Name of the job: How to cut external
thread on a cylindrical job
Included
instruments:
1) Lathe
machine
2) A
job , where we have to make thread
3) A
slide calipers
4) A
outside caliper
5) A
wooden mallate
Process
of working: At first we have to know that how many threads
contains in one inch.
And determine it correctly.
Now I am saying simply step by step about this
operation.
A. At first take a sylindrical metal piece where
have to cut thread.
B. Sat this job piece on lathe chulk in perfect
alaignment
C. If
there is have any sampol ,take those and take a measurment from this about how
many single thread in each inch.
D. Imagine
this number is 5, so move your eye to the chart
which attached with quick change gear box.
E. Find out number 5 in the chart. And at first
see that what is writtend on root of its row. Really there have 8:1 and C . so
sat the gear drives by 8:1 side and turn number liver on C.
F. Now
look at top of the collumn of 5 ritten box. There will have number 6. It is number
of speed gear.
G. So
sat the speed gear on number six.
H. Put
a correct degree pointed cutting tool on tol post in proper alaignment.
I.
Turn on the lead screw lever.
J. Start
the machine and start to cut the thread.
K. Continue
visiting on operation and wait to arraibe cutting tool on last end of thread .
then turn off the machine or give a back auto feed on lead screw.
L. Continue
cheak deepness so that deepness is not overcome fixed measure . if it is be too
deep then right size, the job will be useless!
M. So when it will come at fixed size , then stop
machine and stop operation.
N. Visit
this job piece and finally be sure that it is in accurate size.
O. If
not , then put in chalk and make operation again and make perfect thread .
Caution
:
Ø Don’t make wrong when take the size of thread
in inch.
Ø Always
continue visiting when operation is on.
Ø Put
the lever by corretc instruction.
