Assembly Drawings 327
dharm
d:\N-Design\Des18-3.pm5
KEY WAY,
8×4
f
30
16
56
16
(^1018)
48
2
f 16
R15
(^57) f^55
f 16
56
f 16
18
3 f 30
f 30
56
4
KEY WAY,
8×4
f^30
SLOPE,
1:100
40
1
6
8
8
f 25
10
f 16
6
100
f 25
12 f^166
5
HOLE FOR DIA 3
TAPER PIN
Sl. No. Name Matl. Qty.
1 2 3 4 5 6
Shaft
Fork
Central block
Pin
Collar
Key
MS
FS
FS
MS
MS
MS
2 2 1 2 2 2
Parts list
Fig. 18.44 Universal coupling
Figure 18.44 shows the details of universal coupling. The forks 2 are mounted at the ends
of two shafts 1, making use of sunk keys 6. The central block 3, having two arms at right angle
to each other, is placed between the forks and connected to both of them by using pins 4 and
collars 5. A taper pin (not shown) is used to keep the pins 4 in position. During rotation of shafts,
the angle between them can be varied. Figure 7.11b shows the assembly drawing.
Exercise
Assemble the parts of universal coupling and, shown in Fig. 18.44 and draw, (i) sectional view
from the front and (ii) view from the right.
18.5.7 Plummer Block
This bearing is used for long shafts, requiring intermediate support, especially when the shaft
cannot be introduced into the bearing, end-wise.
