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FERROUS METAL STEEL BALLS
DIMENSIONAL CONVERSION CHART
|
Inch Fractions |
Inch Decimals |
Metric mm |
Weight per 1000 balls kg |
Inch Fractions |
Inch Decimals |
Metric mm |
Weight per 1000 balls kg |
| 1/64 | .0156 | 0.397 | .00026 | – | .7480 | 19.000 | 27.98 |
| – | .0197 | 0.500 | .00051 | 3/4 | .7500 | 19.050 | 28.20 |
| 1/32 | .0312 | 0.794 | .00210 | 25/32 | .7812 | 19.844 | 31.87 |
| – | .0394 | 1.000 | .00407 | – | .7874 | 20.000 | 32.63 |
| 3/64 | .0469 | 1.190 | .00688 | 13/16 | .8125 | 20.637 | 35.85 |
| – | .0472 | 1.200 | .00704 | – | .8268 | 21.000 | 37.77 |
| – | .0590 | 1.500 | .01377 | 27/32 | .8437 | 21.431 | 40.15 |
| 1/16 | .0625 | 1.588 | .01632 | – | .8661 | 22.000 | 43.43 |
| 5/64 | .0781 | 1.984 | .03187 | 7/8 | .8750 | 22.225 | 44.78 |
| – | .0787 | 2.000 | .0326 | – | .9055 | 23.000 | 49.63 |
| 3/32 | .0937 | 2.381 | .0550 | 29/32 | .9062 | 23.019 | 49.75 |
| – | .0984 | 2.500 | .0638 | 15/16 | .9375 | 23.812 | 55.07 |
| 7/64 | .1094 | 2.778 | .0875 | – | .9449 | 24.000 | 56.39 |
| – | .1181 | 3.000 | .1101 | 31/32 | .9687 | 24.606 | 60.77 |
| 1/8 | .1250 | 3.175 | .1305 | – | .9842 | 25.000 | 63.73 |
| – | .1378 | 3.500 | .1749 | 1 | 1.0000 | 25.400 | 66.84 |
| 9/64 | .1406 | 3.572 | .1859 | – | 1.0236 | 26.000 | 71.69 |
| 5/32 | .1562 | 3.969 | .2550 | 1 1/16 | 1.0625 | 26.987 | 80.17 |
| – | .1575 | 4.000 | .2610 | – | 1.1024 | 28.000 | 89.54 |
| 11/64 | .1719 | 4.366 | .3394 | 1 1/8 | 1.1250 | 28.575 | 95.17 |
| – | .1772 | 4.500 | .3716 | – | 1.1811 | 30.000 | 110.10 |
| 3/16 | .1875 | 4.762 | .4406 | 1 3/16 | 1.1875 | 30.162 | 111.90 |
| – | .1968 | 5.000 | .5099 | 1 1/4 | 1.2500 | 31.750 | 130.50 |
| – | .2165 | 5.500 | .6786 | – | 1.2598 | 32.000 | 133.70 |
| 7/32 | .2187 | 5.556 | .6996 | 1 5/16 | 1.3125 | 33.337 | 151.10 |
| 15/64 | .2344 | 5.953 | .8605 | – | 1.3386 | 34.000 | 160.30 |
| – | .2362 | 6.000 | .8810 | 1 3/8 | 1.3750 | 34.925 | 173.80 |
| 1/4 | .2500 | 6.350 | 1.044 | – | 1.3780 | 35.000 | 174.90 |
| – | .2559 | 6.500 | 1.120 | – | 1.4173 | 36.000 | 190.30 |
| 17/64 | .2656 | 6.747 | 1.253 | 17/16 | 1.4375 | 36.512 | 198.50 |
| – | .2756 | 7.000 | 1.399 | – | 1.4960 | 38.000 | 223.80 |
| 9/32 | .2812 | 7.144 | 1.487 | 1 1/2 | 1.5000 | 38.100 | 225.60 |
| – | .2953 | 7.500 | 1.721 | 1 9/16 | 1.5625 | 39.687 | 255.00 |
| 19/64 | .2969 | 7.541 | 1.749 | – | 1.5748 | 40.000 | 261.00 |
| 5/16 | .3125 | 7.938 | 2.040 | 1 5/8 | 1.6250 | 41.275 | 286.00 |
| – | .3150 | 8.000 | 2.088 | 1 11/16 | 1.6875 | 42.862 | 321.20 |
| – | .3346 | 8.500 | 2.505 | 1 3/4 | 1.7500 | 44.450 | 358.20 |
| 11/32 | .3437 | 8.731 | 2.715 | – | 1.7716 | 45.000 | 371.70 |
| – | .3543 | 9.000 | 2.973 | 1 13/16 | 1.8125 | 46.037 | 398,00 |
| 23/64 | .3594 | 9.128 | 3.102 | 1 7/8 | 1.8750 | 47.625 | 440.60 |
| – | .3740 | 9.500 | 3.497 | 1 15/16 | 1.9375 | 49.212 | 486.10 |
| 3/8 | .3750 | 9.525 | 3.525 | – | 1.9685 | 50.000 | 509.90 |
| 25/64 | .3906 | 9.922 | 3.983 | 2 | 2.0000 | 50.800 | 534.70 |
| – | .3937 | 10.000 | 4.079 | 21/8 | 2.1250 | 53.975 | 641.40 |
| 13/32 | .4062 | 10.319 | 4.481 | – | 2.1653 | 55.000 | 678.60 |
| – | .4331 | 11.000 | 5.429 | 21/4 | 2.2500 | 57.150 | 761.30 |
| 7/16 | .4375 | 11.112 | 5.597 | – | 2.3622 | 60.000 | 881.00 |
| – | .4528 | 11.500 | 6.203 | 23/8 | 2.3750 | 60.325 | 895.40 |
| 29/64 | .4531 | 11.509 | 6.219 | 2y2 | 2.5000 | 63.500 | 1044.40 |
| 15/32 | .4687 | 11.906 | 6.884 | – | 2.5590 | 65.000 | 1120.10 |
| – | .4724 | 12.000 | 7.048 | 25/8 | 2.6250 | 66.675 | 1209.00 |
| 31/64 | .4844 | 12.303 | 7.596 | 23/4 | 2.7500 | 69.850 | 1390.10 |
| y2 | .5000 | 12.700 | 8.355 | – | 2.7559 | 70.000 | 1484.70 |
| – | .5118 | 13.000 | 8.961 | 27/8 | 2.8750 | 73.025 | 1588.40 |
| 17/32 | .5312 | 13.494 | 10.02 | – | 2.9528 | 75.000 | 1720.70 |
| – | .5512 | 14.000 | 11.19 | 3 | 3.0000 | 76.200 | 1804.70 |
| 9/16 | .5625 | 14.288 | 11.90 | 31/8 | 3.1250 | 79.375 | 2039.80 |
| – | .5905 | 15.000 | 13.77 | – | 3.1500 | 80.000 | 2088.30 |
| 19/32 | .5937 | 15.081 | 13.99 | 3 ¥a | 3.2500 | 82.550 | 2294.40 |
| 5/8 | .6250 | 15.875 | 16.32 | – | 3.3464 | 85.000 | 2530.90 |
| – | .6299 | 16.000 | 16.70 | 3y2 | 3.5000 | 88.900 | 2865.70 |
| 21/32 | .6562 | 16.669 | 18.89 | – | 3.5433 | 90.000 | 2993.40 |
| – | .6693 | 17.000 | 20.04 | – | 3.7401 | 95.000 | 3521.10 |
| 11/16 | .6875 | 17.462 | 21.72 | 33/4 | 3.7500 | 95.250 | 3524.70 |
| – | .7087 | 18.000 | 23.79 | – | 3.9370 | 100.000 | 4078.80 |
| 23/32 | .7187 | 18.256 | 24.82 | 4 | 4.0000 | 101.600 | 4277.70 |
PRECISION BALL: FERROUS METALS
LOW CARBON STEEL (CASE HARDENED)
General Information:
Balls of this type are generally used in applications where there are only moderate loads and slow rotating parts. For Example: Castors, Conveyors and Non-precision Bearings.
The main feature of this type of ball is the carburized case with a soft core giving resistance to surface wear.
International Equivalents:
AISI 1010, JIS SWRM12, EN32, ASTMA/29, Wks 1.0010
| Composition: | |
| C | 0.10-0.15% |
| Mn | 0.30-0.60% |
| P | 0.045% Max. |
| S | 0.045% Max. |
| Si | 0.1-0.4% Max. |
|
Hardness HRc |
60 Min. |
|
Mechanical Properties |
|
| Tensile Strength | 53.000psi |
| Yield Strength | 44.000psi |
| Density | 0.284lbs/cu.in |
| Size Range: |
1.588mm(1/16″)to 12.700mm(1/2″) |
|
Standard Grades Available |
100,200,500,1000 |
Minimum Case Depth:
| Ball Dia. | Case Depth | Ball Dia. | Case Depth |
| 1.5mm-2mm | 0.4mm | 9.5mm-11mm | 1.4mm |
| 2.1mm-3mm | 0.5mm | 11.1mm-12.5mm | 1.7mm |
| 3.1mm-4.5mm | 0.6mm | 12.6mm-14mm | 1.8mm |
| 4.6mm-5.5mm | 0.8mm | 14.1mm-19mm | 1.9mm |
| 5.6mm-6.5mm | 0.9mm | 19.1mm-38mm | 2.0mm |
| 6.6mm-9.5mm | 1.1mm |
HIGH CARBON STEEL (THROUGH HARDENED)
General Information:
Balls of this material have the advantages of being through hardened to HRc 60 min and will take higher loads and provide longer life than case hardened carbon balls for such applications as the Cycle Industry.
International Equivalents:
AISI 1065-86, EN8-9 C85, Wks 1.1269
| Composition:(AISI1085) | |
| C | 0.85% |
| Si | 0.35% |
| Mn | 0.60%. |
| P | 0.22%. |
| S | 0.022%. |
|
Hardness HRc |
60 Min. |
|
Mechanical Properties |
|
| Tensile Strength | 106.400psi |
| Density | 0.284lbs/cu.in |
| Size Range: |
3.175mm(1/8″) to 38.1mm(1.1/2??) |
|
Standard Grades Available |
100, 500,1000 |
Crushing Loads
| Ball Dia. | Load | Ball Dia. | Load |
| 1/8″ | 375kgs | 9/32″ | 2200kgs |
| 5/32″ | 800kgs | 5/16″ | 2700kgs |
| 3/16″ | 1100kgs | 11/32″ | 3200kgs |
| 1/4″ | 1800kgs | 3/8″ | 3900kgs |
HIGH CARBON CHROME ALLOY
General Information
This is an oil hardened steel which is universally used by the ball and roller bearing industry. The steel has high hardness and good resistance to deformation and excellent wear , resistance. Usually vacuum degassed and uniformly through hardened in atmospherically controlled electric furnaces.
International Equivalents:
AISI 52100, SUJ2ASTM 100CR6 , W 1.3505
| Composition: | |
| C | 0.95-1.1% |
| Cr | 1.30-1.60% |
| Mn | 0.25-0.45%. |
| Si | 0.15-0.30%. |
| P | 0.025% Max. |
| S | 0.025% Max |
|
Hardness HRc |
60-67 |
| Mechanical Properties | |
| Tensile Strength | 325.000psi |
| Yield Strength | 295.000psi |
| Density | 0.283lbs/cu.in |
| Size Range: | 0.635mm(0.025″) to 101.60mm(4??) |
| Standard Grades Available | 51025100500 |
Crushing Loads for Chrome Steel
| Diameter | Minimum Crushing Load | Diameter | Minimum Crushing Load | Diameter | Minimum Crushing Load | ||||
| Inch | mm | kg | Inch | mm | kg | Inch | mm | kg | |
| 1/8 | 3.175 | 666 | 31/64 | 12.303 | 7350 | 1 | 25.400 | 26600 | |
| – | 3.500 | 792 | 1/2 | 12.700 | 7780 | 11/6 | 26.987 | 29600 | |
| 5/32 | 3.968 | 990 | 17/32 | 13.494 | 8660 | 11/8 | 28.575 | 32800 | |
| – | 4.000 | 1000 | 9/16 | 14.288 | 9590 | 1 3/16 | 30.162 | 36100 | |
| – | 4.500 | 1240 | – | 15.000 | 10500 | 1 1/4 | 31.750 | 39500 | |
| 3/16 | 4.762 | 1370 | 19/32 | 15.081 | 10600 | 1 5/16 | 33.337 | 43100 | |
| – | 5.000 | 1490 | 5/8 | 15.875 | 11600 | 1 3/8 | 34.925 | 46800 | |
| 7/32 | 5.556 | 1800 | 21/32 | 16.668 | 12600 | 1 7/16 | 36.512 | 50600 | |
| 15/64 | 5.593 | 2020 | 11/16 | 17.462 | 13700 | 1 1/2 | 38.100 | 54600 | |
| – | 6.000 | 2060 | 23/32 | 18.256 | 14800 | 1 5/8 | 41.275 | 62900 | |
| 1/4 | 6.350 | 2080 | 3/4 | 19.050 | 16000 | 1 3/4 | 44.450 | 71700 | |
| 17/64 | 6.746 | 2535 | 25/32 | 19.843 | 17200 | 1 7/8 | 47.625 | 81100 | |
| 9/32 | 7.144 | 2810 | – | 20.000 | 17400 | 2 | 50.800 | 90900 | |
| 5/16 | 7.938 | 3380 | 13/16 | 20.637 | 18400 | 2 3/16 | 55.562 | 106500 | |
| 11/32 | 8.731 | 4000 | 27/32 | 21.431 | 19700 | 2 1/4 | 57.150 | 112000 | |
| 3/8 | 9.525 | 4670 | 7/8 | 22.225 | 21000 | 2 5/16 | 58.735 | 116500 | |
| – | 10.000 | 5090 | 29/32 | 23.018 | 22300 | 2 1/2 | 63.500 | 135000 | |
| 13/32 | 10.318 | 5380 | 15/16 | 23.812 | 23700 | 2 3/4 | 69.850 | 159800 | |
| 7/16 | 11.112 | 6140 | 31/32 | 24.606 | 25100 | 3 | 76.200 | 186500 | |
| 15/32 | 11.906 | 6940 | – | 25.000 | 25900 | 4 | 101.600 | 309500 | |
STAINLESS STEEL AISI 440C (MARTENSITIC)
General Information
These balls give maximum hardness with good corrosion resistance to fresh water, steam, crude oil, gasoline, alcohol, food environment, blood and perspiration. In addition this material is ferro-magnetic and makes a fair permanent magnet. Balls are deep freeze stabilised after heat treatment.
International Equivalents
AISI 440C, DINX105 CR Mol7, SUS 440C, W 1.4125
| Composition | |
| C | 0.95 – 1.20% |
| Cr | 16 -18% |
| Si | 1.00% Max |
| Mn | 1.0% Max |
| P | 0.040% Max |
| S | 0.030% Max |
| Mo | 0.40 – 0.80% Max |
| Hardness | |
| HRc | 58 – 63 |
|
Mechanical Properties |
|
| Tensile Strength | 285,000 psi |
| Yield Strength | 275,000 psi |
| Density | 0.277 Ibs/cu.in |
| Size Range: | 0.635mm (0.025″) to 101.60mm (4″) |
|
Standard Grades Available |
10, 25, 50,1000 |
STAINLESS STEEL AISI 302.304.304L (AUSTENITIC)
General Information
AISI 302 and 304 balls are for applications where material toughness and resistance to corrosion are more important than hardness. They have good corrosion resistance to the food environment, oxidising solutions and most organic chemicals. Applications are Valves, Aerosol and Finger Pumps. Corrosion resistance is higher after annealing and passivation. Not resistant to sulphuric acids.
International Equivalents
DIN X5 CR Ni 18.09, JIS SUS 304, W 1.4301
| Composition | 302 | 304 | 304L |
| C | 0.12% Max | 0.08% Max | 0.03% Max |
| Cr | 17 -19% | 18 – 20% | 18 – 20% |
| Ni | 8 -11% | 8 -10.5% | 8 -10.5% |
| Si | 1.0% Max | 1.0% Max | 1.0% Max |
| Mo | 1.0% Max | – | – |
| Mn | 2.0% Max | 2.0% Max | 2.0% Max |
| P | 0.045% Max | 0.045% Max | 0.045% Max |
| S | 0.03% Max | 0.03% Max | 0.03% Max |
STAINLESS STEEL AISI 420,420C (MARTENSITIC)
General Information
Balls of this material have a lower chrome content than 440C, and are used in applications where the more rigid corrosion resistance requirements can be relaxed. They have fair resistance to fresh water, steam, oil, gasoline, blood, perspiration, alcohol and food environment. However will not pass 40 hours salt spray test.
International Equivalents
AISI 420, SUS 420, X47Crl3, EN56D, W 1.3541
| Composition | 420 | 420C |
| C | 0.15% Min | 0.40 – 0.50% |
| Cr | 12 -14% | 12.5 -14.5% |
| Si | 1.0% Max | 1.0% Max |
| Mn | 1.0% Max | 1.0% Max |
| P | 0.04% Max | 0.04% Max |
| S | 0.03% Max | 0.03% Max |
| Ni | – | 1.0% Max |
STAINLESS STEEL AISI 316, 316L (AUSTENITIC)
General Information
Similar to AISI 302/304 but, with the addition of molybdenum improves corrosion resistance particularly to sulphuric acid compounds. These balls are used extensively in applications where contact is made with inks, photographic chemicals, bleaches, dyes and nitric acids.
This is the only austenitic steel for ball manufacture and can be Magnetic and Non Magnetic.
International Equivalents
DIN X5 CR Nl M0 17122, W 1.4401, JIS SUS 316
| Composition | 316 | 316L |
| C | 0.08% Max | 0.08% Max |
| Cr | 16 -18% | 16 -18% |
| Ni | 10 -14% | 10 -14% |
| Si | 1.0% Max | 1.0% Max |
| Mo | 2-3% | 2-3% |
| Mn | 2.0% Max | 2.0% Max |
| P | 0.045% Max | 0.045% Max |
| S | 0.03% Max | 0.03% Max |
APPLICATIONS
- Automotive
- Fluid Power
- Electronics
- Hydraulic Fittings
- Valves and Pumps
- Earthmoving & Construction Equipment
- Power Generation
- Instrumentation
- Filtration
- Hydraulic Cylinders
- Plumbing Products
- Petrochemicals
- Chemicals & Fertilizer Plants
- Pharmaceuticals
- Pneumatic Cylinders
- Dairy/Food Processing