-Hardened Carbon Steel Balls-
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Hardened Carbon
When you're
looking for a cost efficient ball selection look to our Hardened
Carbon Steel Balls. Many sizes available for immediate
shipment, or have our engineering service develop the precision ball
to fit your exact specifications.
Manufacturing and quality are handled at our plant in Sterling, IL, USA. Balls are carburized and hardened, with a highly polished surface finish. They feature a minimum hardness of 60 Rc with ball sphericity to .0001" and will fit a wide range of applications.
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FEATURES |
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Manufactured to stringent ABMA Spec. 10 standards
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Full range of ball sizes (1/8" to 1")
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High quality carbon steel material
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Available grades (100, 200, 500, 1000, 2000)
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Full traceability of material
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Case hardened carbon steel
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CHEMICAL ANALYSIS (Raw Material) |
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| Carbon (core) | 0.10 to 0.20% |
| Manganese | 0.60 to 0.90% |
| Silicon | 0.10 to 0.20 |
| Sulphur | 0.50% maximum |
| Phosphorus |
0.040% maximum |
Case Depth Requirements
| Ball Diameter | Minimum Case Depth | Ball Diameter | Minimum Case Depth | ||
| at least | but not | at least | but not | ||
| 1/8" | 3/16" | .025" | 3/8" | 7/16" | .055" |
| 3/16" | 7/32" | .030" | 7/16" | 1/2" | .065" |
| 7/32" | 1/4" | .035" | 1/2" | 9/16" | .070" |
| 1/4" | 3/8" | .045" | 9/16" | 3/4" | .075" |
| 3/4" | 1˝" | .080" | |||
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TYPICAL USES |
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HARDNESS PROPERTIES |
| Hardness
for carbon steel balls, as measured on the ball's surface is
Rockwell "C" 60 (minimum) or specified by customers.
See chart for minimum case depth. |
| Ball Weight table |
| Ball Diameter | No. of Balls per lb. | No. of Balls per kg. | |
| Decimal | Fraction | ||
| .1250 | 1/8" | 3440 | 7584 |
| .1875 | 3/16" | 1020 | 2249 |
| .2500 | 1/4" | 430 | 948 |
| .3125 | 5/16" | 220 | 485 |
| .3750 | 3/8" | 128 | 282 |
| .4375 | 7/16" | 80.3 | 177 |
| .5000 | 1/2" | 53.8 | 119 |
| .5625 | 9/16" | 37.8 | 83 |
| .6250 | 5/8" | 27.5 | 61 |
| .6875 | 11/16" | 20.7 | 46 |
| .7500 | 3/4" | 15.9 | 35 |
| .8125 | 13/16" | 12.5 | 28 |
| .8750 | 7/8" | 10.0 | 22 |
| .9375 | 15/16" | 8.16 | 18 |
| 1.0000 | 1" | 6.72 | 14 |
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Tolerances by Grade for Lots of Balls and Individual Balls |
| Ball Grade | Allowable
Lot Diameter Variation |
Allowable Ball Diameter Variation | Allowable
Deviation from Spherical Form |
Maximum
Surface Roughness Arithmetic Avg. |
| 100 | .0002" | .0001" | .0001" | 5 |
| 200 | .0004" | .0002" | .0002" | 8 |
| 500 | .001" | .0005" | .0005" | N/A |
| 1000 | .002" | .001" | .001" | N/A |
| 2000 | .004" | .002" | .002" | N/A |