SKF solid bronze bushings

SKF solid bronze bushings are suitable for a wide range of operating conditions and applications. The solid bronze material is particularly well suited for highly demanding applications in tough environments. SKF offers a standard assortment of both straight and flanged solid bronze SKF bushings. Advantages of these bushings include:

• insensitive to dirty environments
• resistant to shock loads and vibrations at low speeds
• possibility to operate with lower quality shaft finish
• good resistance to corrosive contaminants
• equipped with grooves to retain lubricant

Robust bushing material; less sensitive to misalignment; can be lubricated with oil or grease; lubricant not only improves the sliding properties, but also reduces wear and prevents corrosion; those with bore diameter d > 14 mm incorporate an axial lubrication groove; available in metric sizes as straight or flanged bushings.

SKF solid bronze bushings material

SKF solid bronze bushings are made of a multi-component bronze, CuSn7Zn4Pb7-B, which has very good sliding properties. All surfaces of a solid bronze bushing are machined.

SKF solid bronze bushings main applications

SKF solid bronze bushings are intended for oscillating movements in both radial and axial directions. They are also suitable for applications where rotating speeds are low. Application area examples for these bushings are: 

• construction machinery
• transport equipment
• pulp and paper making machinery
• offshore equipment 

SKF solid bronze bushings lubrication

SKF solid bronze bushings can be lubricated with either oil or grease. The lubricant not only improves the sliding properties, but also reduces wear and prevents corrosion. While oil is used in exceptional cases, solid bronze bushings are typically grease lubricated.

To protect the bushing and lubricant, seals are recommended in highly contaminated environments.

All bushings with a bore diameter > 14 mm incorporate an axial lubrication groove.

SKF solid bronze bushings are available both as straight and flanged bushings.
Designation: PBM, PBMF

Characteristics
Permissible load (dyn/stat), N/mm²: 25 / 45
Permissible sliding velocity, m/s: 0,5
Friction coefficient m (greased): 0,08 .. 0,15
Temperature range, °C: –40 .. +250

Application recommendations
Shaft tolerance: e7 – e8
Housing tolerance: H7
Shaft roughness Ra, mm: 0 .. 1,0
Shaft hardness, HB: 165 – 400