SANDING MEDIUM
SOUND ARGUMENTS.
A quality machine also needs a quality accessory. For sanders a wide range of accessories are required to give the best finish for a wide range of materials. Be it for wood, metal, stone, paint, varnish or filler Metabo has the
right accessory for the machine and the material. At Metabo we do not just make accessories for our own machines but for other manufactures as well.
Structure and purpose of Metabo abrasive mediums
The sanding compound
carries the grains and transfers the chip removal forces. Besides high strength and small expansion, the sanding compound has to render a sanding process matching flexibility .
Carriers are
– Highly compressed papers of various thicknesses.
– Fabric based on polyester and cotton wool of various strengths.
– Vulcanized fibre as a strong and
The abrasive grain
is the actual sanding tool. It penetrates the material to be worked on and removes the surface. The abrasive grain is anchored on the grain- holding medium. High hardness, toughness and a sharp edged geometry are the most important attributes of the abrasive grain.
For top quality sanding medium only synthetic abrasive grain materials are used.
Abrasive grain types are
– Corundum (Aluminiumoxide) as a hard, slightly brittle grain for the processing of metal, wood, lacquers.... of rough- and
fine ground finishes.
– Silicon carbide as a hard,
– Aluminous zircon as a tough and fine crystalline combination of Aluminiumoxide and aluminous zircon for the processing of metal and
The bonding agent
anchors the abrasive grain in the sanding compound carrier and supports it against the forces generated by the removal of the surface material.
Bonding agents are
– Phenolic resins and partially synthetic resins for sufficient support with a certain elasticity.
Abrasive grain | Covering |
(Corundum, | bonding |
silicone | material |
carbide) | (Phenolic resin) |
More | Basic |
grind- | bond |
active | (Phenolic |
Coat | resin) |
Sanding compound carrier: Paper, fabric, fibre or a
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