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3.5 Selection of speed of belt grinder
The belt grinder is a two-speed belt grinder.
High speed is used for cleaning the pipes together with 60-80 grit sanding belts.
Low speed is used for finishing and polishing. After cleaning the pipes, a 180-400 grit
sanding belt is used for finishing. The last process is polishing and here a 600-1200
grit sanding belt is used. Note that optimal polishing is achieved using as light a
pressure as possible with the drive wheel. This applies especially during the final
polishing stage.
KEF Group offers a starter pack of the above sanding belts in grades adapted to the
processes: cleaning, finishing and polishing. Upon delivery, the standard sanding
belt is VSM K180 on the belt grinder. Please contact us for further information.
Now place the pipe between drive wheels, support and the contact wheel of the belt
grinder with the sanding belt. Adjust the pipe clamps so that they support the pipe on
both sides of the machine. The two motors on the belt grinder and propulsion unit can
now be started at the desired speed. Start in the middle of the pipe to see the result of
the set-up.
3.6 Feed speed and direction
Feed speed and direction, called feeding hereafter, are determined by the angle of the
propulsion jig, as shown in grey below (diagram 3.5). The feed is changed by turning the
propulsion jig a few degrees to one side or the other. The greater the angle, the greater the
feed speed.
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