8999118EN: v1.1 21/12/2020
30
Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
Checking belt tension
Tension is correct when a force of 1 kg is exerted on the belts at their mid-point between the upper and lower
pulleys which deviates the belts by 15mm.
After the first 2 hours of work re-check the belt tension and taper locks, see 1 & 2 in Figure 6.3. Tighten if
required, torque setting for Taper Locks is 40Nm.
Belt Tension
;
12mm deviation under 15kg pressure at mid-point of belt run
Taper Locks
;
Check tightness on new machines after initial 2 hours of work
The tension may vary depending on the size of the machine. To check and maintain the correct belt tension
follow the instructions below;
Figure 6.3
Belt Adjustment
– Manual Tension Plate
Adjustment of the belt tension is performed by loosening the 4 bolts on the inner bearing collar (A) and the 4
bolts on the outer bearing collar (B), see Figure 6.4 below. Then using a spanner loosen off the locking nuts on
the bearing tensioners (C) and then rotate the bolts (D) up or down to increase belt tension until belt deviation
matches the required measurement
– see above. Once the correct belt tension is achieved, tighten up the nut
(C) to lock the bolt in position.
Ensure that once the belt has been tensioned correctly that the pulleys are level with each other. This can be
achieved by using a Straight Edge (E) and tightening the loosened bolts on the bearing collars (A+B) until they’re
level.
Figure 6.4
1
15k
2
12mm
C
D
C
A
D
Straight
Edge
B
E
