Ceramic Ball

Ceramic Balls

Ceramic balls are spherical, rolling elements that provide higher stiffness, lower thermal expansion, lighter weight, increased corrosion resistance, and higher electrical resistance than steel balls. They are made from a variety of ceramic materials.

LILY Bearing provide a wide range of ceramic ball options across a variety of sizes. Material options includeSilicon nitride (Si3N4), Zirconia (ZRO2), Alumina(Al2O3) and Silicon carbide (SIC) from 0.4mm to just over 115mm in diameter with the most common sizes in between. Precision grades provided are 5, 10, 16, 25 and 100.

Balls dimension Regularvalue

(mm)

Balls Qty/Kg
mm inch SSiC Si3N4 ZrO2 Al2O3
0.5  0.5000
0.7 0.7000
1/32 0.7938
0.8 0.8000
1 1.0000
1.2 1.2000 349761 345389 183291 283396
1.3  1.3000
1.5 1.5000 179077 176839 93845 145099
1/16 1.5785 151068 149180 79167 122404
5/64 1.9844
2 2.0000 75548 74604 39519 61213
3/32 2.3812 44764 44204 23458 36270
2.5 2.5000 38681 38197 20270 31341
7/64 2.7781
3 3.0000 22385 22105 11731 18137
1/8 3.1750 18884 18647 9896 15301
3.5 3.5000 14096 13920 7387 11422
5/32 3.9688 9668 9547 5066 7834
4 4.0000 9444 9325 4949 7652
4.5 4.5000 6632 6550 3476 5374
3/16 4.7625 5595 5525 2932 4533
5 5.0000 4835 4775 2534 3918
5.5 5.5000 3633 3587 1904 2943
7/32 5.5562 3524 3480 1847 2855
15/64 5.9531 2865 2829 1501 2321
6 6.0000 2798 2763 1466 2267
1/4 6.3500 2360 2331 1237 1913
6.5 6.5000 2201 2173 1153 1783
17/64 6.7469 1968 1943 1031 1594
7 7.0000 1762 1740 923 1428
9/32 7.1438 1658 1637 869 1343
7.5 7.5000 1433 1415 751 1161
5/16 7.9375 1209 1193 633 979
7.98  7.9800
8 8.0000 1180 1166 619 956
8.5 8.5000 984 972 516 797
11/32 8.7312 908 897 476 736
9 9.0000 829 819 434 672
9.5 9.5000 705 696 369 571
3/8 9.5250 699 691 367 567
10 10.000 604 597 317 490
13/31 10.319 550 543 288 446
11 11.000 454 448 238 368
13/32  10.3188
7/16 11.113 440 435 231 357
11.5 11.500 397 392 208 322
29/64 11.509 396 392 208 321
15/32 11.906 358 354 188 290
12 12.000 350 345 183 283
31/64 12.303 325 320 170 263
1/2 12.700 295 291 155 239
13 13.000 275 272 144 223
17/32 13.494 246 243 129 199
14 14.000 220 218 115 178
9/16 14.288 207 205 109 168
15 15.000 179 177 94 145
19/32 15.0812 176 174 92 143
5/8 15.8750 151 149 79 122
16 16.0000 148 146 77 120
21/32 16.6688 130 129 68 106
17 17.0000 123 121 64 100
11/16 17.4625 113 112 59 92
18 18.0000 104 102 54 84
23/32 18.2562 99 98 52 80
19 19.0000 88 87 46 71
3/4 19.0500 87 86 46 71
25/32 19.8438 77 76 41 63
20 20.0000 76 75 40 61
13/16 20.6375 69 68 36 56
21 21.0000 65 64 34 53
22 22.0000 57 56 30 46
7/8 22.2250 55 54 29 45
23 23.0000 50 49 26 40
29/32 23.0188 50 49 26 40
15/16 23.8125 45 44 23 36
24 24.0000 44 43 23 35
25 25.0000 39 38 20 31
1 25.4000 37 36 19 30
26 26.0000 34 34 18 28
1 1/16 26.9875 31 30 16 25
28 28.0000 28 27 14 22
1 1/8 28.5750 26 26 14 21
30 30.0000 22 22 12 18
19/16  30.1625
5/4 31.7500
1 3/8 34.9250
35 35.0000
1 1/2 38.1000
1 5/8  41.2750
1 11/16  42.8625
1 7/8  47.6250
2 50.8000

Ceramic balls have excellent resistance to wear and seizure, they offer solutions for high temperature environments (Up to 800C for Si3N4) high rigidity, light weight and are non magnetic with insulating properties.

Applications include high speed spindle bearings, solenoid valves, down hole pumps, vacuum equipment, gas monitoring devices and turbo chargers.

How Ceramic Balls are Made

Ceramic balls are manufactured by pressing a ceramic powder binder mixture in a preform shape. After the ball is sintered, the part lines are removed via finish-grinding. Lapping and precision finishing is then used to design or grade dimensions and product specifications such as diameter, sphericity, and surface finish.  For applications that require a fully-dense material with specific material properties, hot isostatic pressing (HIP) may be used after sintering. HIP produces ceramic balls with a pore-free microstructure and micron-sized grains.

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