10 Instructor Obtain tubing from
instructor.
20 Lathe Install steady rest on machine.
30 Lathe If chuck size will allow,
lightly chuck internally using
a three jaw chuck. If chuck
size will not allow internal
chucking, lightly chuck
externally using a
three jaw chuck.
40 Lathe Install the cat head.
50 Lathe Bring up the dead center
near the cat head. Visually center
the cat head to the dead center.
60 Lathe Bring the tailstock spindle into
position and lock in place.
70 Lathe Indicate the diameter
of the tube adjust the cat head
as close as possible.
80 Lathe Setup tooling to turn a concentric
bearing surface approx 1-2 inches
from the right end of the tube. (see
print)
90 Lathe Tighten the chuck, be careful not to
use excessive chuck pressure. This
will cause the tube to distort.
100 Lathe Check for distortion using an indicator
on the chucked end of the tube.
110 Instructor Have Instructor
check setup
120 Lathe Turn bearing surface just
enough to clean up.
130 Lathe Run the saddle toward the
tailstock to get it out of
the way.
140 Lathe Position the steady rest
at the bearing surface.
150 Lathe Adjust the lower jaws of the steady
rest to the bearing surface of the tube
and lock in place.
160 Lathe Bring the upper arm down and lock in place.
165 Lathe Adjust the upper jaw of the steady
rest to the bearing surface of the tubing
and lock in place.
170 Lathe Run the tailstock back out of the way.
180 Lathe Carefully remove the cat head.
190 Lathe Face end to clean up.
200 Lathe Setup lathe for boring.
210 Classroom Using the Machinery’s
Handbook calculate the bore
Specifications for each end based
on the roll end sizes. Write sizes in the
space provided.
End 1 Specifications End 2
Specifications
220 Instructor Have Instructor check setup.
And bore specifications.
230 Lathe Bore to specifications.
240 Lathe Deburr Machined end.
250 Lathe Remove tube from the machine.
260 Lathe Back off steady rest Jaws
and move the steady rest
toward the headstock of the machine.
270 Lathe Place anti-distortion plug
in the machined end of tubing.
280 Lathe Tighten the chuck, be careful not to
use excessive chuck pressure.
290 Lathe Install the cat head.
300 Lathe Bring up the dead center
near the cat head. Visually center
the cat head to the dead center.
310 Lathe Bring the tailstock spindle into
position and lock in place.
320 Lathe Indicate the outside diameter
of the tube as close as possible.
330 Lathe Setup tooling to turn a concentric
bearing surface approx 1-2 inches
from the right end of the tube.
340 Lathe Turn bearing surface just
enough to clean up.
350 Lathe Position the steady rest
at the bearing surface.
360 Lathe Adjust the lower jaws of the steady
rest to the bearing surface of the tube
and lock in place.
370 Lathe Bring the upper arm down and lock in place.
380 Lathe Adjust the upper jaw of the steady
rest to the bearing surface of the tube
and lock in place.
390 Lathe Slide the tailstock back, out of the way.
400 Lathe Carefully remove the cat head.
410 Lathe Face part to clean up.
420 Lathe Setup lathe for boring.
430 Instructor Have Instructor
check setup.
440 Lathe Bore to specifications.
450 Lathe Deburr Machined end.
460 Instructor
Have Boring
Inspected
470 Press With the help of the instructor
or technician shrink fit the roll ends
into the tube. Have Welded.
480 Lathe Place the roll between centers.
490 Lathe Indicate the roll at the steady
rest bearing surface. Total indicator
runout should be within 0.002 inches.
500 Instructor Have Instructor check runout.
510 Instructor Instructor plans with student
how to re-machine center holes
if necessary.
520 Lathe Between centers finish turn
the roll ends. Pay close attention
to the bearing journal diameters.
530 Instructor Have Inspected
