GRAVITY GOODS ROPEWAY
The deflection of the haulage rope on each
sheave shall not exceed 4.5 degrees
Sheaves shall have a factor of safety
of four against the breaking load it is
subjected to
The hauling rope shall loop around the
driving sheave with an angle not less than
160 degrees and
The cast iron should comply with IS
standard 1732:1989
3.2.2 Bearings
In gravity ropeway, self-
aligning
ball
bearing is used to
prevent it from
misaligning
during
the
installation
and operation
period.
The
appropriate size of
the
bearings corresponding to the diameter of the
shaft of the sheave is chosen from the table
2 below.
N.B. Oil sealed bearing
is preferred than grease
sealed for gravity ropeway
application.
Figure 17: Sectional view of the oil seed bearing
Table 2: Self-aligning ball bearings of cylindrical bore 10000
Bearing No.
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1303
1304
Principal dimensions (mm)
d D B
17 40 12
20 47 14
25 52 15
30 62 16
35 72 17
40 80 18
45 85 19
50 90 20
55 100 21
60 110 22
65 120 23
70 125 24
75 130 25
17 47 14
20 52 15
rsmin
0.6
1.0
1.0
1.0
1.1
1.1
1.1
1.1
1.5
1.5
1.5
1.5
1.5
1.0
1.1
Limiting speeds (rpm)
Grease
12000
10000
9000
7500
6700
6300
5600
5300
4800
4500
4000
3800
3600
11000
9500
Oil
16000
14000
12000
9500
8500
8000
7000
6700
6000
5600
5000
4800
4500
15000
13000
basic load ratings (kN)
Dynamic
6.1
7.7
9.3
12.2
12.2
14.8
16.8
17.5
20.5
23.2
23.8
26.5
29.8
9.6
9.6
Static
2.4
3.2
4.0
5.8
6.6
8.5
9.6
9.8
13.2
15.5
17.2
18.8
21.5
3.7
4.0
mass (kg)
Approx
0.0760
0.1200
0.1400
0.2300
0.3200
0.4100
0.4900
0.5400
0.7200
0.9000
0.9200
1.2900
1.3500
0.1400
0.1700
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