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GRINDING MEDIA · EXPERTISE SINCE 1980

Grinding media.
Matched to
your method.

Choose balls and beads around your mill, material and finished specification. We’ll help review composition, diameter, quantity and compatibility before you order.

Illustrative range of steel, ceramic and glass grinding media beside a milling jar

MATERIALS & SIZES

Find your material.
Choose your size.

From fine beads to larger milling balls, explore glass, ceramics, steel, carbide, plastics and specialty media. Start with a known specification or let us help you choose.

Catalog reference sizes. Current availability is confirmed with your quotation.

Material family

19 material groups. Select a family or search to narrow the list.

Glass

Lead-free soda-lime glass

0.25 to 25.4 mm

Bead size bands and larger ball diameters listed below. Ask about smaller sizes.

View catalog sizes

Select a size to add it to your quotation request. Ranges describe bead size bands.

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Glass

Borosilicate glass

2 to 18 mm

Composition and diameter reviewed against the liquid system and application.

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Glass

Low-alkali & black glass

Size on request

Additional glass compositions. Ask for the size range for the specific glass required.

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Glass

Colored & precision glass

Composition-dependent

Also offered for engineering uses. Colored glass: 0.04 to 50.8 mm and larger. Precision soda-lime: 0.8 to 50.8 mm; precision borosilicate: 2.5 to 50.8 mm. Confirm grade and suitability for grinding.

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Ceramics

Alumina

0.4 mm to 2-1/2 in

Published compositions: 60%, 87%, 90%, 92%, 94%, 99.5% and 99.8% alumina. Size and shape depend on composition.

View catalog sizes

Select a size to add it to your quotation request. Ranges describe bead size bands.

Other forms: Also available as rods, cylinders and satellites. Specify shape and dimensions.

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Ceramics

Sintered zirconium silicate

0.2 to 2.6 mm

Composition and stabilizer options are reviewed with your specification.

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Ceramics

High-density zirconium oxide

0.4 to 3.35 mm beads

MgO-stabilized media. Selected catalog bead bands below; other sizes require confirmation.

View catalog sizes

Select a size to add it to your quotation request. Ranges describe bead size bands.

Other forms: Cylinders and satellites up to 1-1/4 in. Confirm form and dimensions separately from bead diameter.

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Ceramics

Rare-earth-stabilized zirconium oxide

0.4 mm to 2 in

Ceria-stabilized zirconia. Specify the composition, diameter and application.

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Steel

Chrome steel

0.8 mm to 6 in family range

AISI 52100. Confirm the required alloy and diameter; the family range does not apply to every alloy.

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Steel

Stainless steel

0.8 mm to 6 in family range

AISI 302/304, 316 and 440C. Size availability is grade-specific.

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Steel

Carbon steel

0.8 mm to 6 in family range

Low-carbon AISI 1010/1022 and high-carbon AISI 1065. Confirm alloy, hardness and diameter.

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Steel

Steel shot

0.075 to 3 mm catalog range

Carbon steel and cast 300-series stainless. Sifted shot is not precision spherical media. Request the detailed size chart; the website lists a 0.09 mm lower limit.

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Carbide

Tungsten carbide

Approx. 0.5 to 2 mm beads

Larger shapes: 3/16 to 3/4 in. Confirm binder, shape and exact dimensions.

Other forms: Balls, pellets and satellites. Pellet and satellite dimensions are not interchangeable with ball diameter.

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Plastics

Plastic media

0.15 mm to fractional-inch sizes

Polystyrene, polyamide, polycarbonate and acrylic. Ask for the diameter and form available in each polymer.

Other forms: Balls and cubes; confirm shape with the quotation.

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Plastics

PTFE & PTFE-coated steel

Size on request

PTFE media and PTFE-coated steel balls and rods. Specify core, coating and finished dimensions.

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Specialty

Specialty ceramics & natural media

Size on request

Zirconia-toughened alumina (ZTA), silicon carbide, silicon nitride, Syalon, Porox, agate, flint pebbles and Ottawa sand. Ask for composition, shape and offered size.

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START WITH THE PROCESS

What does your grinding process need?

Start with the process or replacement requirement. We’ll help identify the details needed to review media options.

Illustration of a grinding jar with steel balls and dry mineral material

Dry grinding

Share the feed material, starting size, desired fineness and sample quantity. Media and jar compatibility are part of the selection.

Discuss this requirement
Illustration of ceramic beads in a milling vessel with a liquid dispersion

Wet grinding & dispersion

Describe the liquid system, material, target result and equipment. Include chemical compatibility and contamination requirements.

Discuss this requirement
Illustration of replacement steel and ceramic media kept in separate dishes

Replacement & replenishment

Know the mill or existing media? Send the model, jar material, media specification and quantity so the requirement can be reviewed.

Discuss this requirement

Generated application illustrations show typical contexts, not supplied configurations or verified results.

The mill. The sample.
The finished specification.

A media material alone is not a complete grinding method. Review the equipment, size and operating conditions together.

Discuss your requirements
Mill & grinding container
Equipment model, jar material and volume, plus existing media information if available.
Feed & target result
Starting particle size, desired fineness, sample amount and wet or dry operation.
Media & product requirements
Composition, diameter, wear contribution, contamination limits and chemical compatibility.
Quantity & operating method
Required quantity, planned process conditions and the equipment manufacturer’s guidance.

Bring the application.
We’ll help with the media.

Use an existing media specification or start with your processing goal. Our team can help work through what needs to be confirmed.

Tell us what you need
Composition & size
Required material, diameter, size distribution or existing media reference.
Equipment & conditions
Mill model, jar, operating mode and any manufacturer restrictions.
Wear & documentation
Product purity, material transfer, requested certificates and traceability.
Quantity & supply
Trial quantity, replacement amount, packaging and future replenishment.

Before you order.

Start with what you know. We’ll help work through the remaining details.

I don’t know which material to choose. Can you help?

Start with the mill, sample and result you need. Add chemical compatibility or contamination concerns so the team can help narrow the options.

Can media be moved between different mills?

Confirm compatibility with the particular equipment and grinding container before use. The material, size, quantity and operating conditions need to be reviewed together.

Does nonmetallic mean contamination-free?

No. Review the actual media composition and possible wear contribution against the requirements of your sample and process.

Can I start with a trial quantity?

Tell us the material, size and amount you need. Trial quantities and availability are confirmed with the quotation.

Tell us what you need.

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Send your enquiry directly to the Glen Mills team.