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 Bushing shopping experience:
1. Compare - without doubt the biggest advantage that the Bushing offers shoppers today is the ability to compare thousands of Bushing 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 Bushing? Wrong! If the Bushing 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 Bushing then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Bushing? 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 Bushing 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 Bushing 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 Bushing 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 Bushing site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Bushing, 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 Bushing, 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.
image:plainbearing.jpg, plain bearing shells
A mechanical bushing is a cylindrical lining designed to reduce friction and wear, or constrict and restrain motion of mechanical parts.
In the
electrical field bushings are circular plastic ring fittings that slide or screw onto conduit or connectors to provide protection to the
insulated cables that will be pulled through them. Bushings play an important role in assuring the integrity of cables during and after their installation. See
Bushing (electrical)
Bushing types
One type of bushing is a hardened screw threaded fixing hole which allows one assembly to be fixed to another by means of a
screw or threaded
bolt. The use of a bushing can make assembly easier because it avoids the need for a separate Nut (hardware) and washer on the other side of the fixed material. Bushings can be fitted into sheet material by
riveting - often the rivet itself incorporates the bushing.
Plain bearings
A typical plain bearing is made of two parts. For example a rotary plain bearing can be just a shaft running through a hole. A simple linear bearing can be a pair of flat surfaces designed to allow motion, for example a drawer and the slides it rests on.
Plain bearings may carry load in one of several ways depending on their operating conditions, load, relative surface speed (shaft to journal), clearance within the bearing, quality and quantity of lubricant and temperature (affecting lubricant viscosity). If full-film conditions apply, the bearing's load is carried solely by a film of fluid lubricant, there being no contact between the two bearing surfaces. In this condition they are known as
fluid bearings. In mix or boundary conditions, load is carried partly by direct surface contacts and partly by a film forming between the two. In a dry condition, the full load is carried by surface to surface contact.
Plain bearings are relatively simple and hence inexpensive. They are also compact, light weight, straightforward to repair and have high load-carrying capacity. However, if operating in dry or boundary conditions plain bearings may wear faster and have higher friction than rolling element bearings. Dry and boundary conditions may be experienced even in a
fluid bearing when operating outside of its normal operating conditions, i.e., at startup and shutdown.
A common plain bearing design is to use a hardened and polished
steel shaft and a soft bronze bushing. In such designs the softer bronze portion can be allowed to wear away, to be periodically renewed.
Plain 'self-lubricating' bearings utilize porous journals within which a lubricant is held. As the bearing operates and lubricant is displaced from the bearing surface, more is carried in from non-wear parts of the bearing. Dry plain bearings can be made of a variety of materials including PTFE (Teflon), graphite, graphite/metal (Graphalloy) and ceramic. The ceramic is very hard, and sand and other grit which enter the bearing are simply ground to a fine powder which does not inhibit the operation of the bearing.
Solid polymer types
Solid polymer plain bearings are now increasingly popular due to dry-running lubrication-free behaviour. Polymer plain bearings now provide the step from a simple plastic bushing to the proven and tested, and thereby predictable and quickly available, machine component. Solid polymer plain bearings give low weight and corrosion resistance, as well as the freedom from maintenance and lubrication enable a solution for almost all applications.
Managing without lubrication is the dream of every design engineer. With modern materials, polymer plain bearings make this a reality. After research spanning decades, an accurate calculation of the service life of polymer plain bearings is possible today. It is important not to confuse a solid polymer plain bearing with a polymer coated plain bearing, which is a much older technology. Many companies produce bushings which consist of a metal shell which then has a very thin polymer coating (usually PTFE or similar) applied to the inside.
Applications
Bushings are also used to transfer loads from a fastening to a much larger area in the underlying structure, the object being to reduce the strain on individual fibers within the underlying structure.
In a car or other vehicle's Suspension (vehicle),
rubber bushings are used to connect the various moving arms and pivot points to the chassis and other parts of the suspension. In order to minimise vibration, wear and transmission of noise, they often incorporate flexible material such as
rubber or
polyurethane. These bushings often take the form of an annular cylinder of flexible material inside a metallic casing or outer tube. They might also feature an internal
crush tube which protects the bushing from being crushed by the fixings which hold it on to a threaded spigot. Many different types of bushing designs exist .
See also
External Links
- Several bushing drawings
- Polymer plain bearing manufacturer - igus
- Polymer plain bearing manufacturer - Pacific Bearing
- Polymer plain bearing manufacturer - GGB
References
image:plainbearing.jpg, plain bearing shells
A mechanical bushing is a cylindrical lining designed to reduce friction and wear, or constrict and restrain motion of mechanical parts.
In the electrical field bushings are circular plastic ring fittings that slide or screw onto conduit or connectors to provide protection to the
insulated cables that will be pulled through them. Bushings play an important role in assuring the integrity of cables during and after their installation. See Bushing (electrical)
Bushing types
One type of bushing is a hardened screw threaded fixing hole which allows one assembly to be fixed to another by means of a screw or threaded
bolt. The use of a bushing can make assembly easier because it avoids the need for a separate Nut (hardware) and
washer on the other side of the fixed material. Bushings can be fitted into sheet material by riveting - often the rivet itself incorporates the bushing.
Plain bearings
A typical plain bearing is made of two parts. For example a rotary plain bearing can be just a shaft running through a hole. A simple linear bearing can be a pair of flat surfaces designed to allow motion, for example a drawer and the slides it rests on.
Plain bearings may carry load in one of several ways depending on their operating conditions, load, relative surface speed (shaft to journal), clearance within the bearing, quality and quantity of lubricant and temperature (affecting lubricant viscosity). If full-film conditions apply, the bearing's load is carried solely by a film of fluid lubricant, there being no contact between the two bearing surfaces. In this condition they are known as
fluid bearings. In mix or boundary conditions, load is carried partly by direct surface contacts and partly by a film forming between the two. In a dry condition, the full load is carried by surface to surface contact.
Plain bearings are relatively simple and hence inexpensive. They are also compact, light weight, straightforward to repair and have high load-carrying capacity. However, if operating in dry or boundary conditions plain bearings may wear faster and have higher friction than rolling element bearings. Dry and boundary conditions may be experienced even in a
fluid bearing when operating outside of its normal operating conditions, i.e., at startup and shutdown.
A common plain bearing design is to use a hardened and polished steel shaft and a soft bronze bushing. In such designs the softer bronze portion can be allowed to wear away, to be periodically renewed.
Plain 'self-lubricating' bearings utilize porous journals within which a lubricant is held. As the bearing operates and lubricant is displaced from the bearing surface, more is carried in from non-wear parts of the bearing. Dry plain bearings can be made of a variety of materials including PTFE (Teflon), graphite, graphite/metal (Graphalloy) and
ceramic. The ceramic is very hard, and sand and other grit which enter the bearing are simply ground to a fine powder which does not inhibit the operation of the bearing.
Solid polymer types
Solid polymer plain bearings are now increasingly popular due to dry-running lubrication-free behaviour. Polymer plain bearings now provide the step from a simple plastic bushing to the proven and tested, and thereby predictable and quickly available, machine component. Solid polymer plain bearings give low weight and corrosion resistance, as well as the freedom from maintenance and lubrication enable a solution for almost all applications.
Managing without lubrication is the dream of every design engineer. With modern materials, polymer plain bearings make this a reality. After research spanning decades, an accurate calculation of the service life of polymer plain bearings is possible today. It is important not to confuse a solid polymer plain bearing with a polymer coated plain bearing, which is a much older technology. Many companies produce bushings which consist of a metal shell which then has a very thin polymer coating (usually PTFE or similar) applied to the inside.
Applications
Bushings are also used to transfer loads from a fastening to a much larger area in the underlying structure, the object being to reduce the strain on individual fibers within the underlying structure.
In a car or other vehicle's Suspension (vehicle),
rubber bushings are used to connect the various moving arms and pivot points to the chassis and other parts of the suspension. In order to minimise vibration, wear and transmission of noise, they often incorporate flexible material such as
rubber or polyurethane. These bushings often take the form of an annular cylinder of flexible material inside a metallic casing or outer tube. They might also feature an internal
crush tube which protects the bushing from being crushed by the fixings which hold it on to a threaded
spigot. Many different types of bushing designs exist .
See also
External Links
- Several bushing drawings
- Polymer plain bearing manufacturer - igus
- Polymer plain bearing manufacturer - Pacific Bearing
- Polymer plain bearing manufacturer - GGB
References
Bushing Gland
Bushing Gland] [Flexible Strain Relief] [Hole Plug] [Nylon Cable Gland] [Open/Close Snap] [Snap Bushing] [Strain Relief] Bushing Gland. Material: P.V.C. (Black)
Snap Bushing
Bushing Gland] [Flexible Strain Relief] [Hole Plug] [Nylon Cable Gland] [Open/Close Snap] [Snap Bushing] [Strain Relief] Snap Bushing. Material: UL approved Nylon 66, 94V-2 (Black
Bushing - Wikipedia, the free encyclopedia
A mechanical bushing is a cylindrical lining designed to reduce friction and wear, or constrict and restrain motion of mechanical parts.
Bushing Clock Plates
Bushing Clock Plates I must admit, I had trouble starting this article. There are so many ways to approach this subject. When does a bearing hole need rebushing?
Really Right Stuff - reducer bushing
reducer bushing ... Description. Reducer bushing 3/8"-16 to 1/4"-20. Most clamps have one centralized 3/8"-16 mounting socket.
Metric Bushing Filters
For Immediate Release: Now Offering Mini Metric Bushing with High Test/Working Voltage and In-demand Thread Size (Tucson, Ariz.) April 26, 2006 - Tusonix, Inc., introduces its ...
PIOCH - Bushing for electric transformers
Specialist in equipment for industrial electrical transformers, Pioch is approached by the largest groups world-wide. From mass production to the manufacture of made-to-measure ...
PIOCH - Bind bushing for electrical transformers
Specialist in equipment for industrial electrical transformers, Pioch is approached by the largest groups world-wide. From mass production to the manufacture of made-to-measure ...
Oilfield Glossary: Term 'kelly bushing'
Resource Links: Oilfield Services Schlumberger Excellence in Educational Development Oilfield Review Curve Mnemonic Dictionary: Feedback: We welcome your suggestions and questions:
Bushing.com
Directory of bushings. ... Bushing.com Directory Listings. Accurate Bushing Manufacturer of cam followers, smith bearings and needle bearings.
