SAE 841 Sintered Flanged Bushings / Bearings
SAE 841 Sintered Bronze Flange Bushings are rigid, temperature resistant and high strength bushings formed through the process of sintering, or powder metallurgy. Powder metallurgy uses a number of different metals including
aluminum, copper, nickel, brass, steel, stainless steel, nickel and
titanium in the fabrication of powdered metal parts.
metal parts have a proven record of unexcelled wear resistance and long
life. They hold closer tolerances and can be made self-lubricating
through oil impregnation. Because of smoother action and self-dampening
features, powder metal assures a quiet operation.
The process of powder
metallurgy has (3) basic steps:
- First, the metal, in this case, bronze
or bronze alloy, is made into a powdered form. This can be achieved by a
number of methods including grinding, chemical decomposition and the
most common atomization.
- The metallic powder is then poured into a die
or mold cavity and compacted under great pressure in order to adhere the
particles. This occurs at room temperature.
- The metal part is then
inserted into a furnace where the extreme heat fuses the metal particles
together to form a rigid, high strength and porous component. This part
of the process is called sintering.
The resulting porosity of the
sintered parts makes powder metal products especially useful in
lubricating applications and as a result, bearings and wear plates are
often fabricated from sintered bronze. Powdered metal offer both
strength and flexibility. Additionally, they offer a cost effective
production process that includes oil impregnation or permanent
- ASTM - B438, Grade 1, Type II
- MPIF - CT-1000-K26
- Military - MIL-B-5687D, Type I, Grade I (This spec only applies to Bushings & Washers. It must be requested at time of quotation. Please call for more information, 800-478-0887)
Heavy industry uses
Sintered Bronze as machinery components, as self-lubricating pump parts,
and as turbine blades. The military depends on them for reliability in
weapons and aircraft; and the technique is used to fabricate exotic
materials for space vehicles. Also used in shock absorbers, home
and as well as most commonly as bearings or bushings, sintered bronze
parts can be produced in large quantities with consistent properties and