26. When you have completed the operation,
closely as possible to the cutter. Make sure
that the work and the vise will clear all parts
stop the spindle and return the work to the
of the machine.
opposite side of the cutter.
8. Install the arbor nut and tighten it finger tight
27. Deburr the work and remove it from the vise.
To machine the second side, place the work in the
9. Position the overarm and mount the arbor
finish machine side 2, using the same procedures that
you used for side 1. When you have completed side 2,
10. After supporting the arbor, tighten the arbor
deburr the surface and remove the work from the vise.
nut with a wrench.
Place the work in the vise, as shown in figure
11. Set the spindle directional control lever to
7-55, view C, with side 3 up. Then, rough machine
give the required direction of cutter rotation.
side 3. Finish machine side 3 for a short distance,
12. Determine the required speed and feed, and
disengage the spindle and feed, and return the work to
set the spindle speed and feed controls.
the starting point, clear of the cutter. Now you can
safely measure the distance between sides 2 and 3. If
13. Set the feed trip dogs for the desired length of
this distance is correct, you can continue the cut with
cut and center the work under the cutter.
the same setting. If it is not, adjust the depth of cut as
14. Lock the saddle.
necessary. If the trial finishing cut is not deep
enough, raise the work slightly and take another trial
15. Engage the spindle clutch and pick up the cut.
cut. If the trial cut is too deep, you will have to
remove the backlash from the vertical feed before
16. Pick up the surface of the work by holding a
taking the new depth of cut. Use the following
long strip of paper between the rotating cutter
procedure to remove the backlash:
and the work; very slowly move the work
toward the cutter until the paper strip is
Lower the knee well past the original depth
pulled between the cutter and the work.
of the roughing cut.
Keep your fingers away from the cutter. A
rotating milling cutter is very dangerous.
Raise the knee the correct distance for the
17. Move the work longitudinally away from the
cutter and set the vertical feed graduated
Engage the feed and complete your cut.
collar at ZERO.
Stop the spindle.
18. Compute the depth of the roughing cut and
raise the knee this distance.
Return the work to the starting point on the
other side of the cutter.
19. Lock the knee, and direct the coolant flow on
the work and on the outgoing side of the
Deburr the work.
Remove the work from the vise.
20. Position the cutter to within 1/16 inch of the
work, using hand table feed.
view D, and machine the side, using the same
21. Engage the power feed.
procedure as for side 3. When you have completed
22. After completing the cut, stop the spindle.
side 4, remove the work from the vise and check it for
23. Return the work to its starting point on the
other side of the cutter.
This completes the machining of the four sides of
the block. If the block is not too long, you can rough
24. Raise the table the distance required for the
and finish mill the ends to size in the same manner in
which you milled the sides. Do this by placing the
block on end in the vise. You also may use face
25. Set the finishing speed and feed, and take the