Air Handling units AeroMaster XP
19
Table 5
– Belt tensioning forces
*The force needed to deflect the belt to achieve 16 mm belt slack at a distance be-
tween pulley axes of A = 1000 mm.
Belt
profile
Small pulley
diameter
Recommended force
to deflect the belt [N]*
Figure 25
– Taper Lock® collet
Assembly
Disassembly
Before collet and pulley assembly, carefully clean
the inner collet opening and taper surface.
Insert the collet into the pulley hub so that the
threaded openings will check with the openings
without thread.
Tighten the fixing screws by hand.
Carefully clean the shaft, and place the pulley in the
required position. Tighten the fixing screws alter-
nately with the prescribed tightening torque.
Loosen the fixing screws, and insert one or two of
them as force-off screws (according to the collet
size) into the withdrawal openings. Knock slightly
on the pulley. Keep tightening the force-off screws
until the collet is released from the pulley.
Operating Checks and Service Regulations
Table 6
– Taper-Lock collet tightening torques
1008
1108
1210
1610
1615
2012
2517
3020
3030
Taper-Lock
3525
3535
4030
4040
4535
4545
5040
5050
5,6
5,6
20
20
20
30
50
90
90
Utahovací moment (Nm)
115
115
170
170
190
190
270
270
Tightening torque (Nm)
Figure 24
– Pulley alignment
Table 7 – Pulley alignment tolerances
wrong
Parallel
Angular
correct
Misalignment type
M
ax. Misalignment range
Angular
0,25°
Parallel
1 % (0,25°)
Chart 1
–
Belt slack „S“ and pulley axes distance „A“relation
F
Check pulley alignment
After replacing and tensioning the belts or pulleys, it is necessary to
check the alignment of the pulleys (use a metal ruler or other suitable
alignment measuring equipment, see figure 24). Specifications of limit
values are included in table 7.
The following applies:
Parallel:
Maximum misalignment of parallel planes: 0.01 x axis distance (i.e., max.
10 mm at axis distance of 1 m)
Angular:
Misalignment of the pulley from the plane: 0.25° for each meter of
distance (i.e., max. 0.5° at axis distance of 2 m)
The pulleys are equipped with Taper-Lock collets which enable their
alignment (see figure # 25). The torque values for the set screws on the
clamping hubs are included in table 6.
