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S-2 Rockbit Balls

s2 Rock Bit Balls

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.

Rockbit Balls
Balls per Pkg Stock # Grade # Diameter  Price/Pkg
40000 KB-1219 200 0.187 $1497.60
100 KB-1802 200 0.187 $4.73
40000 KB-1218 48 0.187 $1560.00
4350 KB-1221 200 0.250 $280.84
100 KB-1803 200 0.250  $8.62
4350 KB-1220 48 0.250 $292.41
3000 KB-1213 200 0.281 $278.64
3000 KB-1192 48 0.281 $290.16
2200 KB-1182 200 0.312 $168.43
100 KB-1804 200 0.312  $13.34
2200 KB-1211 48 0.312  $228.93
1300 KB-1184 200 0.375  $148.04
1300 KB-1183 48 0.375  $154.15
1300 KB-1186 200 0.406  $185.48
1300 KB-1185 48 0.406  $193.13
810 KB-1188 200 0.437  $134.43
810 KB-1187 48 0.437  $139.97
50 KB-1805 200 0.437  $13.50
550 KB-1201 200 0.500  $107.65
50 KB-1806 200 0.500  $16.70
550 KB-1189 48 0.500  $165.08
380 KB-1181 200 0.562  $102.40
380 KB-1191 48 0.562  $106.62
275 KB-1194 200 0.625  $124.93
50 KB-1807 200 0.562  $21.13
275 KB-1193 48 0.625  $130.08
200 KB-1196 200 0.687  $167.25
25 KB-1818 200 0.687  $18.92
200 KB-1195 48 0.687  $174.14
160 KB-1199 200 0.750  $163.47
25 KB-1809 200 0.750  $21.94
200 KB-1197 24 0.750  $198.74
160 KB-1198 48 0.750  $167.78
125 KB-552 200 0.812  $168.11
25 KB-1800 200 0.812  $28.04
125 KB-1200 48 0.812  $175.04
100 KB-1174 200 0.875  $249.43
10 KB-1811 200 0.875  $14.56
100 KB-1173 48 0.875  $259.70
10 KB-1835 200 0.937  $16.86
80 KB-1176 200 0.938  $174.68
80 KB-1175 48 0.938  $181.82
80 KB-1178 200 0.969  $193.46
80 KB-1177 48 0.969  $201.49
65 KB-1170 200 1.000 $170.30
65 KB-1149 48 1.000 $178.10
10 KB-1814 200 1.00  $19.72
40 KB-1139 200 1.125 $233.60
40 KB-1168 48 1.125 $243.20
30 KB-1141 200 1.250 $212.40
30 KB-1140 48 1.250 $220.14
25 KB-1143 200 1.375 $296.50
25 KB-1142 48 1.375 $309.00
20 KB-1145 200 1.500 $265.20
20 KB-1144 48 1.500 $276.40

S-2 Tool Steel (Rockbit) Balls:  Available Grades and Sizes

Grade

Size Range in Inches and Millimeters

50 - 200

5/32 - 1 3/4                       3.968 - 38.100

Click here for sizes and pricing

Balls per Pound

Size

Balls per Pound

Inches

Millimeters

3/16

4.762

1,020

7/32

5.556

645

1/4

6.350

432

9/32

7.143

303

5/16

7.937

221

11/32

8.731

166

3/8

9.525

128

13/32

10.318

101

7/16

11.112

80.6

15/32

11.906

65.5

1/2

12.700

54.0

17/32

13.493

445.0

9/16

14.287

37.9

5/8

15.875

27.6

11/16

17.462

20.8

3/4

19.050

16.0

13/16

20.637

12.6

7/8

22.225

10.1

1

25.400

6.75

1 1/8

28.575

4.74

1 1/4

31.750

3.46

1 1/2

38.100

2.00

* Upon special request only.

Material Analysis:

S-2 Tool Steel (Rockbit) balls are manufactured to the following chemical analysis:

Material

AISI

Federal

Military

ASTM

UNS

AMS

Military and
Gov't Stds.

S-2 Tool Steel

S-2

QQ-T-570

-

A681

T-4190

-

-

Chemical Analysis

Carbon................................................................

0.47% to 0.55%

Manganese.........................................................

0.30% to 0.50%

Silicon..................................................................

0.90% to 1.10%

Molybdenum........................................................

0.30% to 0.60%

Phosphorus.........................................................

0.030% maximum

Sulpher.................................................................

0.030% maximum

Vanadium............................................................

0.5% maximum

Mechanical Properties
Hardness as measured on parallel flat surfaces is Rockwell “C” 55-58.  Ball of special hardness are available upon request.

Tensile strength...................................................

310,000 psi

Yield strength.......................................................

290,000 psi

Elongation in two inches....................................

7%

Reduction in area................................................

25%

Modulus of elasticity...........................................

30,000,000 psi

Density.................................................................

0.283 lbs./cu. in

© copyright 2005 Hoover Precision Products, Inc., All Rights Reserved

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