Wrapped bronze bearings
Long service intervals under severe operating circumstances.
Wrapped bronze bearings are ideal for applications where there are high levels of contamination. Their running surface is provided with diamond-shaped lubrication pockets or a hole pattern. The lubrication pockets must be filled with grease when the bearing is installed. The wrapped bronze bearings are produced according to the ISO 3547.
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Advantages of wrapped bronze bearings
The main advantages of wrapped bronze bearings include:
- Long service intervals
- Not affected by impurities
- Suitable for corrosive environments
- Suitable for impact loads and vibrations at low speeds
- Good heat dissipation
Applications of wrapped bronze bearings
Wrapped bronze bearings are especially suited to severe operating conditions where frequent maintenance is not possible. Common applications are:
- Agricultural vehicles
- Lifting gear
Wrapped bronze bearings are made entirely from phosphor bronze CuSn8. CuSn8 is characterized by the purity of the alloy with only a very low level of impurities. Wrapped bronze bearings are produced from strips that are subsequently wrapped and calibrated.
Wrapped bronze bearings must be lubricated with grease or oil on installation. A good quality lubricant is essential as it will reduce friction and wear by forming a film between the plain bearing and the shaft. For heavily contaminated applications, we recommend sealing off the bearing. This will protect both the bearing and the lubricant.
Detail overview of lubrication pockets
Specification overview of wrapped bronze bearings
|Max. load (Dyn/stat), N/mm2||40 / 120||40 / 120|
|Max. sliding speed m/s||2.0||2.5|
|Max. PV value N/mm2 x m/s||2.8||2.8|
|Temperature range, oC||-100 / +200||-100 / +200|
|Shaft tolerance||e7 - f8 - h6||e7 - f8 - h6|
|Shaft roughness||Ra ≤ 0.8||Ra ≤ 0.8|
|Shaft hardness||> 200 HB||> 200 HB|
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