-3- T24631 6" spiral Cutterhead
16. Move the straightedge to the other side to
determine if one end of the cutterhead body
is higher/lower than the other. (Place the
feeler gauge between the cutterhead body
and the straightedge to determine the height
difference.)
—if the cutterhead is even or within 0.004"
with the outfeed table from one side to the
other, skip to step 19.
—if the cutterhead is over 0.004" from one
side to the other, go to step 17.
17. Loosen the hex nuts securing both bearing
block studs, lift the spiral cutterhead slightly,
then place a shim beneath the bearing block
that needs to be adjusted.
note: Use the shims from your old cutterhead
if available. If not available, newspaper is
approximately 0.003" thick and will work for
shimming (we don't recommend shimming
more than 0.004" on either side, as this may
affect how the bearing block seats in the cast-
ing).
18. repeat steps 15–17 and adjust if necessary,
then tighten the hex nuts on the bearing block
studs.
StraightedgeOutfeed Table
figure 7. Checking cutterhead parallelism.
14. Tighten the spiral cutterhead in place, and
ensure both pulley setscrews are tight.
figure 6. example of spiral cutterhead installed.
15. Using the straightedge and feeler gauge set,
inspect the cutterhead parallelism with the
outfeed table as shown in figure 7. With the
straightedge in position, raise or lower the
outfeed table until the cutterhead body (not
the carbide insert) just touches the straight-
edge.
9. remove the bearings and bearing blocks
from the cutterhead. There are numerous
ways to do this, but avoid prying on them—
they must be pulled off evenly and with care.
if you are unsure about how to proceed, seek
help from a mechanic/machinist, or numer-
ous resources can be found on the internet.
note: It is difficult to remove the bearings
without damaging them. This is why we
strongly recommend installing new bearings
on the cutterhead—instead of trying to reuse
the original ones and then repeating this pro-
cedure again in the near future.
10. install bearings in the bearing blocks, then
install the bearing blocks on the cutterhead.
To avoid damaging the new bearings or the
cutterhead shaft, use a arbor press or have a
mechanic/machinist install these for you.
if neither of the above are acceptable options,
install the bearings by gently tap ping them
with a block of wood and a rubber dead blow
hammer. if you do this, take your time and
make sure they install as evenly as possible.
11. re-install the key onto the keyway, then press
the pulley onto the new cutterhead shaft.
12. re-install the bearing block studs onto the
bearing blocks.
13. install the cutterhead (figure 6) with the lock
washers and hex nuts previously removed.