Pulleys 147
dharm
d:\N-Design\Des9-1.pm5 Seventh Print
20
16
16
16
16
5
3
5
5
5
35
13.5
16
16
16
5
5
5
5
3 × 45°
115
45
(a)
KEYWAY,
6×3
3 × 45° 65
57.5
50
47.5
42.5
22.5
27.5
35
42.5
52.5
f 25
f 45
45
f
95
f
130
816 16 16 168
5 5 5
f
45
f
100
f
115
115
(b)
KEYWAY,6×3
f 85
f 25
Fig. 9.6 Step cone pulley for V-belt drive
9.2.3 Rope Pulley
A rope drive is used for transmission of power over large distances. Ropes of cotton, manilla or
hemp, fitting into circumferential grooves on the pulleys are used for power transmission. The
drive may use either a single or multiple ropes.
A rope pulley is similar to V-belt pulley in construction, except for slight changes in the
grooves as shown Fig. 9.7. This drive is preferred for transmission of power between shafts
located at different elevations and at varying distances. Steel ropes are used for higher power
transmission and in cases such as winch drives, rope ways, overhead cranes, etc.
