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Grinding Glass Beads

Grinding Glass Beads. With the advantages of smooth surface, even size, high hardness, wearable and stable, grinding glass beads are widely used as disperser, grinding media and filler materials in paint, ink and chemical industry.


Daohong® glass beads have been and continue to be used as grinding or dispersing beads, either as a cost-effective alternative to more expensive ceramic beads or for performance reasons in older, less powerful mills. Daohong® glass beads are also used for grinding sensitive grinding materials for which ceramic beads cannot or may not be used for various reasons.

Due to the synergies between ceramic and glass grinding beads, we are specialists in the field of wet grinding. Our extensive know-how in wet grinding technology enables us to optimize our glass beads for the use as grinding beads. Moreover, we use agitator bead mill grinding beads in our production and in our technical centre and thus can provide our customers with practical advice and optimise their production processes with suitable measures.

Please Contact Us For Pallet Pricing Here.

  • Our Minimum Order For Medium Glass Beads is 2 bags per order.  These beads come in 44 lb containers.
  • Packaging:  44 lb bags on a pallet, 50/pallet = one metric ton (2,200 lbs) per pallet is standard packaging.
  • Glass Bead Applications:
    • Wet Bead Milling
    • Wet Grinding
    • Dispersion of paints, coatings, chemicals
    • Decorative:  Used in wall finishes, plasters, and paints for texture and shimmer
    • Water Filtration: The beads are being used in place of gravel because of their endurance, roundness, and higher crush strength. 
    • Grinding paints, pigments and chemicals, minerals, pharmaceuticals, Agro Chemicals, Inks, Dyes, Coatings
    • Mechanical and Galvanized Plating
    • Filler for use in electronics to protect against explosion
    • polishing element for optics
    • spacer beads
  • Pricing Quotes:  Email us with your destination zip code, quantity, and size of glass bead.  We will work up a freight rate for you.​
Sizes Available:   
STOCK # SIZE (mm) NET WT Approx. Mesh Size
3 0.25-0.5 44 LB 50-60
5 0.4-0.6 44 LB 30-40
7   0.6-0.8 44 LB 20-30
9 0.75-1.0 44 LB 18-20
11 1.00-1.25 44 LB 16-18
14 1.25-1.65 44 LB 13-16
17 1.55-1.85 44 LB 11-13
19 1.7-2.1 44 LB 10-12
22 2.0-2.4 44 LB 08-10
25 2.40 - 2.90 44 LB 7.5-08
30 2.85-3.45 44 LB 06-07
35 3.4-4.0 44 LB 5.5 - 06
40 3.8-4.4 44 LB 05 - 5.5

Chemical Analysis:

Glass beads made of soda lime glass; CAS-Nr. 65997-17-3 / EINECS 266-046-0
Name Method Weight
    reference value in Weight-% tolerance value in Weight-%    
Silicon dioxide SiO2 DIN 51001 72,50% +/- 0,90 7631-86-9 231-545-4
Sodium oxide Na2O DIN 51001 13,00% +/- 0,80 1313-59-3 215-208-9
Calcium oxide CaO DIN 51001 9,06% +/- 0,28 1305-78-8 215-138-9
Magnesium oxide MgO DIN 51001 4,22% +/- 0,10 1309-48-4 215-171-9
Aluminium oxide Al2O3 DIN 51001 0,58% +/- 0,18 1344-28-1 215-691-6

General Specifications and Technical Data:

Roundness Article 52xx in size 0,1 - 0,8 mm: ≥ 0.89 (ratio width/length (xmin/xmax) Article 45xx in size 1,0 - 3,0 mm: ≥ 0.95 (ratio width/length (xmin/xmax)
Compressive strength up to 2.100 N (belonging to diameter)
Refractive index 1.5188
Air bubbles inside bead (> 0,3mm) ≤ 2,5 % Visual test: internal control of 200 Glass beads by Microscope
Size (Diameter) Microglass beads in size between 0 and 800 µm 
Glass beads Type S in size between 0,25 – 4,40 mm (see table Standard Sizes)
Transformation temperature 549 °C
Softening point (Littleton point) 734 °C
Melting point 1.446 °C
Specific thermal Conductivity 1,129 W/km
Coefficient of expansion 9,05 106 (1/K) [20-400 °C]
Specific thermal capatcity 1,329 kJ/kg K [>600 °C]
Youngs-Module 63 GPa
Hardness according to Mohs ≥ 6
Abraison after 9 h grinding 23,85 Weight.-% 
(Test conditions: DRAIS laboratory mill PML H/V, Speed 13,4 m/s, Filling grade 70 Vol.%; Milling suspension: 4 kg Water, 1 kg Titandioxide, Beads: Art. 4505, 1,25 - 1,65 mm Ǿ)
Storage indication Store in a dry manner in closed (original) container by room temperature.
We recommend storage life of maximum 3 years.
Disposal There is no type of waste that occurs due to the product that requires special supervision according to the German “Closed Substance Waste Management Act” or the 91/689/EWG and 2006/12/EG guidelines.
Safety advice High risk of slipping due to spillage of product

Frequently Asked Questions About Grinding Glass Beads

Q: What are glass beads used for?

A: Glass beads are used in a variety of industries for applications such as cleaning, peening, and finishing. They are commonly used in the automotive, aerospace, and electronics industries.

Q: What is the grinding process for glass beads?

A: The grinding process for glass beads involves using abrasive particles to remove material from the surface of the beads. The beads are held in place by a fixture or chuck, and the abrasive particles are applied to the surface of the beads using a grinding wheel, belt, or disc.

Q: What factors affect the grinding process for glass beads?

A: The factors that affect the grinding process for glass beads include:
  • Abrasive particle size
  • Grinding wheel speed
  • Grinding pressure
  • Use of a coolant

Q: What is the recommended coolant for grinding glass beads?

A: Water-based coolants are commonly used for grinding glass beads.

Q: Can glass beads be ground using hand tools?

A: Glass beads can be ground using hand tools, but this is not recommended as it can be difficult to achieve a consistent size and shape. It is recommended to use specialized equipment for grinding glass beads.

Q: Is it necessary to consult with a professional before grinding glass beads?

A: It is recommended to consult with a professional before grinding glass beads to ensure that you have the right equipment and techniques for your specific needs. Grinding glass beads is a specialized process that requires careful attention to detail.