c.For flat-pulley drive systems, verify allowable distance of belt from edge of pulley. Refer to Table 3 below.

Flat-Pulley Alignment

 

 

 

Model

 

Allowable

 

Distance from Edge

 

 

 

 

 

20

 

3/32 in. (2 mm)

 

 

 

25

 

3/32 in. (2 mm)

 

 

 

30

 

3/32 in. (2 mm)

 

 

 

40

 

3/32 in. (2 mm)

 

 

 

50 – 60

 

3/8 in. (10 mm)

 

 

 

 

Table 3

d.For variable-speed models only, verify that V-belts are properly tensioned by applying a set force to the belts and measuring the deflection to determine the belt tension. Refer to Table 4 for the acceptable belt’s tension ranges. Belt tension measurements should be taken as close to the center of the belt span as possible. Refer to Figure 10.

Maintenance

1

2

H039I

1Deflection

2Span Length

Figure 10

Belt Tension Testing for Variable-Speed Models

Model

Belt

Belt Span

Deflection Range

Force

 

Min – Max

 

 

 

 

 

 

 

 

 

 

35, 40

Motor-Basket

16.9 in. (428 mm)

5/16 – 11/32 in. (7.9 – 8.7 mm)

6.1 – 7.4 lbs. (27

– 33 N)

 

 

 

 

 

 

50, 60

Motor-Basket

16.8 in. (426 mm)

9/32 – 5/16 in. (7.1 – 7.9 mm)

6.1 – 7.4 lbs. (27

– 33 N)

 

 

 

 

 

 

80

Motor-Basket

22.1 in. (561 mm)

15/32 – 1/2 in. (11.9 – 12.7 mm)

4.9 – 7.3 lbs. (21.8

– 31.5 N)

 

Single Belt

 

 

 

 

 

 

 

 

 

80

Motor-Basket

22.1 in. (561 mm)

7/32 – 1/4 in. (5.08 – 6.35 mm)

23 – 26 lbs. (102.3 – 115.6 N)

 

Banded Belt

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4

 

 

F232219

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