The
Pin
Column
Mo
del
The
atland
mo
del
of
lo
c
ks
can
explain
eects
that
inv
olv
e
more
than
one
pin,
but
a
dieren
t
mo del
is
needed
to
explain
the
detailed
b ehavior
of
a
single
pin.
See
Figure
5.1.
The
pin-column
mo
del
highlights
the
relationship
b
et
w
een
the
torque
applied
and
the
amount
of
force
needed
to
lift
eac
h
pin.
It
is
essential
that
you
understand
this
relationship.
In
order
to
understand
the
"feel"
of
lo
c
k
pic
king
y
ou
need
to
kno
w
ho
w
the
mov
emen
t
of
a
pin
is
eect
by
the
torque
applied
by
your
torque
wrenc
h
(tensioner)
and
the
pressure
applied
by
y
our
pick.
A
go
o d
wa
y
to
represent
this
understanding
is
a
graph
that
shows
the
minimum
pressure
needed
to
mov
e
a
pin
as
a
function
of
ho
w
far
the
pin
has
b een
displaced
from
its
initial
p osition.
The
remainder
of
this