Sofia Martinez
Bearings are designed to reduce friction between moving parts. Friction is the resistance to motion between two surfaces. The lower the friction, the easier it is for the two surfaces to slide over each other. Friction causes wear and tear, reducing the lifetime of a material and affecting product efficiency and performance. Plastics are good wear materials with a low coefficient of friction, making them ideal for bearings. Polymer bearings are used in almost every industry, from electronics to oil and gas. They are low maintenance, lightweight, and low friction. Bearing-grade plastics are engineered for low friction and long wear in extreme operating conditions. Lubricants are often used to reduce friction in bearings, but some plastics, such as igus®, inherently contain solid lubricants.
| Characteristics | Values |
|---|---|
| Friction | The lower the friction, the easier it is for two surfaces to slide over each other |
| Wear and tear | Friction causes wear and tear, reducing the lifetime of a material |
| Coefficient of friction | The lower the coefficient of friction, the easier it is for surfaces to slide over each other |
| Abrasion resistance | The abrasion resistance of most plastics is high under dry running conditions |
| Lubrication | Wet lubricants are typically applied to bearings to reduce friction and minimize wear |
| Self-lubricating plastics | Igus® plastics contain solid lubricants that are released in small amounts during movement, eliminating the need for external lubrication |
| Operating environment | Important to evaluate the ability of the plastic to perform in the operating environment, including temperature, UV exposure, and the presence of water or chemicals |
| Material | PTFE, UHMW, Nylon, Acetal, Polyester, and Polyimide are common materials used for plastic bearings |
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What You'll Learn
- Friction plastics for bearings are designed to reduce friction between moving parts
- Plastics have a low coefficient of friction, making them ideal for bearings
- PTFE, Nylon, Acetal, and Polyester are plastics with good sliding friction properties
- Friction generates heat, which can be problematic for plastic plane bearings
- Polymer bearings are lightweight, low-maintenance, and resistant to corrosive chemicals
Friction plastics for bearings are designed to reduce friction between moving parts
Plastics are good wear materials with a low coefficient of friction, making them ideal for applications where friction is a factor. The abrasion resistance of most plastics is also high under dry running conditions. Bearings are designed to limit friction between moving parts, and the rings and balls of these bearings are machined to fine tolerances and high levels of roundness to assist in the reduction of friction.
In bearing applications, wear is often severe as one part slides over another. Plastics such as UHMW, nylon, and acetal are excellent choices for wear applications that involve sliding against mating metal parts. PTFE (polytetrafluoroethylene) is also used for sliding applications due to its low coefficient of friction.
Polymer bearings are found in almost any industry and environment, from the clean rooms of electronics to the harsh conditions of the oil and gas industry. They offer benefits such as resistance to corrosive chemicals, low maintenance, lightweight construction, and low friction. Examples of polymer bearing materials include Torlon PAI, Bearing Grade PEEK, Bearing Grade PPS, Lubricated PET, and Lubricated Nylon. These polymers offer excellent wear resistance, high PV ratings, low friction, and chemical resistance.
Some bearing-grade plastics are engineered for low friction and long wear in extreme operating conditions. For instance, igus® bearings contain solid lubricant particles that are released in small amounts during movement, eliminating the need for external lubrication and reducing maintenance costs.
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Plastics have a low coefficient of friction, making them ideal for bearings
Bearings are designed to limit friction between moving parts. The lower the coefficient of friction, the easier it is for two surfaces to slide over each other. Friction causes wear and tear, reducing the lifetime of a material and affecting product efficiency and performance. This can result in increased part replacement and maintenance costs.
Plastics are very good wear materials with a low coefficient of friction, making them ideal for applications where friction is a consideration. The abrasion resistance of most plastics is also high under dry running conditions. In applications such as bearings, where one part slides over another, wear is often severe.
PTFE (polytetrafluoroethylene) is a plastic with a low coefficient of friction, making it ideal for sliding applications. Other plastics with good sliding friction properties include polyimide, PEEK, PPS, Nylon, Acetal, and Polyester. These materials are often used in bearings, bushings, gears, and chain guides.
Some bearing-grade plastics are engineered for low friction and long wear in extreme operating conditions. These include UHMW, Nylon, Acetal, PET, PBT, PPS, PBT, PPS, PEEK, and Vespel. UHMW and certain grades of thermoset polyurethane perform well in sliding wear and bulk material handling applications that involve contact with gritty abrasive particles.
Polymer bearings are used in a wide range of industries, from the clean rooms of electronics to the harsh conditions of the oil and gas industry. They offer benefits such as resistance to corrosive chemicals, low maintenance, lightweight construction, and low friction. Torlon PAI, Bearing Grade PEEK, Bearing Grade PPS, Lubricated PET, and Lubricated Nylon are commonly used to replace metal bearings. They offer excellent wear resistance, high PV ratings, low friction, and chemical resistance.
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PTFE, Nylon, Acetal, and Polyester are plastics with good sliding friction properties
Friction plastics are used in bearings to reduce friction and minimise wear. They are also used to reduce maintenance and costs. Plastics are good wear materials with a low coefficient of friction, making them ideal for applications where friction is a concern. PTFE, also known as polytetrafluoroethylene or Teflon®, is a plastic with a low coefficient of friction. It is often used for sliding applications and is chemically inert, resisting a wide range of chemical agents. PTFE is also highly resistant to wear due to its smooth and slippery surface. PTFE-filled plastics are good choices for applications that require low friction and long wear life.
Nylon is a plastic with high resistance to wear and compression, making it suitable for manufacturing durable and resistant bushings. It can also be formulated with additives such as PTFE to reduce friction and improve wear performance. Acetal is a strong, hard, and rigid plastic with good wear resistance. It has a low coefficient of friction, making it suitable for applications where low friction is crucial. Polyester is another plastic with good sliding friction properties. It is often used in the food industry when designing mechanical parts subject to high loads and friction. Polyester is also known for its superior resistance to friction and wear, as well as its excellent mechanical strength.
In addition to these plastics, there are other materials used for bearings with low friction and long wear in extreme operating conditions, such as UHMW, PET, PBT, PPS, PEEK, and Vespel. These materials offer benefits such as good corrosion resistance, lower weight, and low noise emission. The choice of material depends on various factors, including the operating environment, such as temperature, radiation exposure, and the presence of water or other chemicals.
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Friction generates heat, which can be problematic for plastic plane bearings
Friction is the resistance to relative motion between two surfaces. The lower the friction, the easier it is for the two surfaces to slide over each other. Friction causes wear and tear, reducing the lifetime of a material. This can affect product efficiency and decrease performance, resulting in increased part replacement and maintenance costs.
Plastic bearings are used in a variety of applications, from the clean rooms of electronics to the harsh conditions of the oil and gas industry. They offer several benefits, including resistance to corrosive chemicals, low maintenance, lightweight construction, and low friction. However, friction generates heat, which can be problematic for plastic plane bearings.
When selecting a plastic bearing material for a high-friction environment, it is essential to consider the coefficient of friction, wear rate, and pressure-velocity limitations of the material. The coefficient of thermal expansion is also crucial, especially if the plastic will be in contact with mating metal parts.
Some plastics, such as UHMW, nylon, and acetal, are excellent choices for wear applications involving sliding against mating metal parts. They offer good abrasion resistance and can be used in dry running conditions. However, nylon's ability to absorb water can affect its dimensions. Other plastics, like PTFE, polyimide, PEEK, PPS, and polyester, are also known for their good sliding friction properties.
To mitigate the effects of friction and heat, bearing-grade plastics are engineered for low friction and long wear in extreme operating conditions. Additionally, wet lubricants or self-lubricating plastics can be used to reduce friction and minimize wear.
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Polymer bearings are lightweight, low-maintenance, and resistant to corrosive chemicals
Polymer bearings are an excellent choice for a variety of applications due to their lightweight, low-maintenance, and corrosion-resistant properties.
Polymer bearings are made from plastics that have a low coefficient of friction, allowing two surfaces to slide over each other with ease. This reduces wear and tear, resulting in longer-lasting parts and lower maintenance costs. Additionally, the abrasion resistance of most plastics used in bearings is high under dry running conditions, further reducing maintenance needs.
The self-lubricating nature of polymer bearings contributes to their low-maintenance design. Unlike traditional metal or bronze bearings that require messy lubricants, polymer bearings contain solid lubricants embedded within their structure. This eliminates the need for external lubrication, reducing maintenance requirements and keeping the environment cleaner by avoiding the release of contaminants.
Polymer bearings are also known for their lightweight construction. This lightweight design helps reduce fuel consumption and carbon dioxide output, making polymer bearings more environmentally friendly than their metal counterparts.
Furthermore, polymer bearings offer excellent resistance to corrosive chemicals. This characteristic makes them suitable for a wide range of environments, including those with exposure to saltwater, harsh chemicals, and wash-down applications. The chemical resistance of polymer bearings also contributes to their durability and long-lasting performance.
Overall, polymer bearings provide a lightweight, low-maintenance, and corrosion-resistant alternative to traditional metal bearings. Their self-lubricating properties, durability, and environmental resistance make them a versatile and cost-effective solution for a broad range of applications.
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Frequently asked questions
Friction plastics are plastics with a low coefficient of friction that are used in bearings to reduce friction between moving parts.
Some plastics used in bearings include PTFE, nylon, acetal, UHMW, PEEK, PPS, and polyester.
Plastics used in bearings have the advantage of being low-maintenance, lightweight, and resistant to corrosive chemicals. They also have good abrasion resistance and can handle high temperatures.
When selecting a plastic bearing material, it is important to evaluate the coefficient of friction, wear rate, and pressure velocity limitations of the material. The operating environment, including temperature extremes, radiation exposure, and the presence of water or other chemicals, should also be considered.
