:hammer2.jpg|Claw hammerImage:Framing hammer.jpg]Image:GeologicalHammerSolidForgedHead.png|Geologist's hammerImage:Hammer tapissier.jpg]Image:Hammer-1.jpg|Cross-peen hammerImage:Ball-peen hammer 380mm.JPG]Image:Mallet.jpg|Rubber malletImage:Wooden mallet.jpg]Image:Sledgehammer.jpg|Sledgehammer

Mechanically-powered hammers often look quite different from the hand tools, but nevertheless most of them work on the same principle. They include:

In professional framing (construction) carpentry, the hammer has almost been completely replaced by the nail gun. In professional upholstery, its chief competitor is the staple gun.

Tools used in conjunction with hammers

The physics of hammering Hammer as a force amplifier A hammer is basically a force amplifier, that works by converting mechanical work into kinetic energy and back.

In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f—roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.

Effect of the head's mass The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases geometrically with the speed (see the effect of the handle, below). High tech titanium heads are lighter and allow for longer handles, thus increasing velocity and delivering more energy with less arm fatigue than that of a steel head hammer of the same weight. As hammers must be used in many circumstances, where the position of the person using them cannot be taken for granted, trade-offs are made for the sake of practicality. In areas where one has plenty of room, a long handle with a heavy head (like a sledge hammer) can deliver the maximum amount of energy to the target. But clearly, it's unreasonable to use a sledge hammer to drive upholstery tacks. Thus, the overall design has been modified repeatedly to achieve the optimum utility in a wide variety of situations.

Effect of the handle The handle of the hammer helps in several ways. It keeps the user's hands away from the point of impact. It provides a broad area that is better-suited for gripping by the hand. Most importantly, it allows the user to maximize the speed of the head on each blow. The primary constraint on additional handle length is the lack of space in which to swing the hammer. This is why sledge hammers, largely used in open spaces, can have handles that are much longer than a standard carpenter's hammer. The second most important constraint is more subtle. Even without considering the effects of fatigue, the longer the handle, the harder it is to guide the head of the hammer to its target at full speed. Most designs are a compromise between practicality and energy efficiency. Too long a handle: the hammer is inefficient because it delivers force to the wrong place, off-target. Too short a handle: the hammer is inefficient because it doesn't deliver enough force, requiring more blows to complete a given task. Recently, modifications have also been made with respect to the effect of the hammer on the user. A titanium head has about 3% recoil and can result in greater efficiency and less fatigue when compared to a steel head with about 27% recoil. Handles made of shock-absorbing materials or varying angles attempt to make it easier for the user to continue to wield this age-old device, even as nail guns and other powered drivers encroach on its traditional field of use.

War hammers The concept of putting a handle on a weight to make it more convenient to use may well have led to the very first weapons ever invented. The club (weapon) is basically a variant of a hammer. In the Middle Ages, the war hammer became popular when edged weapons could no longer easily penetrate some forms of armour.

Symbolic hammers The hammer is associated with West Ham United, who are nicknamed 'The Hammers' and have a symbol of two crossed hammers on the team crest. The origin of this goes back to the club's beginning in the 19th Century, when the Thames Ironworks company football team turned professional in 1895, and became renamed as West Ham United.

The hammer, being one of the most used tools by Homo Sapiens, has been used very much in symbols and arms. In the Middle Ages it was used often in blacksmith guild logos, as well as in many family symbols. The most recognised symbol with a hammer in it is the Hammer and Sickle, which was the symbol of the former Soviet Union. The hammer in this symbol represents the industrial working class (and the sickle the agricultural working class). The hammer is used in some coat of arms in (former) socialist (or pseudo socialist) countries like East Germany.

In Norse Mythology, Thor, the god of thunder and lightning, wields a hammer named Mjolnir. Many artifacts of decorative hammers have been found leading many modern practitioners of this religion to often wear reproductions as a sign of their faith.

"The Hammer" is also the nickname of David Thoresen, a fight club member, who is also known as "Thor".

In the 1982 film Pink Floyd The Wall, a circular logo featuring two crossed hammers was used on armbands, flags, and banners during the fascist rally scene. These hammers were also featured in the famous "marching hammers" animation loop and the video for "Another Brick in the Wall (Part II)".

The song If I Had a Hammer has been a top ten hit and was considered an anthem of the Civil Rights Movement. It has been recorded by many artists, including Peter, Paul, and Mary, Trini Lopez, and Leonard Nimoy. The song begins: If I had a hammer I'd hammer in the morning I'd hammer in the evening all over this land I'd hammer out danger, I'd hammer out warning I'd hammer out love between my brothers and my sisters All over this land

In ultimate frisbee, the hammer is a commonly used overhead throw that is thrown vertically and turns over to land upside down horizontally.

In German language "hammer" is used as a superlative. Young people are known to say "Das ist der hammer!" or "Das ist hammer geil."

External links

A hammer is a tool meant to deliver blows to an object. The most common uses are for driving nail (engineering)s, fitting parts, and breaking up objects. Hammers are often designed for a specific purpose, and vary widely in their shape and structure. Usual features are a handle and a head, with most of the weight in the head. The basic design is hand-operated, but there are also many mechanically operated models for heavier uses.

The hammer is a basic tool of many professions, and can also be used as a War hammer. Either way, it is perhaps the oldest human tool, perhaps even older than the earliest Homo (genus) species.

By analogy, the name hammer has also been used for devices that are designed to deliver blows, e.g. in the caplock mechanism of firearms.

History The use of simple tools dates to about 2,400,000 B.C. when various shaped stones were used to strike wood, bone, or other stones to and break them apart and shape them. Stones attached to sticks with strips of leather or animal sinew were being used as hammers by about 30,000 B.C. during the middle of the Old Stone Age.

Designs and variations The essential part of a hammer is the head, a compact solid mass that is able to deliver the blows to the intended target without itself deforming.

The opposite side of the head may have a second striking surface; or a claw or wedge to pull nails, or may be shaped like a ball as in the ball-peen hammer and the cow hammer. Some upholstery hammers have a magnetized appendage, to pick up tacks. In the hatchet the hammer head is secondary to the cutting edge of the tool.

In recent years the handles have been made of durable plastic or rubber. The hammer varies at the top, some are larger than others giving a larger surface area to hit different sized nails and such,

Popular hand-powered variations include:

image:hammer2.jpg|Claw hammerImage:Framing hammer.jpg]Image:GeologicalHammerSolidForgedHead.png|Geologist's hammerImage:Hammer tapissier.jpg]Image:Hammer-1.jpg|Cross-peen hammerImage:Ball-peen hammer 380mm.JPG]Image:Mallet.jpg|Rubber malletImage:Wooden mallet.jpg]Image:Sledgehammer.jpg|Sledgehammer

Mechanically-powered hammers often look quite different from the hand tools, but nevertheless most of them work on the same principle. They include:

In professional framing (construction) carpentry, the hammer has almost been completely replaced by the nail gun. In professional upholstery, its chief competitor is the staple gun.

Tools used in conjunction with hammers

The physics of hammering Hammer as a force amplifier A hammer is basically a force amplifier, that works by converting mechanical work into kinetic energy and back.

In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f—roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.

Effect of the head's mass The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases geometrically with the speed (see the effect of the handle, below). High tech titanium heads are lighter and allow for longer handles, thus increasing velocity and delivering more energy with less arm fatigue than that of a steel head hammer of the same weight. As hammers must be used in many circumstances, where the position of the person using them cannot be taken for granted, trade-offs are made for the sake of practicality. In areas where one has plenty of room, a long handle with a heavy head (like a sledge hammer) can deliver the maximum amount of energy to the target. But clearly, it's unreasonable to use a sledge hammer to drive upholstery tacks. Thus, the overall design has been modified repeatedly to achieve the optimum utility in a wide variety of situations.

Effect of the handle The handle of the hammer helps in several ways. It keeps the user's hands away from the point of impact. It provides a broad area that is better-suited for gripping by the hand. Most importantly, it allows the user to maximize the speed of the head on each blow. The primary constraint on additional handle length is the lack of space in which to swing the hammer. This is why sledge hammers, largely used in open spaces, can have handles that are much longer than a standard carpenter's hammer. The second most important constraint is more subtle. Even without considering the effects of fatigue, the longer the handle, the harder it is to guide the head of the hammer to its target at full speed. Most designs are a compromise between practicality and energy efficiency. Too long a handle: the hammer is inefficient because it delivers force to the wrong place, off-target. Too short a handle: the hammer is inefficient because it doesn't deliver enough force, requiring more blows to complete a given task. Recently, modifications have also been made with respect to the effect of the hammer on the user. A titanium head has about 3% recoil and can result in greater efficiency and less fatigue when compared to a steel head with about 27% recoil. Handles made of shock-absorbing materials or varying angles attempt to make it easier for the user to continue to wield this age-old device, even as nail guns and other powered drivers encroach on its traditional field of use.

War hammers The concept of putting a handle on a weight to make it more convenient to use may well have led to the very first weapons ever invented. The club (weapon) is basically a variant of a hammer. In the Middle Ages, the war hammer became popular when edged weapons could no longer easily penetrate some forms of armour.

Symbolic hammers The hammer is associated with West Ham United, who are nicknamed 'The Hammers' and have a symbol of two crossed hammers on the team crest. The origin of this goes back to the club's beginning in the 19th Century, when the Thames Ironworks company football team turned professional in 1895, and became renamed as West Ham United.

The hammer, being one of the most used tools by Homo Sapiens, has been used very much in symbols and arms. In the Middle Ages it was used often in blacksmith guild logos, as well as in many family symbols. The most recognised symbol with a hammer in it is the Hammer and Sickle, which was the symbol of the former Soviet Union. The hammer in this symbol represents the industrial working class (and the sickle the agricultural working class). The hammer is used in some coat of arms in (former) socialist (or pseudo socialist) countries like East Germany.

In Norse Mythology, Thor, the god of thunder and lightning, wields a hammer named Mjolnir. Many artifacts of decorative hammers have been found leading many modern practitioners of this religion to often wear reproductions as a sign of their faith.

"The Hammer" is also the nickname of David Thoresen, a fight club member, who is also known as "Thor".

In the 1982 film Pink Floyd The Wall, a circular logo featuring two crossed hammers was used on armbands, flags, and banners during the fascist rally scene. These hammers were also featured in the famous "marching hammers" animation loop and the video for "Another Brick in the Wall (Part II)".

The song If I Had a Hammer has been a top ten hit and was considered an anthem of the Civil Rights Movement. It has been recorded by many artists, including Peter, Paul, and Mary, Trini Lopez, and Leonard Nimoy. The song begins: If I had a hammer I'd hammer in the morning I'd hammer in the evening all over this land I'd hammer out danger, I'd hammer out warning I'd hammer out love between my brothers and my sisters All over this land

In ultimate frisbee, the hammer is a commonly used overhead throw that is thrown vertically and turns over to land upside down horizontally.

In German language "hammer" is used as a superlative. Young people are known to say "Das ist der hammer!" or "Das ist hammer geil."

External links



Home : Hammer
Official site for the producers of Dracula, Frankenstein and other film classics. News, interviews and searchable film database.

Hammer plc
At Hammer, our aim is simple: provide our partners with the best storage products, solutions and service. For 17 years, we have been first to ...

Hammer Computer Parts - sale and rental of DEC Alpha, Compaq, Cisco ...
Sales and rental of DEC, Compaq and Cisco equipment.

hammer from FOLDOC
hammer. Commonwealth hackish synonym for bang on. [Jargon File] (1995-02-16) Try this search on Wikipedia, OneLook, Google

Hammer Museum
Permanent collections include the Armand Hammer Collection of Art which is primarily composed of Impressionist and Post-Impressionist works.

Definition: hammer from Online Medical Dictionary
The Online Medical Dictionary is a searchable dictionary of definitions from medicine, science and technology.

The Hammer Circle
UK organization for hammer throwers. Site includes coaching tips, links, and news articles.

Hammer - Wikipedia, the free encyclopedia
A hammer is a tool meant to deliver an impact to an object. The most common uses are for driving nails, fitting parts, and breaking up objects.

Metal Hammer - Heavy Metal Music Home
Online version of the magazine for metal music fans. News, reviews, diary, features.

Metal Hammer - Blog
Shawn Crahan Speaks About Each Slipknot Album Cycle. Shadows Fall Set For September Shows. MHTV: Blaze Bayley Talks About Maiden At Twickenham! Fields Of the Nephilim - This ...

 

Hammer



 
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