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White Metal Bearing Alloys |
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Small Order Pricing
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In selecting the proper type of Babbitt for a
particular job there are a number of factors to take into consideration,
the most import of which are as follows:
1. Surface speed of the SHAFT
2. Load bearing is required to carry
Secondly, but no less important, the following points must also be
taken into account:
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A. Continuity of service |
D. Lubrication |
| B. Bonding possibilities |
E. Cleanliness |
| C. Cooling facilities |
F. Attention given to the bearings in question |
There is no doubt that if a bearing be highly loaded in relation to
its size, a high tin alloy is desirable; whereas for much slower speed
work and less heavily loaded bearings, a lead-base one may be employed,
and is far more economical.
1. Surface speed of the shaft: (The number of feet
traveled per minute by the shaft circumferentially.) |
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Pi = 3.1416 |
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Formula: |
Pi x D x RPM |
= S |
D = Diameter of Shaft |
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12 |
RPM = Revolutions Per Minute |
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S = Surface speed of the Shaft |
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Example: |
Determine the
surface of a 2 inch diameter shaft going 1,400 RPM |
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Pi x D x RPM |
= 3.1416 x 2 x 1,400 = 733.04
Ft/min |
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12 |
12 |
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| 2. Load Bearing
is required to carry: (The weight which is being exerted through the
combined weights of the shaft and any other direct weights on the shaft
and measured in pounds per square inch.) |
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W = Total weight carried by
bearing |
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Formula: |
___W___ |
= L |
I.D = Inside diameter of
bearing |
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I.D x L.O.B. |
L = Load bearing required to
carry |
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L.O.B = Length of Bearing |
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Example: |
Determine the load
on a bearing of a 2 inch I.D bearing,
5 inches long and carrying a weight
of 3,100 lbs |
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_____W_____ |
= 3,100 =
310 Lbs/sq.in |
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I.D x L.O.B. |
2 x 5 |
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ASTM Alloy Number |
Yield Point, psi
D (MPa) |
Johnson's Apparent
Elastic Limit psi (MPA) E |
Melting Point oF
(oC) |
Proper Pouring
Temp oF(oC) |
|
68oF(20oC) |
212oF(100oC) |
68oF(20oC) |
212oF(100oC) |
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1 |
4400 (30.3) |
2650 (18.3) |
2450 (16.9) |
1050 (7.2) |
433 (223) |
825 (441) |
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2 |
6100 (42.0) |
3000 (20.6) |
3350 (23.1) |
1100 (7.6) |
466 (241) |
795 (424) |
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3 |
6600 (45.5) |
3150 (21.7) |
5350 (36.9) |
1300 (9.0) |
464 (240) |
915 (491) |
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7 |
3550 (24.5) |
1600 (11.0) |
2500 (17.2) |
1350 (9.3) |
464 (240) |
640 (338) |
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8 |
3400 (23.4) |
1750 (12.1) |
2650 (18.3) |
1200 (8.3) |
459 (237) |
645 (341) |
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15 |
no data |
no data |
no data |
no data |
479 (248) |
662 (350 ) |
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D The values of yield point were taken
from stress-strain curves at deformation of 0.125% of gage length |
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E Johnson's apparent elastic limit is
taken as the unit stress at the point where the slope of the tangent to
the curve is 2/3 times its slope in origin |
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There are many formulas for standard grade babbitt but they
fall into two main classifications: |
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Babbitt Classification |
LIMITS |
Surface Speeds
(# of Ft/min) |
LOAD
(Lbs/Sq.In.) |
| MIN. |
MAX. |
MIN. |
MAX. |
| Tin-Based Babbitts |
1,000 |
2,400 |
100 |
2,000 |
| Lead Based Babbitts |
100 |
1,000 |
100 |
500 |
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Tin Based Alloys - Chemical
Composition (%) Chart |
| INDUSTRY NAME |
ASTM B23 |
QQ-T-390A |
Sn
(Tin) |
Sb
(Antimony) |
Cu
(Copper) |
Pb
(Lead) |
| Marine 11 D |
- |
- |
90.0 - 92.0 |
4.5 - 5.5 |
3.5 - 4.5 |
0.35 (Max) |
| No. 1 |
Grade 1 |
No. 1 |
90.0 - 92.0 |
4.0 - 5.0 |
4.0 - 5.0 |
0.35 (Max) |
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NF A 56-101 (Code
101) |
- |
- |
89.0 - 91.0 |
5.75 – 7.25 |
2.75 – 4.25 |
0.35 (Max) |
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NF A 56-101 (Code
111) |
- |
- |
89.0 - 91.0 |
5.75 – 7.25 |
2.75 – 4.25 |
0.10 (Max) |
| Marine 11R |
- |
- |
89.0 - 89.5 |
7.5 - 8.5 |
2.5 - 3.0 |
0.35 (Max) |
| Nickel Genuine |
Grade 2 |
No. 2 |
88.0 - 90.0 |
7.0 - 8.0 |
3.0 - 4.0 |
0.35 (Max) |
| Marine 11 |
- |
- |
88.0 - 90.0 |
5.5 - 6.0 |
5.0 - 5.5 |
0.35 (Max) |
| 4X Royal Nickel Genuine |
- |
- |
87.5 - 89.5 |
7.25 - 7.75 |
3.25 - 3.75 |
0.35 (Max) |
| Diesel Special |
- |
- |
87.5 - 88.0 |
6.5 - 7.0 |
5.0 - 6.0 |
0.35 (Max) |
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NF A 56-101 (Code
102) |
- |
- |
87.0 - 89.0 |
6.75 – 8.25 |
2.75 – 4.25 |
0.35 (Max) |
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NF A 56-101 (Code
112) |
- |
- |
87.0 - 89.0 |
6.75 – 8.25 |
2.75 – 4.25 |
0.10 (Max) |
| Grade 11 |
Grade 11 |
- |
86.0 - 89.0 |
6.0 - 7.5 |
5.0 - 6.5 |
0.35 (Max) |
| SAE 11 |
- |
- |
85.0 - 87.0 |
7.0 - 8.0 |
6.0 - 7.0 |
0.35 (Max) |
| Imperial Genuine |
- |
- |
85.0 - 87.0 |
6.5 - 7.5 |
6.5 - 7.5 |
0.35 (Max) |
| Turbine |
- |
- |
84.0 - 86.0 |
6.5 - 7.5 |
7.5 - 8.5 |
0.35 (Max) |
| Royal Armature |
- |
- |
83.5 - 84.0 |
8.0 - 8.5 |
7.5 - 8.5 |
0.35 (Max) |
| Super Tough |
Grade 3 |
No.
3 |
83.0 - 85.0 |
7.5 - 8.5 |
7.5 - 8.5 |
0.35 (Max) |
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NF A 56-101 (Code
103) |
- |
- |
82.0 - 84.0 |
10.25 – 11.75 |
5.25 – 6.75 |
0.35 (Max) |
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NF A 56-101 (Code
113) |
- |
- |
82.0 - 84.0 |
10.25 – 11.75 |
5.25 – 6.75 |
0.10 (Max) |
| No. 4 |
- |
No. 4 |
80.5 - 82.5 |
12.0 - 14.0 |
5.0 - 6.0 |
0.35 (Max) |
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NF A 56-101 (Code
104) |
- |
- |
79.0 - 81.0 |
9.25 – 10.75 |
9.25 – 10.75 |
0.35 (Max) |
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NF A 56-101 (Code
114) |
- |
- |
79.0 - 81.0 |
9.25 – 10.75 |
9.25 – 10.75 |
0.10 (Max) |
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NF A 56-101 (Code
106) |
- |
- |
79.0 - 81.0 |
11.25 – 12.75 |
5.00 – 7.00 |
1.5 – 2.5 |
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NF A 56-101 (Code
105) |
- |
- |
77.0 - 79.0 |
12.25 – 13.75 |
8.25 – 9.75 |
0.35 (Max) |
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NF A 56-101 (Code
115) |
- |
- |
77.0 - 79.0 |
12.25 – 13.75 |
8.25 – 9.75 |
0.10 (Max) |
| Grade 4 |
Grade 4 |
- |
74.0 -
76.0 |
11.0 -
13.0 |
2.5 - 3.5 |
9.3 - 10.7 |
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NF A 56-101 (Code
107) |
- |
- |
73.0 - 75.0 |
6.00 – 8.00 |
3.00 – 5.00 |
3.00 – 5.00 |
| No. 5 |
- |
No. 5 |
61.0 - 63.0 |
9.5 - 10.5 |
2.5 - 3.5 |
24.0 - 26.0 |
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Maximum Allowable
Impurities: Fe=0.08, As=0.10, Bi=0.08,
Zn=0.005, Al=0.005, Cd=0.05
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Lead Based Alloys - Chemical
Composition (%) Chart |
| INDUSTRY NAME |
ASTM B23 |
QQ-T-390A |
Sn
(Tin) |
Sb
(Antimony) |
Pb
(Lead) |
As
(Arsenic) |
| Choker |
- |
- |
- |
6.5 - 7.5 |
92.0 - 94.0 |
0.20 |
| Durite |
Grade 15 |
No. 10 |
0.8 - 1.2 |
14.5 - 17.5 |
Balance
|
0.8 - 1.4 |
| Hardware No. 4 |
- |
- |
1.0 - 2.0 |
12.3 - 14.3 |
84.2 - 86.2 |
0.20 |
| Silverstone |
- |
- |
1.0 - 3.0 |
17.5 - 18.5 |
Balance |
0.25 (Max) |
| No. 13 |
- |
No. 13 |
4.0 - 6.0 |
8.0 - 10.0 |
83.0 - 88.0 |
0.20 |
| Mill Anchor |
- |
- |
4.0 - 6.0 |
11.5 - 12.5 |
Balance |
0.25 (Max) |
| Royal |
Grade 8 |
No. 6 |
4.5 - 5.5 |
14.0 - 16.0 |
Balance
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0.30 - 0.60 |
| Star |
- |
- |
5.0 - 5.5 |
13.5 - 14.5 |
Balance |
0.30 - 0.60 |
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NF A 56-101 (Code
201) |
- |
- |
5.0 - 7.0 |
14.0 – 16.0 |
77.0 – 79.0 |
(0.5-1.0 Cu) |
| Grade 13 |
Grade 13 |
- |
5.5 - 6.5 |
9.5 - 10.5 |
Balance
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0.25 (Max) |
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NF A 56-101 (Code
202) |
- |
- |
9.0 - 11.0 |
14.0 – 16.0 |
74.0 – 76.0 |
(0.5-1.0 Cu) |
| No. 11 |
- |
No. 11 |
9.0 - 11.0 |
11.5 - 13.5 |
74.0 - 79.0 |
0.20 |
| Sawguide |
- |
- |
9.0 - 11.0 |
18.5 - 19.5 |
Balance |
0.25 (Max) |
| Heavy Pressure |
Grade 7 |
No. 7 |
9.3 - 10.7 |
14.0 - 16.0 |
Balance
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0.30 - 0.60 |
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Maximum Allowable
Impurities: Cu=0.50, Fe=0.10, Bi=0.10, Zn=0.005,
Al=0.005, Cd=0.05
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Available in the
following Bars Sizes:
1.75Lb Cast Bar
-
8Lb Nolan Bar- ** Most Popular **
© 2001-2011 Alchemy Castings
(1464012 Ontario Inc.) & Alchemy Art Lead Products (1464013
Ontario Inc.) |
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563 Kenilworth Ave. N.,
Hamilton, Ontario,
Canada L8H 4T8
Toll-Free: 1-866-312-9084,
Phone: (905) 312-9084,
Fax: (905) 312-9085,
Email
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