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G0458 18" Open End Belt/Drum Sander
-27-
Tools Needed: Qty
Hex Wrenches 4 & 8mm ..............................1 Ea
Phillips Head Screwdriver .................................
1
Pry Bar ..............................................................
1
Proper tension is important for optimum power
transmission. However, too much tension may
cause premature bearing failure.
Correct V-belt tension is achieved when the V-
belts can be deflected
1
⁄2"–
3
⁄4" when pushed in the
middle with moderate pressure. See Figure
32
for an example of how to perform a V-belt deflec
-
tion test with a straightedge and ruler.
V-Belt Tensioning
Figure 32. Checking V-belt tension with a
straightedge and a ruler
.
3. Check the tension of the feed belt V-belt, then
adjust the tension by loosening the motor
mount cap screws shown in
Figure 33 and
pushing down on the motor mount to tighten
the V-belts.
Figure 33. Feed belt V-belt tension.
Always inspect V-belts for damage or dete-
rioration when adjusting for tension. Should
you find evidence of cracking, abrasion or
damage from wood chips or other foreign
materials, replace the belt immediately. Belt
breakage may lead to mechanical damage
or operator injury.
NOTICE
New V-belts will often stretch and loosen
after moderate use. Check frequently after
installation and re-tension if necessary.
Feed Belt
V-Belt
Motor Mount
Cap Screws
4. Tension the sanding drum V-belt by sliding
the idler roller (
Figure 34) into the V-belt until
the belt is correctly tensioned, then replace
the pulley cover.
Idler
Roller
To adjust V-belt tension:
1. Disconnect power to the sander!
2. Open the pulley cover.
Figure 34. Sanding drum V-belt tension.