Grinding Media

(Authorized dealers - DISTRIBUTOR of Preciballs S.A)

Ceramic Balls

Ceramic Balls are mainly used in harsh environments. Their main advantages on steel is that they have a density 40% lower than steel, have 29% lower thermal expansion and are 150% harder. In certain high-speed applications their life is extended hundred times. It is also used as grinding media. 3 main types are-

Alumina Oxide - Ceramic Balls
Composition 99.5% Al2O3 / 0.5% other
Hardness 1700 Hv
Ultimate Tensile Strength 31,000 psi
Ultimate Compressive Strength 31,000 psi
Modulus of Elasticity 53 x106 psi
Maximum Working Temperature 1400oC
Corrosion Resistance Inert except for hydruofluric, hydrochloric acid and hot concentrated sulphuric acids. Inert to most substances, not recommended for environments of strong alkaline solutions

Zirconia Oxide - Ceramic Balls
Composition 97% ZrO2 / 3% MgO
Hardness 80 - 84 Ra
Ultimate Tensile Strength 60,000 psi
Ultimate Compressive Strength 285,000 psi
Modulus of Elasticity 29 x106 psi
Maximum Working Temperature 2400oC
Corrosion Resistance Inert to most substances, not recommended for environments of hydrochloric or strong alkaline solutions

Silicon Nitride - ceramic balls
Composition 87% Si3N4 / 13% other
Hardness 1400 - 1700 Hv
Ultimate Tensile Strength /
Ultimate Compressive Strength >570,000 psi
Modulus of Elasticity 44-45 x106 psi
Maximum Working Temperature 1000oC
Corrosion Resistance Inert to most substances.

Chrome Steel Balls

Chrome Steel Balls are widely used in high speed ball bearings, valve industry, as well as, in a number of other industrial applications. Chrome steel balls have excellent surface quality, high hardness, high load bearing capacity and wear resistance, as a result of through hardening.

Chrome Steel Balls of 2mm OD,Hardness should be around 60HRC:

  • China GCr15- P 0.03 % max.
  • Hardness 60-66°HRC.
  • Density 7.85 g/cm³


  • Ball Bearings.
  • Valve Industry.
  • Ball Screws.
  • Automotive Industry.
  • Machine Tools.
  • Grinding Applications.

Stainless Steel Balls


  • Grinding of solids and fluids.
  • Liquids dispersion.
  • Fine particle size reduction.
  • Homogenization of fillers and raw materials.
  • Attrition and pulverizing applications in ball, vibro, dyno, pearl, bead, pebble, attritor and small-media mills, vertical or horizontal.

Stainless steel balls and other shapes are used for grinding applications where absolutely no iron contamination is permissible, specially in food products:

Specification (stainless steel balls) Hardness Density
AISI 420 55/58 Hrc 7.75
AISI 440C 58/64 Hrc 7.75
AISI 302 25/39 Hrc 7.93
AISI 304(L) 25/39 Hrc 7.93
AISI 316(L) 25/39 Hrc 7.98
AISI 904 150/300 HV 8
AISI 430 135/380 HV 7.68

About Us

We at ShiftAir undertake various projects and provide all the possible materials for the Automotive Industry. Shiftair Pneumatic is an ISO 9001:2008 certified company and . We are professionally managed organization with the high quality of pneumatic products manufacturing and assembly.