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Thin wall bronze bushings

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Thin wall bronze bushings

Bushing Thin Wall Bronze Bushings Global Sourcing China Shop Online, Self-lubricating Bearing Solutions & Customized Size Services

Online shopping for Sleeve Bearings – Bushings & Bushed Bearings from a great selection at Industrial & Scientific Store.

Bronze Bushings Manufacturer‎, Self-lubricating bronze backed bearing with PTFE sliding layer.

China Suppliers Of Self-lubricating Bronze Bushing Bearings – Slding Bearings Manufacturers & Suppliers

Triple-layer bearing with PTFE-surface, High Quality Suppliers Of PTFE Bushing Bearings with Competitive Price. Sourcing Suppliers Of Composite Bushing Bearings from China Now! Join For Free. Download Bushing Catalog. Search Oilless Bushing Type Products. Highlights: Metric Size and Inch Size Available, Bushing Material Guide Available, On Request Multiple Quotes Available.

Description

Thin Wall Bronze Bushings Worldwide Sites, Sleeve Bushing Global Sourcing

Heavy Duty Parts

official web site

Viiplus has engaged in sliding bearings technological challenges for many years, working with customers around the world to develop effective oilless bearings solutions.

The structure of the bearings consists of rigid steel or corrosion-resistant bronze backing, which provides mechanical strength, while a porous sintered bronze interlayer impregnated with a homogeneous mixture of PTFE and lead provides low friction and high wear resistance.

The low friction of the PTFE bearings reduces power losses for improved energy efficiency, while the wear-resistant bronze layer provides extended service life. Being self-lubricating, the bearings require little to no maintenance. However, they can also be used with a lubricant to prevent potential shaft/bearing seizure under boundary conditions.

Easy Bushing Sleeve Online Sourcing

Professional Bronze Bushings Suppliers Industrial Equipment & Bronze Bushing Components Industry.

Special manufacturing, Metallic & Self-Lubricating Bushings, Polymer Lined Composite Bushing Series.

Feature a hardened steel backing with an inner lining of PTFE or POM. Cylindrical, flanged, and thrust bushings forms are available.

Upon request, we can offer inch-sizes, special lengths, bearings acc. to drawing and various PTFE-layers for different areas of use as well as different backings in bronze or stainless steel, etc.

Cross-section of PTFE Composite, PTFE tin bronze copper layer sheet steel backing copper layer tin layer.

The advantages of oil-free self-lubricating bearings are as follows:

1. Oil-free or oil-less lubricated bearings are suitable for places where oil cannot be filled or it is difficult to fill. They can be used without or with little maintenance.

2. Good wear resistance, small friction coefficient, and long service life.

3. There is an appropriate amount of elastoplasticity, which can distribute the stress on a wider contact surface and improve the bearing capacity.

4. The coefficient of static and dynamic friction is similar, which can eliminate the creep at low speed, thus ensuring the working accuracy of the machine.

5. It can reduce vibration, reduce noise, prevent pollution, and improve working conditions.

6. Transfer film can be formed in the operation process to protect the grinding shaft, without biting the shaft.

7. The hardness requirements for the grinding shaft are low, which can be used without adjusting the shaft, thus reducing the processing difficulty of related parts.

8. Thin wall structure, lightweight, can reduce the mechanical volume.

9. The bushing is made of brass and can be used in corrosive media.

 split-bushing

The nine advantages of oil-free self-lubricating bearings

Self-lubricating bearing is developed on the metal friction surface of the bearing matrix with holes arranged in order and appropriate size, and embedded in molybdenum disulfide, graphite, and other composite self-lubricating block embedded in the metal sleeve, the composite bearing made of solid lubricant friction area up to 25-65%. The solid self – lubricating block can work normally at 280℃.But because of its low mechanical strength, bearing self-lubricating bearing capacity is weak, easy to produce deformation, it can be embedded in the metal hole groove to suppress this defect, the formation of metal part bearing function, self-lubricating block lubrication function. The lubrication mechanism of the self-lubricating bearing is that during the sliding friction process between the shaft and the sleeve, part of the molecular oil-free bearing of the self-lubricating material is transferred to the metal surface of the shaft to fill in the tiny non-plane and form a stable solid lubrication film, which causes the friction between the solid lubrication film and prevents the adhesive wear of the shaft and the sleeve. This rational combination combines the complementary advantages of copper alloy and non-metallic anti-wear materials, which is especially suitable for non-oil, high temperature, high load, low speed, anti-fouling, anti-corrosion, and strong radiation environment, as well as for special working conditions in which lubricating grease cannot be added to water or other solutions.

The area ratio of the self-lubricating block to the surface area of the self-lubricating block is related to the running speed and pressure strength, and the running speed is low. Pressure strength, the metal area should be larger.

Bearing Properties

GENERAL Unit Value
Maximum load, p Static

Dynamic

N/mm2

N/mm2

250

140

Operating temperature Min

Max

°C

°C

– 200

280

Coefficient of linear thermal expansion Parallel to the surface

Normal to the surface

10-6/K

 

10-6/K

11

 

30

DRY
Maximum sliding speed, U m/s 2.5
Maximum pU factor N/mm2 x m/s 1.8
Coefficient of friction 0.02 – 0.25 *
OIL LUBRICATED
Maximum sliding speed, U m/s 5.0
Maximum pU factor N/mm2 x m/s 5.0
Coefficient of friction 0.02 – 0.12
RECOMMENDATIONS
Shaft surface roughness, Ra Dry

Lubricated

µm

µm

0.3 – 0.5

≤ 0.05 – 0.4 *

Shaft surface hardness Unhardened acceptable, improved bearing life > 200HB

An easy way to send your self-lubricating bearings parts size requests and get quotes.

  • Get free quotes
  • Verified sleeve bushing suppliers
  • Quotes comparison and sample request

PTFE composite bushings material

PTFE composite plain bearings combine the mechanical strength of steel with the low friction of a PTFE-based self-lubricating lead-free sliding layer. The intermediate layer of porous tin bronze creates a strong bond between the backing and sliding surfaces and also improves the dissipation of heat generated during operation. To protect the bearings from corrosion, the steel backing is tin-plated. With the exception of the sliding surface, PTFE composite dry sliding bearings can be machined. Calibration is possible within certain limits.

PTFE composite bushings lubrication

The PTFE-based sliding surface permits smooth, low-friction operation without lubrication. During a short running-in phase, there will be some transfer of PTFE material from the sliding contact surface to the counterface. After this transfer, the characteristic low friction and wear properties of these bearings will be achieved.
The presence, or continuous supply of oil or other non-corrosive fluids may be advantageous and improve the performance of these bearings.

Tips for bearing maintenance

  • 1.Handle and store properly

To prevent contaminants including moisture, dust, or dirt from entering the bearings, they should be properly handled and stored. First, the bearings should be placed horizontally in their original packaging in a clean, dry, and room temperature environment. Avoid handling bearings unnecessarily, for example, if they are removed prematurely, they may be exposed to corrosion or contaminants. Bearings are precision parts and should be handled with care. Therefore, dropped components should not be used, as this can cause premature failure.

  • 2.Use professional tools

Proper equipment should be used when handling bearings. Non-dedicated tools used during bearing mounting and dismounting may cause unnecessary damage, dents, and wear. For example, bearing pullers or induction heaters are specifically designed for bearings.

  • 3.Check the bearing box and shaft

Check the physical condition of the housing and shaft before mounting the bearings. Use a soft cloth to wipe the surface until you are familiar with the correct installation procedure.

  • 4.Correct installation

The correct method of mounting the bearing shall be used, depending on the type of bearing and the type of fit. Radial ball bearing rings can be installed in a variety of ways, from sliding fit to the tight fit, depending on the type of load, speed, and vibration level. Applying pressure on the wrong ring during installation may cause damage to the roll. Similarly, the too loose or too tight fit should be avoided to avoid the smooth over low or circular shaft bearing or incorrect housing.

  • 5.Correct lubrication

One of the main causes of bearing failure is lubrication failure. This includes using the wrong lubricant and using too much or too little. Choose the right lubricant by considering environmental conditions, temperature, speed, and load. The bearing expert will be able to make appropriate lubrication recommendations and keep the bearing lubrication within a few milligrams. Therefore, if you need a low, normal, or high amount of grease filling, you can rest assured that lubrication will not cause problems in the future.

  • 6.Avoid temperature beyond bearing range

Heating steel bearings beyond the limits of their design can permanently deform or soften the bearing material, resulting in reduced bearing capacity and equipment failure. The first step is to select bearings suitable for your temperature range. Note discoloration of rings, rolling elements, and retainers during regular maintenance, as this may indicate overheating. This may be due to high operating temperature and improper lubrication, so it needs to be brought to your attention quickly.

  • 7.Prevent corrosion as much as possible

Corrosion is the natural enemy of bearings. Over time, corrosion can occur if the bearing is exposed to moisture. This can lead to rusting into the raceway and ultimately premature failure of bearings and equipment. Wearing gloves will ensure that sweat or other liquids do not enter the bearing. When designing specifically for corrosive environments, the choice of suitable bearings is critical. For example, 316 stainless steel bearings with seals are usually a good choice in Marine or chemical environments.

  • 8.Choose alternatives carefully

If the bearing does reach its useful life, replace it with a bearing of the same or higher quality as the original. In the long run, lower-quality alternatives are likely to fail and may lead to more expensive equipment failures.

  • 9.Real-time monitoring

Bearings rarely fail without any warning signals. Too much noise, vibration, or rising temperatures can be signs of a deeper problem. If any abnormal bearing operation occurs, closer monitoring should be carried out.

  • 10.specialists

Finally, if in doubt, seek expert help. The bearing specialist will advise you on the best maintenance methods for your particular application and be able to help you diagnose any bearing problems. It is easy to send the problem bearing to an expert who will check and lubricate the bearing as needed.

Characteristics

  • Maintenance-free
  • Low friction coefficient
  • Multiple areas of use
  • Long lifetime

Type of applications

  • Person lifts
  • Packaging machines
  • Pneumatic cylinders
  • Pumps

Design

  • Plain cylindrical bearings
  • flanged bearings
  • thrust washers
  • sliding plates.

Technical information and standard dimensions on the datasheet.

PTFE BUSHINGS

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