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Technical details LUB-MET®
- Specific load capacity static 150 [N/mm2]
- Specific load capacity dynamic 100 [N/mm2]
- Sliding speed ≤ 0.3 to 1.0 [m/s]
- Friction value 0.03 [µ] to 0.2 [µ] lubricated/dry
- Temperature strain - 100 [°C] to + 300 [°C]
- Max. PV-value 1.5 [N/mm² x m/s]
- Hardness: 190-220 HB
- Support material CuZn25Al5
- Sliding layer Solid lubricant surface: app. 25-30%
- Other commonly used bronze alloys: CuAl10Ni, CuSn12Pb, CuSn7ZnPb
- Housing Ø H7
- Bushing inner-Ø after mounting Pls consult our sales engineers, standard delivered tolerance: r6 or E7
- Shaft tolerance f7 or h6
- The shaft hardness should be at least 70-100HB harder than the bronze alloy.
Surface roughness ≤ Ra 0.8
- LUB-MET® fullfills the highest operational demands and is suitable for shock loads. Depending on the alloy, it is corrosion-resistant and also highly wear-resistant with a long life span.
Range of application
- Cranes, mining machines, construction machinery, off-shore & marine applications, steel plant, hydro power & hydro mechanical
- LUB-MET® is a maintenance-free bearing material, but an initial greasing is mandatory for the “running-in”process. A lithium aging-resistant grease should be used.
- Housing: Chamfer min. 1.5 mm x 15-45°, for easy bushing alignment
Shaft: Chamfer 5 mm x 15°, for easy insertion of the shaft
- For smaller diameters, the OD should be greased before pressing in.
For larger diameters dry ice for freeze fitting should be used.
- LUB-MET plain bearings are made of a bronze base which is refined with a solid lubricant pattern, making it a self-lubricating bearing for a wide field of applications.
The bronze base is offered in various alloys, from leaded bronze, over phosphor bronze to aluminium bronze. Each alloy has different capabilities and makes LUB-MET applicable for operating conditions, where extremely high loads in combination with slow speeds apply or in applications where faster speeds with medium loads occur.
The solid lubricant plugs are available in two different types. SL1 lubricant plugs are made of Graphite and are applicable in dry environments, whereas SL4 is made of PTFE, waxes and fillers, is suitable for applications where the bearing works in moist environments or even entirely submersed under (sea-) water.
The self-lubrication ability of the LUB-MET bearing is created by a thin dry lubricant layer, which is generated by micro-wear of the bearing’s sliding surface.
LUB-MET is a self-lubricating material and performs very well without any additional lubricant. However, if desired, it may also be lubricated with grease or oil. This will be beneficial if LUB-MET bearings run in contaminated applications, where grease can flush out particles which might have entered the bearing’s contact area. Grease is also advised to keep pins preserved when the bearing works in a corrosive environment. Grease/Oil lubrication also increases the capability of LUB-MET to run on higher velocities, as it reduces the heat generation on the bearing’s sliding surface.
The idea of self-lubricating bronze goes back to the 1970’s but still until today, this type of material remains a popular choice due to its long-term experience in one of the most challenging applications in industries such as hydro-power, offshore, oil and gas, manufacturing and many more.
* For higher requirements – e.g. higher temperature ranges – different materials are available in this category.
** The listed values in the material properties are valid for optimal operating conditions. By changing the conditions of application, e.g. an increase in the sliding speed or strain, these values could shift.