Jet jj-6csdx User Manual

 

20 

  Planer knives are dangerously 

sharp. Use extreme caution when inspecting, 
removing, sharpening, or replacing knives. 
Failure to comply may cause serious injury. 

To remove and replace a knife (Refer to 
Figure 29): 

1. Remove four gib screws (A) with a 4mm hex 

wrench. 

2. Remove 

the 

gib (B) and knife (C). 

If the knife is being reused (knives are double-
edged), clean the knife, gib and cutterhead of 
all pitch and debris. 

3.  Lay the new knife or unused edge of the old 

knife back onto the cutterhead (D). 

4. Replace the gib (B) and screws (A). Finger 

tighten only at this time. 

5.  Press against the cutting edge of the knife at 

the center of the blade with a piece of wood. 
DO NOT USE FINGERS! This is to ensure that 
the cam is making proper contact with the 
knife. 

6.  Snug the inside two screws, then the outside 

two screws.  

7.  Release the piece of wood pressing against 

the knife and tighten the gib screws. 

8.  Replace the remaining two blades by repeating 

steps 1 – 7. 

9.  Determine if knives need to be set. 

Follow the Outfeed Table Adjustment section 
steps 3 and 4 only to determine if knives need 
to be set. Do not complete the entire 
outfeed table adjustment. If knives need to 
be set, proceed to the Setting Cutterhead 
Knives section. 

To position the knives for rabbet cuts, take a shop 
scale with 1/32” graduations and place it against 
the end of the cutterhead. Slide the knife out until it 
is at the 1/32” mark on the scale; that is, the knife 
will now be 1/32” beyond the edge of the 
cutterhead. The gib should remain in normal 
position, even with the edge of the cutterhead. 
(Figure 30). This adjustment will ensure that the 
knife clears the end of the gib and cutterhead, and 
has good contact with the workpiece. (See the 
Rabbeting section for further information.) 

Note: This will also correct for small nicks without 
requiring replacement of blades.