# Simple Machines - Screws

### wood force pitch tip

A screw can be considered to be an inclined plane that has been wrapped around some central axis. You can see this relationship by making an inclined plane out of paper and then wrapping the paper around a pencil. The spiral shaped form that you make is a screw.

Screws can be used in two major ways. First, they can be used to hold things together. Some simple examples include wood and metal screws and the screws on jars and bottles and their tops. Screws can also be used to apply force on objects. The screws found in vises, presses, clamps, monkey wrenches, brace and bits, and corkscrews are some examples of this application.

The screw acts as a simple machine when an effort force is applied to the larger circumference of the screw. For example, a person might apply the effort force to a wood screw by turning a screwdriver. That force is then transmitted down the spiral part of the screw called the thread to the tip of the screw. The movement of the screw tip into the wood is the resistance force in this machine. Each complete turn of the screwdriver produces a movement of only one thread of the screw tip into the wood. This distance between two adjacent threads is called the pitch.

The mechanical advantage of a screw can be found by dividing the circumference of the screw by its pitch. For example, suppose that a carpenter is working with screws whose heads have a circumference of 1 in (2.54 cm) and a pitch of 1/8 in (.33 cm). Then the mechanical advantage of these screws is 1 divided by 1/8, or 8. The carpenter magnifies his or her efforts by a factor of 8 in driving the screw into a piece of wood.

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over 10 years ago

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almost 10 years ago

This website was amazing. It really helped me understand the stuff that the screw really does as a simple machine.

over 9 years ago

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almost 7 years ago

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over 9 years ago

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almost 7 years ago

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over 9 years ago

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almost 10 years ago

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i have to do for science and i hope

i pass

over 6 years ago

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almost 6 years ago

This information helped me a lot in my science project

almost 7 years ago

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over 7 years ago

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over 9 years ago

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over 9 years ago

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over 5 years ago

almost 6 years ago

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almost 10 years ago

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almost 7 years ago

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almost 7 years ago

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almost 7 years ago

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almost 6 years ago

;)

Dear Sir,

We hereby take this liberty to introduce ourselves Aufaster Co., Ltd. as a manufacturer and exporter specialized in the field of fasteners, located in Haining, Zhejiang, China.
Our competitive products are listed as below:
Finish: Black, Zinc Plated, Hot dip galvanized,Dacromate,etc.
2) Bolt & Screw:
Hex/hex socket /carriage/hex flange/roofing/square/flat/double end etc.
According to DIN933/931, DIN912, DIN603, DIN6921, etc.
Hook screw, anchor bolt, U-bolt, J bolt and Hanger screw are also available by any size.
Hex Lag Screw (DIN571), Hex CSK Head Wood Screw……… etc.
3）Nut:
Hex/Cap/Wing/Square/Slotted/Nylon insert lock nut/Hex(Round) coupling nut etc.
According to DIN934, DIN1587, DIN315, DIN935, DIN557, DIN985, DIN6334
4) Washer:
Flat washer, spring washers, tooth washers, fender washer, hardened washer, ring washer etc.,
According to DIN125/127/9021/7980, or USS/SAE/BS.
5) Small Metal Screw:
Self tapping screw, self drilling screw, chipboard screw, drywall screw machine screw,confirmat screw, etc.,
6) Anchors,Pins & Rivets:
Metal Frame anchor, Drop in anchor, Cut anchor, Sleeve anchor, Wedge anchors, Bolt anchor,
Hammer Drive-in Anchor(plastic and Zinc Alloy). Various pins and Rivets!
7) Rigging:
DIN580/DIN582/DIN1480/DIN741/DIN6899/DIN5299/DIN763/DIN766

Pls browse our website to know us more. If there are any questions or concerns you may have, please don't hesitate to contact me directly.

almost 4 years ago

You need to ad example this site didn't help me at all. Not trying to be mean though.

over 5 years ago

t5his sucks

over 9 years ago

yeah thanks, it really did help a lot.

over 9 years ago

wow thanks, it hepled me alot ^_^

almost 3 years ago

I WANTEED SOMETHING short BUT IT WAS GOOD

BAYOT KO!!!!!!!!!!!!!!!!!

hahahahahahahah

12 months ago

I really just needed an example for the dimensions of a screw.

But yeah the lesson was good too.

i leik turtlz.

over 1 year ago

Great

over 1 year ago

It is fun to use.

over 1 year ago

nice

thank you for this website it helps me a lot

over 1 year ago

Dear Sir,

We hereby take this liberty to introduce ourselves Aufaster Co., Ltd. as a manufacturer and exporter specialized in the field of fasteners, located in Haining, Zhejiang, China.
Our competitive products are listed as below:
Finish: Black, Zinc Plated, Hot dip galvanized,Dacromate,etc.
2) Bolt & Screw:
Hex/hex socket /carriage/hex flange/roofing/square/flat/double end etc.
According to DIN933/931, DIN912, DIN603, DIN6921, etc.
Hook screw, anchor bolt, U-bolt, J bolt and Hanger screw are also available by any size.
Hex Lag Screw (DIN571), Hex CSK Head Wood Screw……… etc.
3）Nut:
Hex/Cap/Wing/Square/Slotted/Nylon insert lock nut/Hex(Round) coupling nut etc.
According to DIN934, DIN1587, DIN315, DIN935, DIN557, DIN985, DIN6334
4) Washer:
Flat washer, spring washers, tooth washers, fender washer, hardened washer, ring washer etc.,
According to DIN125/127/9021/7980, or USS/SAE/BS.
5) Small Metal Screw:
Self tapping screw, self drilling screw, chipboard screw, drywall screw machine screw,confirmat screw, etc.,
6) Anchors,Pins & Rivets:
Metal Frame anchor, Drop in anchor, Cut anchor, Sleeve anchor, Wedge anchors, Bolt anchor,
Hammer Drive-in Anchor(plastic and Zinc Alloy). Various pins and Rivets!
7) Rigging:
DIN580/DIN582/DIN1480/DIN741/DIN6899/DIN5299/DIN763/DIN766

Pls browse our website to know us more. If there are any questions or concerns you may have, please don't hesitate to contact me directly.
Vote down Vote up
over 4 years ago
breezy
Thank you for this wonderful information it realy helped me with my school progect. You did a wonderful jod you must have worked very hard on this
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mostwanted
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over 4 years ago
Joe
;)
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over 5 years ago
kaksjfhdf
hahahahahahahah
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almost 8 years ago
Brianna
yeah thanks, it really did help a lot.
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nvm
wow thanks, it hepled me alot ^_^
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over 1 year ago
MILLER PHILIP
I WANTEED SOMETHING short BUT IT WAS GOOD
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almost 4 years ago
kkkdick
t5his sucks
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over 5 years ago
Von
BAYOT KO!!!!!!!!!!!!!!!!!
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over 5 years ago
kaksjfhdf
hahahahahahahah
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over 1 year ago
amanda
thank you for this website it helps me a lot
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over 2 years ago
Abc deft
You need to ad example this site didn't help me at all. Not trying to be mean though.
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over 3 years ago
Yvette
This was good information,butit was terrible so i found a new website and it worked BEAUTIFULLY! so thank you for the info but it was too short but i still got an A
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3 months ago
Ramani Bhavesh L
Give me a please scruw of machin
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10 months ago
casandra
the internet likes
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over 1 year ago
amanda
thank you for this website it helps me a lot
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over 1 year ago
amanda
this website makes my home work easyier
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almost 2 years ago
shahul
Thank you very much for your information, this very helpful for my project.

Read more: Simple Machines - Screws - Force, Wood, Tip, and Pitch - JRank Articles http://science.jrank.org/pages/4058/Machines-Simple-Screws.html#ixzz4JumaIXym

This was good information,butit was terrible so i found a new website and it worked BEAUTIFULLY! so thank you for the info but it was too short but i still got an A

2 months ago

bleh

2 months ago

bleh

almost 2 years ago

Give me a please scruw of machin

over 2 years ago

the internet likes