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E)
After cutting the collar drive the shank through to release the collar and
remove the pin.
2.7
Removal of Blind Core-Bolt Fasteners (Cherry, OSI etc.):
Some fasteners have a separate core bolt, removal of which will facilitate
disassembly, or a much simpler drilling operation. Monogram OSI fasteners are an
example of the former, while Cherry and Huck Unimatic blind fasteners are an
example of the latter. Other types of fasteners may also benefit from similar
techniques. Both OSI and Blind fasteners have specific entries in the Touch-Screen
Display fastener library, but both have specific techniques, listed below:
2.7.1
Monogram OSI Fasteners:
OSI-bolts, as they are known, rarely need to be removed. An OSI can easily
be removed by removing the head off the core-bolt, then driving out the core
and the tail, and then pulling out the body. Typically, an electrode one size
down from the fastener step size is used. For example a 1/4” OSI fastener
core-bolt would be removed using a 3/16” electrode.
2.7.2
Monogram Composi-Lok Fasteners:
Composi-Lok fasteners are typically difficult to remove with their two-piece
construction. These can be removed using either a EG E-Drill or a CG E-Drill
and the plus series of electrodes. These were specifically designed to both
accommodate the slightly larger shank diameter of these fasteners and to
significantly reduce the removal strike force required with the punch buddy. A
standard size Punch Buddy is used when removing the fasteners. Note, when
removing flush head Composi-Lok fasteners it is recommended to use a VHL
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