Mechanical Engineering - Machine Design - Discussion
Discussion Forum : Machine Design - Section 2 (Q.No. 26)
26.
The metal suitable for bearings subjected to light loads is
Discussion:
3 comments Page 1 of 1.
Raj kotha said:
6 years ago
For heavy loads it is white metal.
(1)
Neeraj said:
8 years ago
One reason is phosphor bronze is an alloy of cu+tin and it more resistant to corrosion.
The general attributes of a good bearing material are:
A low coefficient of friction versus hard shaft materials, Good wear behavior against steel journals (scoring resistance) , The ability to absorb and discard small contaminant particles (embeddability) , The ability to adapt and adjust to the shaft roughness and misalignment (conformability) , High compressive strength, High fatigue strength, Corrosion resistance, Low shear strength (at the bearing-to shaft interface) , Structural uniformity, andReasonable cost and ready availability.
The tin bronzes rely mostly on tin for their strength; leaded tin bronzes additionally contain modest amounts of lead for better antifrictional properties, but at the expense of some strength; highleaded tin bronzes have the highest lubricity but the lowest strength, aluminum bronzes and manganese bronze serve applications which require their extremely high strength and excellent corrosion resistance. Members of each family have similar properties, with differences among family members allowing selection based on economic considerations or on the need to tailor alloys for particular applications.
The general attributes of a good bearing material are:
A low coefficient of friction versus hard shaft materials, Good wear behavior against steel journals (scoring resistance) , The ability to absorb and discard small contaminant particles (embeddability) , The ability to adapt and adjust to the shaft roughness and misalignment (conformability) , High compressive strength, High fatigue strength, Corrosion resistance, Low shear strength (at the bearing-to shaft interface) , Structural uniformity, andReasonable cost and ready availability.
The tin bronzes rely mostly on tin for their strength; leaded tin bronzes additionally contain modest amounts of lead for better antifrictional properties, but at the expense of some strength; highleaded tin bronzes have the highest lubricity but the lowest strength, aluminum bronzes and manganese bronze serve applications which require their extremely high strength and excellent corrosion resistance. Members of each family have similar properties, with differences among family members allowing selection based on economic considerations or on the need to tailor alloys for particular applications.
Ak46 said:
9 years ago
Why not White metal?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers