Figure 20.3 End mill holders also receive straight-shank end mills.
Adapters
Adapters mount various types and sizes of cutters on the spindle. Arbor adapters mount
face mills on the spindle. Collet adapters mount end mills on the spindle. Taper-shank end
mills mount in adapters that have holes with matching tapers. If the taper shank on the
tool is smaller than the hole in the adapter, put a reducing sleeve into the adapter. Shell
end mill adapters come in different sizes to accept different sized shell end mills.
To remove arbors or adapters held with a drawbar, follow these steps:
1.
Loosen the locknut on the drawbar about two turns.
2.
Hit the end of the drawbar with a dead-blow hammer, releasing the arbor or adapter
from the spindle hole.
3.
Hold the arbour or adapter so it won’t fall out of the spindle when the drawbar is
removed.
4.
Unscrew the drawbar and remove the arbour or adapter.
5.
Your machine includes a tapered drift for removing tapers. Follow these steps:
6.
Remove the drawbar.
7.
Extend the mill spindle to expose the outer taper drift slot.
8.
Rotate the spindle to align outer and inner taper drift slots. You will be able to see the
end of the adapter through both slots.
9.
Insert the drift in the slot.
10.
Holding the adapter with one hand, use a non marring hammer (rubber, dead-blow,
or brass) to drive the drift into the slot. The taper on the tool will release and the adapter
drop out.
Cutters mounted in the spindle must fit accurately. There are two ways to make sure they
do. For small cutters, Fit the shank of the arbour that carries the cutter directly into the
taper hole at the end of the spindle. A drawbar holds the arbour in place. For large
cutters, bolt the cutter directly to the end of the spindle.
Holding Milling Cutters
20-2
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Summary of Contents for Midas 1220 XL
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