Using the Mast-R-Lift
To raise your router, turn the height adjustment
handle clockwise. To lower, turn the handle
counter-clockwise. Keep in mind that one
complete revolution equals 1/16” of change.
When your adjustment is complete, remove the
handle and place somewhere off the work
surface for safety. Refer to the chart below for
fractional and decimal adjustments based on
amount of revolutions made.
Fraction Decimal
Number of
Revolutions
1/64”
0.016”
1/4
1/32”
0.031”
1/2
1/16”
0.062”
1 Revolution
1/8”
0.125”
2
1/4”
0.250”
4
1/2”
0.500”
8
Re-Adjusting the Thread Tensioning
All JessEm Lifts feature our patented thread
tensioning design. This feature is why it is not
necessary to lock the router into position after
setting the cutting height. The design keeps
tension on the position wherever you set the
height. Thread tension is set at the factory and
depending on the amount of use you may have to
reset this adjustment periodically. If the bit height
ever begins to change (or drop) during use, the
thread tensioning likely needs to be reset.
1.
Turn the Lift upside down on a table with the
threaded height adjustment rod facing you.
2.
With an open end wrench, (Fig. 7) loosen
the hex nut that is located on the right side of
the brass post next to the threaded rod. Then
use a hex wrench to back out the set screw that
threads through the nut until the brass
tensioning collar can be turned.
Figure 7
Figure 8
3. Then route the brass tensioning
collar (Fig. 8) with vertical grooves, so
it tightens against the rubber washer.
Note: A drop of oil on the rubber
washer eases the rotation of the
brass collar.
4. Make certain the set screw seats
in one of the vertical grooves when
tightening the brass collar.
5. Tighten the nylon lock nut with the
open end wrench again and the
adjustment is complete.
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