This is a detailed PPT of Cross-slide, Compound rest and Tool-post Assembly of Lathe from Manufacturing Processes.

1. Cross-slide, Compound rest and
Tool-post Assembly of Lathe
Made by:-
Udit J. Modi
B.Tech, Mechanical Engineering,
Nirma University

4. The tool bit is mounted in the tool-post which may be of
the American lantern style, traditional four-sided square
style, or a quick-change style such as the multifix
arrangement pictured.
The advantage of a quick change set-up is to allow an
unlimited number of tools to be used (up to the number of
holders available) rather than being limited to one tool
with the lantern style, or to four tools with the four-sided
type.
Interchangeable tool holders allow all tools to be preset
to a center height that does not change, even if the
holder is removed from the machine.

7.  Following table indicates the production output in 1 day and 1 month.
However, by each production, time is saved as mentioned above and
eventually, cost savings done on it and profit is gained.
 Every firm is interested in marginal cost and revenue generated which
is shown in percentage (%) as “percentage increase” and “revenue
increase”.

8. High Productivity

9. • The compound rest (or top slide) is usually where the
tool post is mounted.
• It provides a smaller amount of movement (less than the
cross-slide) along its axis via another feedscrew.
• The compound rest axis can be adjusted independently
of the carriage or cross-slide.
• It is used for turning tapers, to control depth of cut when
screw cutting or precision facing, or to obtain finer feeds
(under manual control) than the feed shaft permits.
• Usually, the compound rest has a protractor marked in its
base , enabling the operator to adjust its axis to precise
angles.

10. We can calculate the cost b
identifying the mass (in Kg)
used in manufacturing of
Tool-post and Compound res
The material used for it is
Cast Iron and its density is
7.17 g/sq. cm.
The mass of entire assemb
can be calculated by
M = Volume* Density
The total volume can be estimated by different geometry like
rectangle and circle(Holes) is 395041.875 cubic mm.

11. Free body diagrams of
geometries(parts) are taken.

12. For cast iron,the rate is 1.49 USD/Kg which equals
to115Rs./Kg
So,for 3 Kg, the cost material is appro. Rs. 345/-
For general casting cost,
1.52 USD/Kg =120 Rs./Kg
So, for 3 Kg= Rs. 360
The general labour cost for each specimen is Rs.
(6.83+22.33)= Rs. 30.16/- and time taken is nearly 26
min.
The general cost for precision machining of casted
product is around Rs.110per kg &for 3 Kg,
machining cost is Rs. 330 and time
taken by machining is (15-20)min.
So, the TOTAL COST is carried to
Rs.1,066/- & TOTAL TIME taken

13.  The cross-slide rides on carriag
and has a feedscrew which travels
at right angles to the main spindle
axis.
 This permits facing operations
to be performed, and the depth of
cut to be adjusted. This feedscrew
can be engaged, through a gear
train, to the feed shaft to provide
automated 'power feed' movement
to the cross-slide.
 On most lathes, only one directio
can be engaged at a time as an
interlock mechanism will shut out th
second gear train.
 Cross-slide wheels are usually
marked in terms of the diameter of part, so one graduation representing .001 inches
diameter corresponds to .0005 inches of cross-slide motion.

14. • The figure of
cross-slide is
depicted here.
• The material
used in making
of it is also
Plain Cast Iron,
whose density
is
6.8 g/cubic
cm.
• Similarly, the
mass can be
obtained by formula:- Mass=Volume*Density
 The total volume can be estimated by different geometry like rectangle with s
3614400 cubic mm.

15. Free body diagrams of
geometries(parts) are taken.

16. For cast iron,the rate is 1.49 USD/Kg which equals
to115Rs./Kg
So,for Kg, the cost material is appro. Rs.
For general casting cost,
1.52 USD/Kg =115 Rs./Kg
So, for Kg= Rs.
The general labour cost for each specimen is Rs.
(6.83+22.33)= Rs. 30.16/- and time taken is nearly 26
min.
The general cost for precision machining of casted
product is around Rs.110per kg &for Kg,
machining cost is Rs. And time
taken by machining is (10-15)min.
So, the TOTAL COST is carried to
Rs. and TOTAL TIME taken will

20. • An average load of 40% for 4 hours per day. With a 2 HP
motor, that would equal about 0.40 X 2,000 watts x 4
hours = 3200 watt hours, or 3.2 KWH. Assuming 10-12
cents per KWH, the lathe would probably cost less than
50 cents per day.

21. I. tool%20post%20of%20lathe.pdf
II. https://www.wisetool.com/manufacturing/time.htm
III. Wikipedia
IV. https://www.practicalmachinist.com/
V. https://www.wisetool.com/manufacturing/time.htm
VI. https://www.mech4study.com/
VII. https://www.mechanicalbooster.com/
And many other small resources……..