Grinding and lapping products
Grinding
Grinding is a machining process during which every grain which comes into contact with the material rips a minute chip out of the material.
According toDIN 8580, this process is a cutting process.
Grinding is used for:
- grinding tools to sharpen the cutting edges of tools, e.g. drill bits, saws, lathe tools, milling cutters, either manually or by machine.
- smoothing surfaces.
- finishing of hardened surfaces, e.g. sealing faces, gauges, bearing faces.
Grinding achieves higher removal rates which means that grinding is more economical.
EFCO-GSS - Grinding Tools (CBN) |
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The EFCO GSS grinding tools are coated with cubic crystalline boron nitride (CBN) of grain size B252 with galvanic bond. |
Lapping
Lapping is a machining process to smooth surfaces.
An abrasive embedded in a lubricant is used for lapping. In contrast to grinding where the abrasive is anchored to the backing material lapping works with moving (rolling) grain.
DIN 8589 divides lapping into two groups:
- Lapping with lapping paste
- Lapping with lapping liquid
Lapping with lapping paste
Lapping plates / lapping spindles of grey iron are used for lapping. Lapping pastes can be applied to the sealing face or lapping plate / lapping spindle constantly as required. After lapping, sealing face and lapping palte must be degreased and cleaned to 100 %.
Lapping with lapping liquid
Selection of the correct lapping agent:
- Aluminium oxide Al2O3 - for machining semiconductor materials (e.g. silicone and germanium), light alloys and non-ferrous metals, coal, plastics, soft steel, cast iron, etc.
- Silicon carbide SiC - for the machining of grey iron, steel (soft, hardened, alloyed), stellite, ceramics, glass, plastics, titanium, carbide, etc.
- Boron carbide B4C - for the machining of carbide, ceramics, etc.
