What Are the Different Types of Molybdenum Grease?

English name of grease: lubricating grease; grease thick semi-solid. It is used in the friction part of the machine for lubrication and sealing. It is also used on metal surfaces to fill voids and prevent rust. It is mainly composed of mineral oil (or synthetic lubricating oil) and thickener.

grease

English name of grease: lubricating grease; grease thick semi-solid. It is used in the friction part of the machine for lubrication and sealing. It is also used on metal surfaces to fill voids and prevent rust. Mainly by

According to the thickener, it can be divided into two types: soap-based fat and non-soap-based fat. Thickener for soap base grease

The role of grease is mainly to lubricate, protect and seal.

Grease varieties are complex,

Grease is mainly composed of thickener,

Product types that can be replaced by grease: Lithium-based grease, calcium-based grease, aluminum-based grease, composite lithium-based grease, composite aluminum-based grease, high-temperature grease, low-temperature grease wheel bearing grease, multifunctional grease, electric motorcycle grease , Insulating grease, bearing grease, grease for O-rings. Under the following conditions, it is recommended to use Super Lube high temperature extreme pressure grease instead of Super Lube multifunctional synthetic grease: The operating temperature is high, when the operating temperature exceeds 260 degrees, most of the base oil will evaporate, which cannot form sufficient lubricating film strength Need to use some solid additives such as lead, aluminum, copper and molybdenum. Main application environment: high temperature furnace, automatic welding equipment and pure oxygen environment. Although Super Lube is difficult to burn. But pure oxygen environment will accelerate its oxidation. If Super Lube Multifunctional Synthetic Grease is used in a pure oxygen environment, it will ignite spontaneously. Such situations as: oxidation welding equipment, medical equipment, diving navigation breathing system, etc., please use our high temperature extreme pressure grease.

1. Age Hardening

The phenomenon that the consistency of grease increases with storage time (hardening).

2. Apparent viscosity

The ratio of the shear stress to the deceleration of a non-Newtonian fluid calculated in accordance with the Poiseuille equation in Poise. The apparent viscosity of most greases varies with shear rate and temperature, so the measured value deceleration and temperature must be reported. Apparent viscosity, some also translated as "similar viscosity."

3. Appearance

Use only visual inspection methods to see the characteristics of the grease. This term usually includes: Bulk Appearance, Texture, Bloom, Color, and Luster.

The overall appearance refers to the appearance of the unstirred fat when viewed in an opaque container. The overall appearance should be described in terms of: Smooth, Rough, Grainy, Cracked, and Bleeding.

Texture refers to the properties of the grease observed when a small amount of grease is pressed together and then slowly separated. The texture should be described by the following terms: Brittle, Buttery, Long fiber, Resilient, Stringy, etc.

Fluorescence refers to the color of the surface of the fat (usually blue or green) as observed by sunlight reflection from a direction of about 45 ° from the surface of the fat. Fluorescence is related to the ultraviolet light absorbed in the oil and may not be visible when viewed under an artificial light source.

The color of grease is usually the hue and intensity of the grease when it is observed under the condition of eliminating fluorescence. The color of the grease is described by its main color, such as amber, brown, etc., and some restrictive adjectives such as "light", "medium", "dark", etc. are used to describe the intensity of the color. Some fats are added with dyes, which can be described by green, red, blue and so on.

Gloss refers to the intensity of the light reflected by the fat surface. It is often described in the following terms: bright, dull, etc.

4. Consistency

Consistency refers to the degree to which plastic materials resist deformation under the action of external forces. Just as viscosity is a characteristic of fluidity, consistency is a characteristic of plasticity. Consistency is usually expressed in terms of penetration.

5. Dispensability

It indicates how easy it is for grease to reach the point of use from its container, such as a storage tank. This concept is often used when discussing concentrated lubrication of grease. Distributability includes pumpability and feedability. Pumpability is usually measured by the apparent viscosity at a medium shear rate, and the feed capacity is the ability of the grease to flow to the suction pipe of the distribution pump at a speed at least equal to the pump's delivery capacity.

Carburizing mold compatible. ^[1]

In the environment of strong chemical media, chemical resistance such as fluorocarbon grease should be selected.

Grease is a colloid. The structure of grease in use and storage will change due to various external factors.

When stored in the warehouse, the temperature should not be higher than 35 , and the packaging container should be sealed to prevent leakage of moisture and foreign impurities.

After opening the barrel to take samples or products, do not leave holes in the packaging barrel. The surface of the fat after taking the sample should be smoothed to prevent pits, otherwise the base oil will be squeezed by natural gravity and penetrate into the sample The pits affect the quality of the product.

1. The amount to be added should be appropriate

If the amount of grease is too large, the frictional torque will increase, the temperature will rise, and the amount of fat will increase. If the amount of grease is too small, reliable lubrication will not be obtained and dry friction will occur. In general, the appropriate amount of grease is 1/3 to 1/2 of the total void volume in the bearing.

Estimation formula: Q = 0.005 x D x B

Qfilling amount, unit g

Dbearing outer diameter, unit mm

Bbearing width, unit mm

2. Prohibit mixed use of different brands of grease

Because the thickeners, base oils and additives used in greases are different, mixing will cause changes in the colloid structure, which will increase the oil separation, change the consistency, and mechanical stability.

3. Pay attention to the fat change cycle and use process management

Pay attention to replenishing and replacing grease regularly. When adding new grease, squeeze out the waste grease until you see new grease at the grease outlet. Keep the greasing process clean to prevent the inclusion of mechanical impurities, dust and grit.