10 hot questions about graphite copper sleeves

Graphite copper sleeve is a copper-based bushing product in which graphite is embedded as a lubricant after opening holes in the copper sleeve. It combines the high load-bearing and wear resistance of the copper sleeve with the lubrication and low friction of graphite. It also has excellent processability and customization, and can be made into any type. The manufacturing cost of graphite copper sleeves is equivalent to or slightly lower than that of copper sleeves, and its service life is much longer than that of copper sleeves. The maintenance cost is much lower than that of traditional copper sleeves. Therefore, graphite copper sleeves are far superior to traditional copper sleeves in many aspects such as product performance, customizability, manufacturing cost, maintenance cost, etc., and are a perfect substitute for copper sleeves in most working conditions.

Graphite copper sleeves have the characteristics of high load-bearing capacity, impact resistance, high temperature resistance, and strong self-lubricating ability. They are especially suitable for heavy loads, low speeds, reciprocating or swinging situations where lubrication and oil film formation are difficult, and are not afraid of erosion and erosion by water and other acids.

Graphite copper sleeves

Several common questions about graphite copper sleeves:

The load-bearing performance of graphite copper sleeves and traditional copper sleeves depends on the matrix material. The load-bearing properties of different materials are different.

When using the same material, the load-bearing performance of graphite copper sleeves is equivalent to that of traditional copper sleeves, because although about 25% of the inner hole of the graphite copper sleeves is inlaid with graphite, traditional copper sleeves generally move relative to each other for lubrication. If a certain area of oil tank is arranged on the surface, coupled with the design redundancy, there will not be much difference in load-bearing performance between the two;

Copper based graphite thrust gasket

The graphite copper sleeve has excellent self-lubricating bearing properties and can show good low friction even without oil. At the same time, the graphite copper sleeve is fully compatible with various lubricating media. With the assistance of oil lubrication or grease lubrication, it can The coefficient of friction will be lower, the amount of wear will be smaller, and the service life will be longer;

Copper sleeves inlaid with graphite are not recommended for use underwater, but Mingxu Bearing has developed and produced inlaid copper sleeve products with polytetrafluoroethylene inlaid on the copper sleeve base, which can be used underwater. Polytetrafluoroethylene (PTFE), also known as Teflon, has excellent water lubricity and corrosion resistance. Whether in seawater or fresh water, it can effectively ensure the reliability of the shaft sleeve when working underwater;

The maximum operating temperature of graphite copper sleeves can reach over 400°C, and they have been widely used in metallurgy, boilers and other high-temperature working conditions;

The base material of the graphite copper sleeve has a variety of copper alloy grades to choose from according to different usage conditions. At the same time, Mingxu Bearing also provides steel-copper bimetallic substrates, bearing steel, carbon steel, stainless steel, cast iron and other different metal substrates for users to choose from;

There are generally two types of lubricants for graphite copper sleeves. One is graphite-based lubricant, which is suitable for atmospheric environments; the other is polytetrafluoroethylene lubricant, which is suitable for underwater and vacuum environments;

Copper-based inlaid self-lubricating spherical plain bearings

The life of the graphite copper sleeve depends on the copper sleeve material and operating conditions. If the user can provide detailed operating conditions parameters, Mingxu Bearing's professional engineers can assist you in calculation and selection.

Compared with traditional copper sleeves of the same base material, the service life of graphite copper sleeves can be more than doubled under non-oiling conditions;

Graphite copper sleeves have flexible processability, and in most cases no mold costs are required. The minimum order is one piece, and can be customized according to user requirements, including but not limited to base material, lubricant model, shape, etc.;

Thrust flange graphite copper sleeve

Theoretically, as long as a certain wall thickness is ensured, feasible processing equipment and sufficient processing space are available, any type can be customized. Including but not limited to straight sleeves, flanged sleeves, bearings, inner spherical surfaces, outer spherical surfaces, ball bowls, gaskets, skateboards, guide rails, spherical bearings and other non-standard any types customized according to drawings;

Theoretical weight is the most important factor in determining the price of graphite copper sleeves (theoretical weight = volume of graphite copper sleeves * density of copper alloy matrix). The composition of the price also depends on the material cost and processing cost.

The raw material costs of different brands of base materials are different, and the processing costs of products of different specifications and types are also different. Price lists are available for general standards, while non-standard customized specifications are calculated based on actual conditions.

Graphite copper half-bearing