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Goods and services provided by
K-mac Plastics (MI, USA).
Sold by 2CheckOut.com Inc. (Ohio, USA).
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S-2 Rockbit
Balls
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S-2
Tool Steel balls are designed to achieve extreme ruggedness. The
ball surface has a smooth ground and polished finish. These
balls provide the toughness and strength necessary for severe
shock loads. S-2 Tool Steel balls are hardened throughout
and have unusually good wear characteristics.
S-2
Tool Steel balls find most frequent use in oil field equipment
and offshore drilling operations. They provide good
service in withstanding the abrasion of pulverized rock and mud
slurries.
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S-2
Tool Steel (Rockbit) Balls: Available Grades and
Sizes
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Grade
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Size
Range in Inches and Millimeters
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50
- 200
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5/32
- 1 3/4
3.968 - 38.100
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Click
here for sizes and pricing |
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Balls
per Pound
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Size
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Balls
per Pound
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Inches
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Millimeters
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3/16
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4.762
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1,020
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7/32
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5.556
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645
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1/4
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6.350
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432
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9/32
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7.143
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303
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5/16
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7.937
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221
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11/32
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8.731
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166
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3/8
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9.525
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128
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13/32
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10.318
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101
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7/16
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11.112
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80.6
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15/32
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11.906
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65.5
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1/2
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12.700
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54.0
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17/32
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13.493
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445.0
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9/16
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14.287
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37.9
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5/8
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15.875
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27.6
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11/16
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17.462
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20.8
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3/4
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19.050
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16.0
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13/16
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20.637
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12.6
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7/8
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22.225
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10.1
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1
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25.400
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6.75
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1
1/8
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28.575
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4.74
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1
1/4
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31.750
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3.46
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1
1/2
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38.100
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2.00
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*
Upon special request only.
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Material
Analysis:
S-2
Tool Steel (Rockbit) balls are manufactured to the following
chemical analysis:
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Material
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AISI
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Federal
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Military
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ASTM
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UNS
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AMS
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Military
and
Gov't Stds.
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S-2
Tool Steel
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S-2
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QQ-T-570
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-
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A681
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T-4190
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-
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-
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Chemical
Analysis
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Carbon................................................................
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0.47%
to 0.55%
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Manganese.........................................................
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0.30%
to 0.50%
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Silicon..................................................................
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0.90%
to 1.10%
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Molybdenum........................................................
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0.30%
to 0.60%
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Phosphorus.........................................................
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0.030%
maximum
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Sulpher.................................................................
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0.030%
maximum
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Vanadium............................................................
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0.5%
maximum
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Mechanical
Properties
Hardness
as measured on parallel flat surfaces is Rockwell
C 55-58. Ball of special hardness are
available upon request.
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Tensile
strength...................................................
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310,000
psi
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Yield
strength.......................................................
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290,000
psi
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Elongation
in two inches....................................
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7%
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Reduction
in area................................................
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25%
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Modulus
of elasticity...........................................
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30,000,000
psi
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Density.................................................................
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0.283
lbs./cu. in
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�
copyright 2005 Hoover Precision Products, Inc., All Rights Reserved |
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Click
Here for Ball Terms and Definitions (Grades Available and Tolerances)
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Rockbit Balls |
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Balls per Pkg |
Stock # |
Grade # |
Diameter |
Price/Pkg |
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100 |
KB-1802 |
200 |
0.187 |
$7.60 |
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100 |
KB-1803 |
200 |
0.250 |
$14.12 |
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100 |
KB-1804 |
200 |
0.312 |
$21.72 |
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50 |
KB-1805 |
200 |
0.437 |
$24.00 |
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50 |
KB-1806 |
200 |
0.500 |
$29.20 |
| 50 |
KB-1807 |
200 |
0.562 |
$38.52 |
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20 |
KB-1818 |
200 |
0.687 |
$24.00 |
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20 |
KB-1809 |
200 |
0.750 |
$33.00 |
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20 |
KB-1800 |
200 |
0.812 |
$44.00 |
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10 |
KB-1811 |
200 |
0.875 |
$26.76 |
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10 |
KB-1835 |
200 |
0.937 |
$30.96 |
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10 |
KB-1814 |
200 |
1.00 |
$37.84 |
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