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Consider suitable local section for showing other details. 18.3.14 Four Jaw
Chuck Four jaw chuck is a device used to hold jobs accurately on a lathe. Unlike
three jaw self-centring chuck, it can hold both regular and irregular shapes of
objects.
2
Principles of Process Planning: A Logical Approach
Chuck with collet The reasons for using collet are similar to those for the three-
jaw chuck, except that the collet is more accurate. The part to be chucked must
have a smooth surface. Chuck with four-jaw chuck (independent) Four contact
points ...
G. Halevi, R. Weill, 1995
3
Precision Machining Technology
Figure 5.2.6 shows some uses of a four-jaw chuck. FIGURE 5.2.6 (A) A four-jaw
independent chuck can be used to hold square work. (B) It can also hold a
workpiece eccentrically, or off-center. A B FIGURE 5.2.7 A dial indicator being
used to ...
Peter Hoffman, Eric Hopewell, Brian Janes, 2014
4
FCS Fitting and Turning L2
The two types of chucks that you use on the lathe are the three-jaw chuck and the
four-jaw chuck. A three-jaw chuck can hold round and hexagonal work pieces.
When the chuck is closed by turning the chuck key, the three jaws all move at the
...
Jenny Schnetler, Salie Majiet, 2007
5
ELEMENTS OF MANUFACTURING PROCESSES
This chuck is suitable for holding round or hexagonal and other similar shaped
workpieces. The gripping force of the three-j aw chuck is less than that of the four-
jaw chuck. Four-jaw chuck. The four-jaw chuck is a very versatile workholding ...
B. S. NAGENDRA PARASHAR, R. K. MITTAL, 2002
6
Basic Mechanical Engineering
This type of chuck is preferred for holding non-symmetrical workpieces, rough
castings, and parts of irregular shape Fig. (5.7). Fig. 5.7 Four Jaw Chuck.
Combination chuck As the name implies a combination chuck provides the
advantages of ...
7
Manufacturing Technology: Metal Cutting and Machine Tools
This is generally used for heavy workpieces and for any configuration. Jaw screw
Concentric circles Jaw The jaws in a 4-jaw chuck can be reversed for. Fig. 4.5
Schematic layout of a four-jaw chuck Live centre 60° Dead centre Points Fig.
Posinasetti Nageswara Rao, 2000
8
Metalworking: A Book of Tools, Materials, and Processes for ...
to produce a cheaper substitute for this somewhat expensive appliance. In the
four-jaw chuck shown by Figs. 1200 to 1203, each jaw has independent motion,
this allowing the chuck to hold work irregular Fig. 1102. Fig. 1193. Fig. 1194. Figs
.
Paul Nooncree Hasluck, 1904
9
Manufacturing Processes - I
A four-jaw chuck is operated by a separate square threaded screw and each jaw
moves separately. The different types of chucks used on lathes are shown in Fig.
3.10. Jaw plate having slots of various sizes at different angles. Solid reversible ...
10
Engineering Fundamentals
1 0 9 8 7 6 5 4 Key socket Square thread screw Body Key Taper to match spindle
nose Keyway Thrust pad Reversible jaws Figure 10.22 The four-jaw chuck • Work
that must be deliberately offset to run eccentrically. Eccentrically mounted work ...
