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Grinding Balls for Planetary Mills

40mm Grinding Ball, Sintered Corundum

40mm Grinding Ball, Sintered Corundum

Model: FTA-360
$219.0000
Price: $219.00
40mm Grinding Ball, Zirconium Oxide

40mm Grinding Ball, Zirconium Oxide

Model: FTA-361
$764.0000
Price: $764.00
40mm Grinding Ball, Hardened Stainless Steel

40mm Grinding Ball, Hardened Stainless Steel

Model: FTA-362
$59.0000
Price: $59.00
30mm Grinding Ball, Agate

30mm Grinding Ball, Agate

Model: FTA-365
$169.0000
Price: $169.00
30mm Grinding Ball, Sintered Corundum

30mm Grinding Ball, Sintered Corundum

Model: FTA-366
$135.5000
Price: $135.50
30mm Grinding Ball, Zirconium Oxide

30mm Grinding Ball, Zirconium Oxide

Model: FTA-367
$372.0000
Price: $372.00
30mm Grinding Ball, Hardened Stainless Steel

30mm Grinding Ball, Hardened Stainless Steel

Model: FTA-368
$27.5000
Price: $27.50
30mm Grinding Ball, Hardmetal Tungsten Carbide

30mm Grinding Ball, Hardmetal Tungsten Carbide

Model: FTA-369
$813.5000
Price: $813.50
20mm Grinding Ball, Agate

20mm Grinding Ball, Agate

Model: FTA-370
$72.5000
Price: $72.50
20mm Grinding Ball, Sintered Corundum

20mm Grinding Ball, Sintered Corundum

Model: FTA-371
$83.5000
Price: $83.50
20mm Grinding Ball, Zirconium Oxide

20mm Grinding Ball, Zirconium Oxide

Model: FTA-372
$207.5000
Price: $207.50
20mm Grinding Ball, Hardened Stainless Steel

20mm Grinding Ball, Hardened Stainless Steel

Model: FTA-373
$11.5000
Price: $11.50
20mm Grinding Ball, Hardmetal Tungsten Carbide

20mm Grinding Ball, Hardmetal Tungsten Carbide

Model: FTA-374
$300.0000
Price: $300.00
15mm Grinding Ball, Agate

15mm Grinding Ball, Agate

Model: FTA-375
$50.0000
Price: $50.00
15mm Grinding Ball, Sintered Corundum

15mm Grinding Ball, Sintered Corundum

Model: FTA-376
$81.5000
Price: $81.50
15mm Grinding Ball, Zirconium Oxide

15mm Grinding Ball, Zirconium Oxide

Model: FTA-377
$178.0000
Price: $178.00
15mm Grinding Ball, Hardened Stainless Steel

15mm Grinding Ball, Hardened Stainless Steel

Model: FTA-378
$9.0000
Price: $9.00
15mm Grinding Ball, Hardmetal Tungsten Carbide

15mm Grinding Ball, Hardmetal Tungsten Carbide

Model: FTA-379
$214.5000
Price: $214.50
10mm Grinding Ball, Agate

10mm Grinding Ball, Agate

Model: FTA-380
$21.5000
Price: $21.50
10mm Grinding Ball, Sintered Corundum

10mm Grinding Ball, Sintered Corundum

Model: FTA-381
$43.0000
Price: $43.00
10mm Grinding Ball, Zirconium Oxide

10mm Grinding Ball, Zirconium Oxide

Model: FTA-382
$79.0000
Price: $79.00
10mm Grinding Ball, Hardened Stainless Steel

10mm Grinding Ball, Hardened Stainless Steel

Model: FTA-383
$5.0000
Price: $5.00
10mm Grinding Ball, Hardmetal Tungsten Carbide

10mm Grinding Ball, Hardmetal Tungsten Carbide

Model: FTA-384
$77.0000
Price: $77.00
5mm Grinding Ball, Agate

5mm Grinding Ball, Agate

Model: FTA-385
$12.5000
Price: $12.50
5mm Grinding Ball, Zirconium Oxide

5mm Grinding Ball, Zirconium Oxide

Model: FTA-386
$4.0000
Price: $4.00
5mm Grinding Ball, Hardened Stainless Steel

5mm Grinding Ball, Hardened Stainless Steel

Model: FTA-387
$3.0000
Price: $3.00
5mm Grinding Ball, Hardmetal Tungsten Carbide

5mm Grinding Ball, Hardmetal Tungsten Carbide

Model: FTA-388
$17.0000
Price: $17.00
3mm Grinding Ball, Zirconium Oxide (100 pieces)

3mm Grinding Ball, Zirconium Oxide (100 pieces)

Model: FTA-390
$336.0000
Price: $336.00
3mm Grinding Ball, Hardened Stainless Steel (100 pieces)

3mm Grinding Ball, Hardened Stainless Steel (100 pieces)

Model: FTA-391
$198.5000
Price: $198.50
3mm Grinding Ball, Hardmetal Tungsten Carbide (100 pieces)

3mm Grinding Ball, Hardmetal Tungsten Carbide (100 pieces)

Model: FTA-392
$1232.5000
Price: $1,232.50
2mm Grinding Ball, Zirconium Oxide (100 pieces)

2mm Grinding Ball, Zirconium Oxide (100 pieces)

Model: FTA-393
$336.0000
Price: $336.00
1.6mm Grinding Ball, Hardmetal Tungsten Carbide (100 pieces)

1.6mm Grinding Ball, Hardmetal Tungsten Carbide (100 pieces)

Model: FTA-394
$1232.5000
Price: $1,232.50
1mm Grinding Ball, Zirconium Oxide (100 pieces)

1mm Grinding Ball, Zirconium Oxide (100 pieces)

Model: FTA-395
$336.0000
Price: $336.00
1mm Grinding Ball, Hardened Stainless Steel (100 pieces)

1mm Grinding Ball, Hardened Stainless Steel (100 pieces)

Model: FTA-396
$716.5000
Price: $716.50
0.6mm Grinding Ball, Hardmetal Tungsten Carbide (100 pieces)

0.6mm Grinding Ball, Hardmetal Tungsten Carbide (100 pieces)

Model: FTA-397
$1232.5000
Price: $1,232.50

Grinding Balls are used with Fritsch Planetary Mills and are placed into grinding bowls along with the sample to be ground. The final size of the sample after milling in a planetary mill is determined by the size and quantity of the grinding balls used. As a general guideline, larger balls will result in a coarser product and smaller balls will result in a finer product. It is not recommended to add balls of different sizes into the jar with the sample.

The selection of ball size and quantity for specific applications is best determined through user trials. In general, using more balls will reduce grinding times and yield finer size distributions until an optimum loading point is reached. However, it’s advisable not to exceed filling the bowl with balls and samples beyond two-thirds of its total volume. One-third of the bowl volume should be left for effective grinding action.

It is recommended to use grinding bowls and balls made of a material harder than the sample to be processed. For exceptionally hard samples, employing tungsten carbide balls in steel bowls or zirconium oxide balls in corundum bowls can enhance grinding efficiency. It’s important to note that when using dissimilar materials, there may be a risk of cross-contamination.

Balls with a 3mm diameter and smaller include 100 pieces. Classic Grinding Bowls or Premium Grinding Bowls are purchased separately.

Grinding Balls
MaterialModel No.Size, mm dia.Bowl Size Compatibility, mL
Agate (SiO2)
  • 2.65g/cm³ density
  • Recommended for soft to medium-hard samples
FTA-365 30 500, 250
FTA-370 20 500, 250, 80
FTA-375 15 500, 250, 80
FTA-380 10 500, 250, 80
FTA-385 5 500, 250, 80
Sintered Corundum (99.7% AI2O3)
  • 3.8g/cm³ density
  • Recommended for medium-hard, fibrous samples
FTA-360 40 500
FTA-366 30 500, 250, 80
FTA-371 20 500, 250, 80
FTA-376 15 500, 250, 80
FTA-381 10 500, 250, 80
Zirconium Oxide (ZrO2)
  • 5.7g/cm³ density
  • Recommended for fibrous, abrasive samples
FTA-361 40 500
FTA-367 30 500, 250
FTA-372 20 500, 250, 80
FTA-377 15 500, 250, 80
FTA-382 10 500, 250, 80
FTA-386 5 500, 250, 80
FTA-390 3 500, 250, 80
FTA-393 2 500, 250, 80
FTA-395 1 500, 250, 80
Hardened Stainless Steel (Fe-Cr)
  • 7.7g/cm³ density
  • Recommended for hard or medium-hard, brittle samples
FTA-362 40 500
FTA-368 30 500, 250
FTA-373 20 500, 250, 80
FTA-378 15 500, 250, 80
FTA-383 10 500, 250, 80
FTA-387 5 500, 250, 80
FTA-391 3 500, 250, 80
FTA-396 1 500, 250, 80
Hardmetal Tungsten Carbide (WC)
  • 14.3g/cm³ density
  • Recommended for hard, abrasive samples
FTA-369 30 500, 250
FTA-374 20 500, 250, 80
FTA-379 15 500, 250, 80
FTA-384 10 500, 250, 80
FTA-388 5 500, 250, 80
FTA-392 3 500, 250, 80
FTA-394 1.6 500, 250, 80
FTA-397 0.6 500, 250, 80
Material

FTA-365, FTA-370, FTA-375, FTA-380, FTA-385: Agate

FTA-360, FTA-366, FTA-371, FTA-376, FTA-381: Sintered Corundum

FTA-361, FTA-367, FTA-372, FTA-377, FTA-382, FTA-386, FTA-390, FTA-393, FTA-395: Zirconium Oxide

FTA-362, FTA-368, FTA-373, FTA-378, FTA-383, FTA-387, FTA-391, FTA-396: Hardened Stainless Steel

 
Size

FTA-360, FTA-361, FTA-362: 40mm dia.

FTA-365, FTA-366, FTA-367, FTA-368, FTA-369: 30mm dia. 

FTA-370, FTA-371, FTA-372, FTA-373, FTA-374: 20mm dia. 

FTA-375, FTA-376, FTA-377, FTA-378, FTA-379: 15mm dia. 

FTA-380, FTA-381, FTA-382, FTA-383, FTA-384: 10mm dia. 

FTA-385, FTA-386, FTA-387, FTA-388: 5mm dia. 

FTA-390, FTA-391, FTA-392: 3mm dia. 

FTA-393: 2mm dia. 

FTA-394: 1.6mm dia. 

FTA-395, FTA-396: 1mm dia. 

FTA-397: 0.6mm dia.

 
Estimated Shipping Weight

FTA-365: 0.08lb (0.04kg) 

FTA-366: 0.13lb (0.06kg)

FTA-367, FTA-398: 0.22lb (0.1kg) 

FTA-369: 0.44lb (0.2) 

FTA-370: 0.024lb (0.011) 

FTA-371, FTA-372: 0.044lb (0.02) 

FTA-373, FTA-379: 0.066lb (0.03) 

FTA-374: 0.15lb (0.07) 

FTA-375, FTA-376, FTA-381, FTA-384: 0.022lb (0.01) 

FTA-377: 0.024lb (0.011) 

FTA-378: 0.031lb (0.014) 

FTA-380: 0.0044lb (0.002) 

FTA-382: 0.007lb (0.003) 

FTA-383: 0.009lb (0.004) 

FTA-385: 0.00022lb (0.0001) 

FTA-386: 0.0009lb (0.0004) 

FTA-387: 0.0011lb (0.0005) 

FTA-388: 0.0022lb (0.001) 

FTA-390, FTA-391, FTA-392, FTA-394, FTA-395, FTA-396, FTA-397: 0.22lb (0.1)

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Material

FTA-365, FTA-370, FTA-375, FTA-380, FTA-385: Agate

FTA-360, FTA-366, FTA-371, FTA-376, FTA-381: Sintered Corundum

FTA-361, FTA-367, FTA-372, FTA-377, FTA-382, FTA-386, FTA-390, FTA-393, FTA-395: Zirconium Oxide

FTA-362, FTA-368, FTA-373, FTA-378, FTA-383, FTA-387, FTA-391, FTA-396: Hardened Stainless Steel

 
Size

FTA-360, FTA-361, FTA-362: 40mm dia.

FTA-365, FTA-366, FTA-367, FTA-368, FTA-369: 30mm dia. 

FTA-370, FTA-371, FTA-372, FTA-373, FTA-374: 20mm dia. 

FTA-375, FTA-376, FTA-377, FTA-378, FTA-379: 15mm dia. 

FTA-380, FTA-381, FTA-382, FTA-383, FTA-384: 10mm dia. 

FTA-385, FTA-386, FTA-387, FTA-388: 5mm dia. 

FTA-390, FTA-391, FTA-392: 3mm dia. 

FTA-393: 2mm dia. 

FTA-394: 1.6mm dia. 

FTA-395, FTA-396: 1mm dia. 

FTA-397: 0.6mm dia.

 
Estimated Shipping Weight

FTA-365: 0.08lb (0.04kg) 

FTA-366: 0.13lb (0.06kg)

FTA-367, FTA-398: 0.22lb (0.1kg) 

FTA-369: 0.44lb (0.2) 

FTA-370: 0.024lb (0.011) 

FTA-371, FTA-372: 0.044lb (0.02) 

FTA-373, FTA-379: 0.066lb (0.03) 

FTA-374: 0.15lb (0.07) 

FTA-375, FTA-376, FTA-381, FTA-384: 0.022lb (0.01) 

FTA-377: 0.024lb (0.011) 

FTA-378: 0.031lb (0.014) 

FTA-380: 0.0044lb (0.002) 

FTA-382: 0.007lb (0.003) 

FTA-383: 0.009lb (0.004) 

FTA-385: 0.00022lb (0.0001) 

FTA-386: 0.0009lb (0.0004) 

FTA-387: 0.0011lb (0.0005) 

FTA-388: 0.0022lb (0.001) 

FTA-390, FTA-391, FTA-392, FTA-394, FTA-395, FTA-396, FTA-397: 0.22lb (0.1)