Bronze Gears

Bronze have long been an ideal material that is used for gear materials. The Bronze Gears have been seen to possess good frictional and wear properties while mating with the steel gears. They are particularly useful in cases of worm meshes and also in crossed-helical meshes, this is due to a large amount of sliding. Bronzes used for gears has good stability and displays an excellent machinability.

The Bronze can be cast, but it has been observed that bar stock and forgings are far better.One important thing to understand here is out of a vast number of bronze alloys, only a few are useful for gears. However one of the primary weakness of Bronze gears are high specific weight (highest by far, of the available gear materials) and a high cost.

Table illustrating the properties of Bronze alloys used in gear manufacture:

 

Material (ASTM No.)	Tensile Strength(psi)	Yield Strength(psi)	Elongation (%in 2")	Hardness
Aluminum Bronze - B150-2 (annealed)	100,000	60,000	25	Rockwell B90
Phosphor Bronze - B139C	80,000	45,000	33	Rockwell B80
Silicon Bronze - B98B (Hard)	65,000	35,000	10	Rockwell B80
Manganese Bronze - B138-A	80,000	65,000	25	Brinell 80

 

Application of Bronze Gears

 

Gear pumps

Many of the gear pumps uses gears made out of Bronze and a stainless steel shaft.

 

Fishing Equipment

The machine cut Bronze gears here gives an extra strength and durability.

 

Wire Drawing Machines

This particular model of Fine wire drawing machine is using Phosphorous bronze gears.

Tags:- Bronze Gear - Phosphor Bronze Gears And Bronze Gear Pumps From Gears Hub

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