Bearing Grease Consistency White Paper in Eastmachinery

Bearing grease consistency can greatly affect the performance of the bearing and consequently the performance of the mechanical device or product.

Most people are familiar with the term "viscosity" as the measurable consistency of oil lubricants.  However, the average person probably does not know what the equivalent measurement for the consistency of grease (hint: it's not viscosity). Bearing grease consistency is measured in "penetration levels".

Eastmachinery Bearings has created a mini white paper which covers the topic of "Bearing Grease Consistency".  In it the following topics are covered:

Grease Penetration Definition
How is Unworked Penetration Measured?
How is Worked Penetration Measured?
Comparing Worked and Unworked Penetration
Channeling Grease Characteristics
Grease Consistency Plays Role in Preventing Fretting Corrosion


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New Seals Protect Bearings from Harsh Environments - Eastmachinery

Eastmachinery Bearings LLC now offers specially formulated rubber seals with unique geometries to protect 6000, 6200 and 6300 series ball bearings from moisture, wash-down chemicals, mud and dirt. Applications include outdoor environments, lawn and garden equipment, snow blowers, pumps and compressors, pulleys and idlers and rollers and conveyors.

Bearings are filled with a special grease lubricant, featuring synthetic base oil with a lithium complex thickener. The grease contains additives to protect against wear and corrosion, and can withstand temperatures from -40°C to +150°C (-40°F to +302°F). The sealed bearings meet ABEC 1 tolerances per A.B.M.A. standard 20, and have modified internal clearances that allow for easy interference fitting of both rings if desired.

A 6203 bearing, for example, could be treated with this sealing and lubricant technology and the nomenclature would be referred to as 6203-2RES. Other bearing specifications for a sealed 6203-2RES remain the same: bore diameter (17mm), outer diameter (40mm), width (12mm), static load capacity (1,070 lbs.), dynamic load capacity (2,150 lbs.), and maximum speed (9,000 rpm).

You can rely on Eastmachinery for our applications expertise and our commitment to provide exceptional service and value.  Call us with your next design… we can help with the solution.

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Spherical Bearings in Eastmachinery about Accommodating Misalignment

Spherical bearings come in many different types to accommodate a wide variety of applications. What all of them have in common is the ability to accommodate misalignment from mounting or shaft deflection.
Spherical Ball Bearings
Spherical Roller Bearings
Spherical Plain Bearings
Spherical Rod End Bearings
Spherical Ball Bearings
More commonly known as Self-Aligning Double Row Ball Bearings, spherical ball bearings are designed to work in applications where severe misalignment exists whether from mounting or shaft deflection. The concave raceway of the outer ring in combination with two rows of balls operates over a wide range of contact angles. Furthermore it aligns itself correctly with the shaft and assembly without causing undue stress on the rest of the bearing assembly. Noteworthy is that the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables it to run cooler even at high speeds. Furthermore, the design allows for easy mounting and dismounting.
Spherical Roller Bearings
Spherical Roller Bearings are designed to work in applications where severe misalignment exists whether from mounting or shaft deflection and with relatively heavy radial loads and some axial loads in either direction. They are also extremely resistant to shock loads and their self-aligning feature allows full capacity loading despite shaft deflection. They are very similar in purpose to Self-Aligning Double Row Ball Bearings, except the Spherical Roller Bearings are designed to be more robust by carry heavier loads but at lower maximum speeds.
Spherical Plain Bearings
Spherical Plain Bearings (also known as “Spherical Plane Bearings” “Spherical Ball Bushing Bearings” and “Ball Bushings”) are spherical bearings that have an inner ring with a sphere convex outside surface and an outer ring with a correspondingly sphere, but concave inside surface. Their design makes them particularly suitable for bearing arrangements where alignment movements between shaft and housing have to accommodate, or where oscillating or recurrent tilting movements must be permitted at relatively slow sliding speeds.
Spherical Rod End Bearings
A Rod End is spherical bearing that consists of an eye-shaped head with integral shank forming a housing and a standard spherical plain bearing, or a spherical plain bearing inner ring, or a spherical plain bearing inner ring and a sliding layer between the bore of the head and the inner ring. As the name implies, they are used at the end of rods and have either a male or female thread for mounting.
Which Is Best for Shaft Misalignment?
If you need help in selecting how to best accommodate for shaft misalignment and which products may be best for your particular application, please remember that design engineering and application assistance are available from Eastmachinery as part of our value-added services designed to make your job easier.  Contact us for more information.
Category: Ball Bearings, Bearings - General, Roller Bearings, Spherical Plain Bearings
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Eastmachinery Bearing Design Considerations for the Food Processing Industry - Seals

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In the fifth (and final) portion of our examination of bearing considerations in the food processing industry, we will be taking a closer look at seals. In food processing plants, bearings are continuously exposed to liquids and various types of particulate debris. Sealed or shielded bearings are the best option for keeping foreign debris out of the interior of the bearing and keeping lubricant in.
The most common bearing seal material is a nitrile rubber. This type of seal is typically Buna-N bonded to a steel insert. The seal is fixed into a groove in the outer ring. The maximum operating temperature is 240° F. This type of seal makes contact with the inner ring providing better protection in contaminated environments than a metal shield. However, this results in an increase in torque and reduces the maximum speed capability of the bearing, but in almost all cases is a design tradeoff that improves the product life.
Certain lubricants and chemicals react with rubber. Aside from the Buna-n and nitrile rubber material, other materials are available for higher temperatures and chemical resistance. These include FDA approved silicone rubber seals that can handle a maximum temperature of 400° F and Viton that has good chemical resistance and a maximum operating temperature of 400° F.
The seal construction can greatly improve its ability to function in extreme environments. Seals can be shrouded in metal, such as stainless steel or galvanized steel. Often called slingers, this type of seal is often found on mounted bearings and the metal shroud helps protect the rubber from abrasion.
The portion of the seal that contacts the inner ring of the bearing is known as the seal lip. Seals can be designed as single, double or triple lips. The seal lips flare out where the contact the ring provides effective protection against lubricant loss and wet or particulate contaminants. Triple lip seals provide the most protection, but also increase rotational torque substantially compared to single lip designs.
When lower torque is a design requirement, a non-contact rubber seal based on the labyrinth effect can be utilized. These seals function by creating a path the fluid or debris must navigate in order to penetrate the seal. In bearings, this is typically just a groove in the inner ring. A contact lip seal can be used very effectively in combination with a labyrinth design to provide excellent protection and low torque.
Teflon and glass reinforced PTFE seals are an excellent material choice in food processing applications. They have outstanding chemical resistance, high and low-temperature capability and exhibit less torque than rubber seals. However, depending on the type of bearing and their construction, these seals are not as robust and can be dislodged if hit directly with a high-velocity stream of fluid.
Keep in mind, the seals found on most types of bearings are not designed for immersion and fluid penetration will eventually take place. They offer excellent protection from particulate contaminants or a fluid splash and wipe down situation.
In the food processing industry, bearing life is a major factor contributing to uptime and reliability. The environments bearings encounter in these applications are extremely harsh. Bearings are selected based in operational loads and desired life, but designers must also give careful consideration to protecting bearings from corrosion and contamination and maximizing lubricant life.
As evidenced, there are a wide range of bearing options to take into account for optimal application performance. Food processing engineers and designers are advised to consult a bearing applications specialist for assistance with calculating environmental factors, load capacity, bearing life and attributes.
Due to the wide array of products along with price and availability, both a lubrication specialist and the bearing manufacturer should be consulted before making a final lubricant selection.
There are a wide range of lubrication options to take into account for optimal application performance. Food processing engineers and designers are advised to consult a bearing applications specialist for assistance to best navigate these regulations.
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Bearing Spotlight Eastmachinery - Miniature Linear Way Series

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Linear way bearings incorporate several rows of recirculating balls or rollers for low friction and precise linear motion and have a rectangular shaped track. Made of stainless steel, and with a wide range of variations in shapes and sizes, the LWL Series offered by AST Bearings are widely used in such fields as medical equipment, semiconductor manufacturing equipment, and liquid crystal related equipment.

The LWL Series is a miniature type linear motion rolling guide, incorporating two rows of steel balls arranged in four-point contact with the raceways. Owning to its simple design, it provides stable accuracy and rigidity even in operations under fluctuating loads with changing direction and magnitude or complex loads.
The simple two-row, four-point contact design minimizes the number of potential errors in manufacturing and measurement, so the highest level of dimensional accuracy between rows can be achieved. Interchangeable specification products of high-interchangeability level can be manufactured benefiting from this feature by rigorous control of the dimensional accuracy of individual slide units and track rails.

If you need help in selecting the best products for your particular application, please remember that design engineering and application assistance are available from AST as part of our value-added services designed to make your job easier.

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Eastmachinery - Miniature Linear Way Series by Bearing Spotlight

Linear way bearings incorporate several rows of recirculating balls or rollers for low friction and precise linear motion and have a rectangular shaped track. Made of stainless steel, and with a wide range of variations in shapes and sizes, the LWL Series offered by Eastmachinery Bearings are widely used in such fields as medical equipment, semiconductor manufacturing equipment, and liquid crystal related equipment.

The LWL Series is a miniature type linear motion rolling guide, incorporating two rows of steel balls arranged in four-point contact with the raceways. Owning to its simple design, it provides stable accuracy and rigidity even in operations under fluctuating loads with changing direction and magnitude or complex loads.

The simple two-row, four-point contact design minimizes the number of potential errors in manufacturing and measurement, so the highest level of dimensional accuracy between rows can be achieved. Interchangeable specification products of high-interchangeability level can be manufactured benefiting from this feature by rigorous control of the dimensional accuracy of individual slide units and track rails.

If you need help in selecting the best products for your particular application, please remember that design engineering and application assistance are available from Eastmachinery as part of our value-added services designed to make your job easier.



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Important thing about Professional Mechanized Platform - Eastmachinery

Eastmachinery.com is a professional mechanized trading online platform which to help the small and medium machinery manufacturers and brands develop new markets. Our platform shorten the trade supply chain through the Internet, to help machinery enterprises to obtain greater profits. Eastmachinery.com was founded in May 2015, there is provided in English and Russian, it has covered more than 200 countries and territories currently.

Our company slogan is "From factory to you".

Eastmachinery uphold the the mission "Make Trade Easier!" to build a bridge between the outstanding domestic machinery manufacturers and foreign buyers and to provide quality, best service, the lowest price of the one-stop shop for users worldwide shopping experience.

Best Quality: selection of the best products in the best manufacturers from China, to provide users with the best quality products;

Best Service: intimate online service, professional and technical personnel to bring the most timely service;

Lowest Price: Let the Chinese suppliers and buyers direct docking terminal.

Article Source: Eastmachinery.com

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