APP 011 BELT DRIVE
Page 3
TABLE
Belt
Section
Force required to deflect belt 16 mm per metre of span
Basic setting force
New Belt setting force
Small Pulley
Ø mm
Newton
(N)
Kilogram
force
(kgf)
Newton
(N)
Kilogram
force
(kgf)
SPZ
XPZ & QXPZ
58 to 71
16
1.6
20
2.0
75 to 90
18
1.8
22
2.2
95 to 125
20
2.0
25
2.5
Over 125
22
2.2
28
2.8
SPA HSPA
XPA & QXPA
80 to 100
22
2.2
28
2.8
106 to 140
30
3.0
38
3.9
150 to 200
36
3.7
45
4.6
Over 200
40
4.0
50
5.1
SPB HSPB
XPB & QXPB
112 to 160
40
4.0
50
5.1
170 to 224
50
5.1
62
6.3
236 to 355
62
6.3
77
7.9
Over 355
65
6.6
81
8.3
SPC
224 to 250
70
7.1
87
8.9
265 to 355
92
9.4
115
12.0
Over 375
115
12.0
144
15.0
8V
335 & above
150
15.0
190
19.0
Z
56 to 100
5 to 7.5
0.5 to 0.8
A (& HA banded)
80 to 140
10 to 15
1.0 to 1.5
B
125 to 200
20 to 30
2.0 to 3.1
C
200 to 400
40 to 60
4.1 to 6.1
D
355 to 600
70 to 105
7.1 to 10.7
Method of Belt Tensioning Using a Belt Tension Indicator.
1. Calculate the deflection distance in mm, on a basis of 16 mm per metre of span.
Centre distance (m) X 16 = Deflection (mm). If distance & deflection is known, go to .2.
2. Set the lower marker ring at the deflection distance required in mm on the lower scale.
3. Set the upper marker ring against the bottom edge of the top tube.
4. Place the belt tension indicator on top of the belt at the centre of span. And apply a force at right angles
to the belt deflecting it to the point where the lower marker ring is level with the adjacent belt, on single
belt drives place a straight edge across the two pulleys to act as a datum.
5. Read off the force value indicated by the top edge of the upper marker ring.
6. Compare this force to kgf value shown in the table above.
7. Tighten or loosen belt tensioning screws to achieve the correct value.
8. If the measured force falls within the values given, the drive should be satisfactory.
BELT TENSION INDICATOR
Note:- If a belt tension indicator is not available, a suitably scaled spring balance and rule will
suffice.
DEFLECTION
IN mm
DEFLECTION FORCE
IN kgf
Содержание Reavell 5236
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