SKF wrapped bronze bushings

SKF wrapped bronze bushings are particularly well suited for applications where high levels of contamination make relubrication necessary. The sliding surface of these bushings contains diamond shaped pockets that serve as reservoirs to progressively release lubricant during operation and, therefore, initially need to be filled with grease. SKF offers a wide range of both straight and flanged wrapped bronze bushings. Advantages of these bushings include: 

• insensitive to contaminated environments 
• resistant to shock loads and vibrations at slow speeds 
• good resistance to corrosive environments

Excellent in dirty environments due to lubrication pockets, which initially need to be filled with grease; available in metric sizes as straight or flanged bushings.

SKF wrapped bronze bushings are well suited for machinery that operates in highly contaminated environments and where shock loads and/or vibrations occur. Application area examples for these bushings are: 

• agricultural machinery 
• hoisting equipment 
• construction machinery 
• forestry machinery

SKF wrapped bronze bushings material

SKF wrapped bronze bushings are made entirely of bronze, CuSn8. The bushings are produced from strips which are then wrapped and calibrated.

Lubrication

Whether grease or oil is used, a good quality lubricant will reduce friction and wear by separating a bronze bushing from its shaft. To protect the bushing and lubricant in highly contaminated environments, SKF recommends using seals.

SKF wrapped bronze bushings are available both as straight and flanged bushings.

Characteristics
Permissible load (dyn/stat), N/mm²: 40 / 120
Permissible sliding velocity, m/s: 1,0
Friction coefficient m (greased): 0,08 .. 0,15
Temperature range, °C: –40 .. +150

Application recommendations
Shaft tolerance: e7 – f8
Housing tolerance: H7
Shaft roughness Ra, mm: 0,4 .. 0,8
Shaft hardness, HB: 150 – 400