A ptfe bridge bearing is an essential component of the interface between the superstructure and substructure of a bridge structure. Because of the nature of the forces that are transmitted between these two structures, the bearing must be able to withstand a variety of conditions including heavy traffic loads and their associated vibrations, daily thermal cycles, and the occasional seismic event. These varied factors can put a significant amount of stress on the bridge bearing design and therefore require a special consideration to the material used to fabricate the bearing.

ptfe bridge bearings offer a unique combination of resilience and performance that can meet these challenges with ease. The bearing carries vertical loads on an elastomeric disc confined in a steel cylinder and accommodates rotational movement through deformations of the elastomer. Unlike other structural bearings, a ptfe bridge bearing is capable of supporting both translation and rotation movement through the use of elastomer deformation and is thus capable of a much greater range of movements than other conventional bearings.

These elastomeric bridge bearings can withstand temperatures up to 1000 degrees Fahrenheit with a coefficient of friction of 0.04 to 0.010. They are also resistant to most system media and have the ability to sustain rubbing speeds as high as 10,000 RPM. They are available in cam follower, pillow block, slide, and linear bearing styles for the analytical instrumentation, sample preparation, life sciences, marine, food processing, and material handling industries. Custom and standard products manufactured to customer specifications. Blanket orders, AutoCAD and SolidWorks files accepted.

expanded ptfe tape is a gasket product manufactured from 100% natural expanded PTFE material. It is ideal for glass-lined, plastic or enameled flanges and all stressed joints. It is soft and compressible under reduced bolt loads and can compensate for irregularities on the flange sealing surface. It has an adhesive-backing and can be easily assembled in a wide variety of accessible bolted connections with flat or serrated flange surfaces. It conforms easily to rough or abnormal types of surface, requires lower bolt torques than the majority of gaskets and ends in an extremely tight seal.

Using this product eliminates the need for large inventories of finished gasket PTFE sheets, saves time and money by eliminating template work and precutting and reduces installation times. It has excellent cold flow and creep resistance and can withstand high-temperature applications.

It is recommended for flange connections, steel and glass-lined pipe systems, concrete lids, fume ducts, heat exchangers, ceramic joints, pump housing flanges, steam vessels, plastic or enameled containers, chemical and food industries and special shaped sealing surfaces. Suitable for a wide range of temperatures, from cryogenic up to +260degC. The material is innately hydrophobic, non-wetting and non-contaminating with outstanding chemical resistance to most acids, bases, esters, ketones, aldehydes, lubricants, solvents and fuels.

Before the tape is applied, the sealing surface should be cleaned and greased to ensure a good bond with the surface. The overlapping areas should be skived and cut off to the recommended overlap length. When installed, the tape should be pressed firmly onto the sealing surface with a hand pressure or with a mechanical device (torque wrench) in a series of progressive circular torque sequences.

Molybdenum disulfide oil, better known as Moly or Moly Oil is a lubricant used to reduce friction between two surfaces in contact without the need for an oil medium. It is a naturally occurring material, found in the mineral molybdenite and is extracted as a black crystalline sulfide. It is a very durable solid material that is essentially inert, unaffected by dilute acids and oxygen. It has the feel and appearance of graphite, and is extremely tenacious when it adheres to metal surfaces.

Applicants unique preparation process eliminates the need for expensive retorting and retort controlling equipment. In this process, wet, oily molybdenum disulfide powder derived directly from the oil flotation extraction process of powdered molybdenite concentrate is charged into a fluid energy impact pulverization mill and pulverized while entrained in a stream of gaseous material such as air, compressed nitrogen or superheated steam. This results in a substantially dry, exceedingly fine molybdenum disulfide material containing a controlled amount of residuary oil.

The residuary oil acts as a protective coating on the molybdenum disulfide particles and prevents them from oxidizing during the pulverization process. The residuary oil also helps to retain the comminuted particles in suspension as they are pulverized resulting in a relatively homogeneous, free-flowing powder. This material can then be used as a dry lubricant or added to greases, oils and the like where it will attract the metal parts to which it is applied, acting as an anti-wear surface coating.

Hexagonal Boron Nitride powder is one of the most popular dry lubricants available today. This is due to its lubricant properties, chemical inertness with molten metals and salts, and also its high thermal stability. The product is used for a wide range of applications, including mold release and as a wear-resistant coating.

The global boron nitride price is expected to be driven by the growing demand for personal care products in China and India. This is due to the rapid growth in electronics production, especially smartphones and TVs. Additionally, the increasing number of people is spending more on personal care and cosmetics.

Hexagonal boron nitride is a synthetic ceramic material, with crystalline phases similar to carbon and graphite. The most common form is Saint-Gobain’s hexagonal boron nitride (h-BN), which is a white, lubricious powder with many unique characteristics. The h-BN market is dominated by large manufacturers, such as Saint-Gobain, 3M, Hoganas AB, Showa Denko K.K, and ZYP Coatings Inc.

The hex-boron nitride market is segmented by type, application, classification and end-user. The report covers the sizing and forecast for each segment on a country-wise basis. It provides a detailed analysis of the meager growth segments and opportunities for the boron nitride powder market. It also offers a competitive analysis of the major players in the industry. This includes their revenue share, pricing strategies, and SWOT analyses. The report has been prepared after thorough primary and secondary research, as well as expert interviews.

In a world where equipment is often subject to harsh environments, proper lubrication is essential. moly coat grease is a great solution for industrial machinery applications that require a strong, long-lasting dry film lubricant with high resistance to temperature and pressure. In addition, it helps to prevent fretting, galling and seizing and keeps surfaces in operation with minimal friction.

Molybdenum disulfide (Moly) is a solid additive that’s used in extreme-pressure applications. It is generally considered to be better than graphite when it comes to lubricating metals. It has a higher limit for temperature and can even function in vacuums.

The molybdenum particles stick to metal surfaces and form a protective layer, keeping them from contacting each other. The coating also prevents heat from building up, reducing operating temperatures. Moly also prevents oxidation, which is a major cause of corrosion in many industries.

Unlike other lubricants, a moly-fortified grease does not contain any oils or silicones, so it will leave a clean, strong and hard-wearing dry lubricant film on the surface of a part. It also repels dust and dirt. In addition, it is resistant to most acids and resists salt water penetration.

Our molly coat spray is an aerosol that uses a hydrocarbon propellant to generate a tough lubricating coating on contact areas. It can be applied with a brush, spatula, grease gun or automatic lubrication device. Before applying, ensure that the contact area is clean and dry. It is recommended that the lubricant be allowed to dry completely before operating the machinery.

A VERY SPECIAL DILUTION OF ZDDP ADDITIVE Developed for Older Performance & Classic Cars

zddplus is the only additive which reestablishes the zinc and phosphorus concentration required by engines built prior to 1988 with flat tappet cams. In order to comply with EPA regulations, domestic motor oils have removed the zinc and phosphorus used in these older cars for over 70 years.

This reduction of these additives is due to the EPA's desire to extend the life of emissions control devices (catalytic converters). Adding this 4 ounce bottle to your oil change will bring your current oil's ZDDP back up to the 0.15% level available in the oil that was supplied with the vehicle when new.

In addition to bringing your ZDDP back up to the proper level, zddplus alters bearing and journal surface characteristics to prevent metal-to-metal contact in high stress boundary lubrication conditions. It also helps reduce the tendency of parts to scuff or gall under heavy loads.

zddplus is compatible with any engine oil, including synthetics, and can be added at the same time as your conventional or synthetic oil. It is important to note that this product should NOT be used in OBD II vehicles since it may prematurely erode their catalytic converters. The shelf life of zddplus is many years, as long as it is kept sealed and stored where temperatures do not exceed 120 degrees.

A classic car engine needs a zinc additive or a zinc replacement in the motor oil to prevent metal parts from touching and wearing down too soon. That’s because flat tappet camshafts create a lot of pressure in the valve train when they are operating, and non-zinc modern engine oils won’t provide the needed amount of lubrication to keep those flat-tappet lifters from wearing down too quickly.

The zinc that is used in these additives – most commonly zinc dialkyl dithiophosphates, or ZDDP – bonds to the metallic surfaces of the engine’s mating parts and forms an anti-wear coating. As the temperature rises and those metal parts come into contact, ZDDP decomposes and helps create a lubricant film that minimizes wear.

Zinc is still a popular choice for engine oil additives because it has been well tested over the years, but newer technologies are coming to market that could eventually make zinc unnecessary. Those technologies include molybdenum and boron additives, which have the potential to provide similar anti-wear protection as ZDDP while also helping the engine run more efficiently.

Until those advanced alternatives are ready to hit the market, a ZDDP additive is the best way to ensure that your flat tappet camshaft gets the lubrication it needs to stay in good condition and keep your engine running as smoothly as possible. To get the most out of this engine oil supplement, consider pairing it with a premium engine oil designed to work with it, such as the Lucas Oil 10063.

viscosity and friction are two very important concepts in fluid dynamics, fluid statics, solid statics, and many other areas of science. They are also two phenomena we see all around us and they are really easy to understand given the right approach.

Viscosity quantifies the internal frictional force that opposes fluid layers in relative motion. The shearing stress or strain generated by this internal force depends on both the velocity gradient and the shear rate. Viscosity is different from friction because the shearing force in a fluid doesn’t depend on contact surfaces but rather on the layers of fluid that are moving relative to each other.

While it is difficult to measure the viscosity of a fluid, its effects are very important for understanding fluid dynamics. A fluid with a high viscosity feels thicker and moves slower than a fluid with a low viscosity. This is because a higher viscosity fluid requires more energy to be deformed.

While it is hard to define exactly what causes a fluid’s viscosity, it is generally understood that the shearing stress produced by a fluid must be proportional to the shear rate and the velocity gradient above the surface. For a Newtonian fluid, this means that the momentum transport is governed by discrete molecular collisions and that it is essentially the same as what happens in a stationary fluid (see this article). For non-Newtonian fluids, the viscosity is determined by other factors such as temperature and shear rate.