Material - Sintered Bronze (copper-tin alloy). They are self-lubricating, making them maintenance-free. High wear-resistant and corrosion-resistant..
Function - The bushings can be used for different purposes, such as positioning, wear and vibration reduction, or to isolate the shaft from special media to increase the life of the shaft..
Application - Bronze bushings are most for general-purpose where moderate speeds and loads are present. Sleeve bearings are used in a vast variety of industrial equipment..
More - They also can be used for reducing bore diameter or replacing worn-out original bushings on wheels..
SHIMANO RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur (Use with 11-32/11-36 Cassette)
Shadow Plus technology keeps the low profile shape reducing chainstay and other contact, and adds a chain tensioning device reducing noise and dropped chains.
Compatible with Dyna-Sys 10 speed Shimano products.
Aluminum construction with sealed bearing pulleys.
4 fluoric coated link pivot bushings for smooth operation.