Metal Alloys-Babbitt
Babbitt
Babbitt Alloy As A Bearing Material
In 1839, Isaac Babbitt received the first patent for a white metal alloy that showed
excellent bearing properties. Since then, the name babbitt has been used for other alloys
involving similar ingredients. Babbitt alloys offer an almost unsurpassed combination of
compatibility, conformability, and embed ability. They easily adapt their shapes to conform
to the bearing shaft and will hold a lubricant film. Foreign matter not carried away by the
lubrication is embedded below the surface and rendered harmless. These characteristics are
due to babbitt's hard/soft composition. High-tin babbitt alloys, for example, consist of a
relatively soft, solid matrix of tin in which are distributed hard copper-tin needles and
tin-antimony cuboids. This provides for "excellent run-in" which means the bearing
will absorb a lubricant on the surface and hold the lubricant film. Even under severe
operating conditions, where high loads, fatigue problems, or high temperature dictate the
use of other stronger materials, babbits are often employed as a thin surface coating to
obtain the advantage of their good rubbing characteristics.
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Grade 2 Babbitt Wire - For Spray Metallization
Grade 2 Babbitt wire provides effective and uniform spray metallization. It exceeds
ASTM B23 Grade 2 specification and all federal and legal guidelines for lead-free alloys.
Because the ASTM specification was developed for pouring operations, This
modified alloy with tighter impurity levels specifically for spray metallization.
Benefits of Babbitt Alloy :
- No Laminations that would cause deposition problems
- Non-splitting, virtually weld-free wire with a non-flaking surface to prevent machine
feeding problems
- Available in diameter from .057 to .187"
- Lead-free composition for environmental safety
- Produces a soft, pliable wire for easier machine feeding
- Homogenous structure and tight wire diameter provide even feeding and flame deposition.
Physical Data
| Chemical Composition (1) |
Gr. 2 Babbitt Wire |
ASTM B23 |
| Tin |
88.0 - 90.0 |
88.0 - 90.0 |
| Antimony |
7.0 - 8.0 |
7.0 - 8.0 |
| Lead |
.10 (2) |
.35 |
| Copper |
3.0 - 4.0 |
3.0 -4.0 |
| Iron |
.02 |
.08 |
| Arsenic |
.02 |
.10 |
| Bismuth |
.02 |
.08 |
| Zinc |
.005 |
.005 |
| Aluminum |
.005 |
.005 |
| Cadmium |
.001 |
.05 |
| Silver |
.02 |
not specified |
| Nickel |
.02 |
not specified |
| (1) Limits are % maximum unless shown as a range. |
| (2) Exceeds all known state and federal legislative requirements. |
| Property |
|
Gr. 2 Babbitt Wire |
| Density |
|
0.267 lbs/in3 |
| Melting range |
|
466 - 669 F |
| Brinell hardness |
@77 F |
24 |
|
@212 F |
12 |
|
@320 F |
6 |
| Tensile strength (psi) |
@77 F |
11200 |
|
@212 F |
6500 |
|
@320 F |
3000 |
Packaging:
Grade 2 Babbitt wire is available on 25 pound reels, 25 & 50 pound coils, and
100 or 300 pound pay-off-packs in diameters from 0.057 to 0.187.
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Genuine XXXX Nickel Babbitt Alloy
XXXX Nickel Babbitt Alloy is the result of over sixty years constant effort to produce the
best bearing alloy, regardless of cost. Today it stands supreme in the field of high-grade
bearing metals. It is made only of carefully selected virgin materials and each element is
subjected to scientific treatment during the alloying process.
XXXX Nickel Babbitt lasts longer under severe service, because,
- It holds the oil film
- It pours freely and fills all liner crevices
- It's anti-frictional
- It cannot cut the shaft
- It resists high temperatures
- It has high thermal conductivity
XXXX Nickel Babbitt is recommended for use in:
| Blowers |
|
Dredges |
|
Lumber Mills |
|
Rock and Gravel Machinery |
| Cement Mills |
|
Electrical machinery |
|
Marine Service |
|
Steel Mills |
| Clay Working Machinery |
|
Electric Railroads |
|
Mining Machinery |
|
Sugar Mills |
| Compressors |
|
Engines, Internal Combustion |
|
Paper Mills |
|
Turbines |
| Crushers |
|
Engines, Steam |
|
Pumps |
|
|
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