Maintenance; Blade Care; Sharpening The Knives; Lubrication - Jet JJP-8BT Operating Instructions And Parts Manual

13.0 Maintenance

13.1 Blade Care

Blades are extremely sharp!
Use caution when cleaning or
changing. Failure to comply may cause serious
injury!
The condition of the blades will affect the
precision of the cut. Observe the quality of the
cut that the machine produces to check the
condition of the blades.
Dull blades will tear, rather than cut the wood
fibers and produce a fuzzy appearance.
Raised grain will occur when dull blades pound
on wood that has varying density. A raised
edge will also be produced where the blades
have been nicked.
When gum and pitch collect on the blades,
carefully remove with a strong solvent. Failure to
remove gum and pitch build up may result in
excessive friction, blade wear and overheating.
When blades become dull, they should be
replaced, or touched up – see sect. 13.2,

Sharpening the Knives.

13.2 Sharpening the Knives
Blades are extremely sharp!
Use caution when handling.
Failure to comply may cause serious injury!
1. Disconnect the machine from the power
source.
2. Remove the blade guard and belt cover.
3. To protect the infeed table from scratches,
partially cover the sharpening stone with paper
(Figure 26).

15.0 Optional Accessories

Stock No. Description
707401 8" Jointer/Planer Blades
707402 8" Jointer Planer Stand
709209 Adjustable Roller Stand, 12.5" wide
4. Lay the stone on the infeed table.
5. Lower the infeed table and turn the cutterhead
by turning the cutterhead pulley. The infeed
table height is set properly when the stone's
surface is flush with the knife bevel.
6. Keep the cutterhead from rotating by grasping
the cutterhead pulley while sliding the stone
back and forth across the table.
7. Take the same amount of passes for all two
blades.
When the blades have been sharpened and still
are not cutting efficiently, trying to touch up the
blades further will only cause the formation of a
second beveled edge. When this starts to happen,
it is time to replace blades with another set. It is
recommended to keep a second set of blades on
hand so that they may be installed while the first
set is being professionally sharpened.

14.0 Lubrication

Use a good grade of light grease on the steel
adjusting screws located in the raising and
lowering mechanisms of the work tables.
The cutterhead ball bearings are lifetime lubricated
and need no further care.
19
Figure 26