Grizzly G0458 Belt Tensioning, Checking V-belt tension with a Straightedge and a ruler

V-Belt Tensioning

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.

Figure 32. Checking V-belt tension with a

straightedge and a ruler.

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.

To adjust V-belt tension:

1.Disconnect power to the sander!

2.Open the pulley cover.

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.

Feed Belt

V-Belt

Motor Mount

Cap Screws

Figure 33. Feed belt V-belt tension.

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

Figure 34. Sanding drum V-belt tension.

NOTICE

New V-belts will often stretch and loosen after moderate use. Check frequently after installation and re-tension if necessary.

G0458 18" Open End Belt/Drum Sander -27-