188 Machine Drawing
dharm
d:\N-Design\Des12-1.pm5
12.2 Draw the following views of a plummer block, suitable for supporting a shaft of diameter 50mm:
(a) half sectional view from the front, with left half in section,
(b) sectional view from the side, and
(c) view from above.
12.3 Sketch any two designs used to prevent rotational movement of the bearing brasses.
12.4 Sketch the necessary views of a foot-step bearing, for supporting a shaft of diameter 50mm. Give
all important proportionate dimensions.
12.5 Indicating proportionate dimensions, sketch the necessary views of the following types of bear-
ings:
(a) wall bracket with a pedastal bearing,
(b) pillar bracket with a pedastal bearing, and
(c) J-hanger with a pedastal bearing.
12.6 Sketch a ball bearing and indicate the various parts of it.
12.7 Illustrate through sketches, the mountings of (a) radial ball bearing and (b) thrust ball bearing.
12.8 Sketch the sectional views of the following:
(a) single row ball bearing, (b) cylindrical roller bearing,
(c) taper roller bearing and (d) thrust ball bearing.
12.9 Draw (a) view from the front and (b) sectional view from the side of a plummer block with double
row self-aligning ball bearing, suitable for supporting a shaft of diameter 30mm.
12.10 Draw (a) sectional view from the front and (b) view from above of a foot-step bearing with radial
and thrust ball bearings, suitable for supporting a shaft of diameter 60mm.
12.11 Indicating proportionate dimensions, sketch half sectional view from the front of a revolving
centre, using thrust ball bearing, taper roller bearing and a double row ball bearing.