Ceramics | Why Sodick technology attracts users !

Ceramics

Ceramics offer a wide range of advantages when compared with other materials such as sheet or plastic.
It is light, and yet hard, stable and resistant to ageing. It doesn’t rust, has a high electrical resistance, and scarcely changes at all under the effects of heat.
Its coefficient of thermal expansion is one third that of cast iron. In other words, ceramics are ideal for EDM. In order to minimize thermal deformation caused by temperature fluctuation, the persistence of Sodick’s engineers found better material, Ceramics. This high-tech materials can be applied economically. Many ceramic components manufactured by Sodick are used in critical areas such as the upper & lower arms, base plate and pedestals.

For its excellence of ceramics, gauges, scales, etc of Sodick are being sold to general users on the market.


Ceramic components for EDM	Ceramic gauges for sales

Comparison of material characteristics		Alumina ceramics (Sodick)	Stone (Granite)	Casting (FC30)
Specific gravity	g/cm³	3.5 to 3.9	2.6 to 3.0	7.3
Water absorption	%	0	0.0 to 0.2	0.002
Hardness	HV	1300 to 1800	600 to 1000	620
Bending strength	kgf/cm²	3000 to 4000	300 to 1000	4000
Young's modulus	X10-6Kgf/cm²	2.7 to 3.5	0.3 to 0.9	1.1
Specific heat	Cal/g · Cº	0.19 to 0.24	0.17	0.13
Thermal conductivity	Cal/cm · sec · Cº	0.033 to 0.055	0.003 to 0.006	0.075 to 0.13
Coefficient of thermal expansion	X10-6^-6 / Cº	4.7 to 7.8	5.5 to 9.1	9 to 12
Volumetric specific resistance	Ω · cm	>10¹⁴	6 x 10⁹	>10¹
Corrosion resistance

Sodick made ceramic components are used in strategic paths of the machine; such as, the upper and lower arms, work pedestals, and worktable.
The ceramic components provide increased thermal stability which leads to workpiece accurately.
Eroded particles do not adhere to the ceramic components resulting in a constant cutting speed throughout the life of the machine.