Wood brochure - South Africa

Klingspor solutions for the wood trade and furniture industry
Stationary sanding
Grit sequence and contact elements
Aside from the abrasive belt itself, there are two additional factors that impact the sanding
result during belt sanding: the type of the contact element and the selected grit sequence.
Contact elements fall into two different categories: contact rollers and so-called sanding shoes.
You can use the table below to determine which contact element is used for which grit size and
in which work step.
Grit size Application Backing Description Contact element
P 24 – 80
Coarse sanding /
calibration
Y-cloth belt
F-paper
Heavy, high strength
Approx. 300 g/m²
Contact roller
P 80 – 180
Pre-sanding
F-paper
Y-cloth belt
Approx. 300 g/m²
Heavy, high strength
Contact shoe,
pressure pad
P 180 – 320
Intermediate
sanding
F-paper
E-paper
D-paper
Approx. 300 g/m²
Approx. 250 g/m²
Approx. 220 g/m²
Contact shoe,
pressure pad
E-paper
Approx. 250 g/m²
P 320 – 800
Fine sanding
D-paper
Approx. 220 g/m²
Contact shoe,
pressure pad
Film backing
Polyester film
P 80 – 400 Profile strips JF cloth backing Light, highly flexible
J-cloth belt
Light, flexible
Profile sanding shoe
Good to know
Belt sanding is usually performed in the direction of the grain. Sanding across the grain will give
a rougher surface finish. While producing a higher chipping volume, sanding against the grain will also
create a surface that is substantially rougher. Exceptions include bevelled wooden frames that do not allow for
sanding with the grain (as the wooden elements are joined at right angles).
The higher the cutting speed, the greater the stock removal per unit of time and the finer the surface finish.
However, higher speeds will also shorten the service life of the abrasive tool.
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