Jet Tools JJ-6CSX operating instructions Setting Cutterhead Knives JJ-6CSDX

Setting Cutterhead Knives (JJ-6CSDX)

Note: Before setting knives for model JJ-6CSDX Jointer, the Outfeed Table Adjustment should be done to ensure the proper knife height in relation to the outfeed table.

Knives for the JJ-6CSDX cutterhead are adjusted by means of a cam. It is important to note that the entire adjustment is accomplished within one complete rotation (360 degrees) of the cam. A full rotation of the cam will cause the knife blade to move a total of .015” from one extreme to the other. Turning the cam more than one full rotation will not further adjust the knife setting, but will simply begin the adjustment all over again. The knife adjustment procedure is outlined below.

Cutterhead knives are dangerously sharp! Use extreme caution when inspecting, removing, sharpening or replacing knives into the cutterhead. Failure to comply may cause serious injury!

To adjust (refer to Figures 27 & 28):

1.Disconnect jointer from power source.

2.Carefully number each blade with a marker to make them easier to differentiate.

3.Place a straightedge across the outfeed table extending it over the cutterhead towards one end of the knife.

Cutterhead knives are dangerously sharp. Do not grab the cutterhead itself to rotate it! Failure to comply may cause serious injury.

4.Rotate the cutterhead back and forth using the drive belt or pulley, until knife number one is at its highest point. The apex of the knife should just barely come in contact with the straightedge.

5.Move the straightedge towards the other end of the knife and repeat step 4.

The apex of the knife at both ends of the knife must just make contact with the straightedge. If the apex of the knife comes below the straightedge (a gap exists) or pushes the straightedge up, proceed to the next step.

6.Using a 4mm hex wrench, slightly loosen the four gib screws.

7.Using a 3mm hex wrench, loosen the cam locking screws to permit adjustment of the cam (described in the next step).

Important: Always keep the cam locking screws snug enough so that the cam can’t

Figure 27

Figure 28

rotate freely. This is especially important for when the cam is rotated counterclockwise since this action will cause the cam locking screw to loosen further.

8.Using an 8mm hex wrench, adjust the cam. This is a very sensitive adjustment. Start by rotating the cam in a clockwise direction just a few degrees.

9.Next, keep the cutterhead steady by firmly holding on to the pulley, place a piece of wood pressed against the knife’s edge and press to properly seat the blade.

10.Check your progress by repeating steps 4 and 5. If the knife becomes more out of adjustment, turn the cam in the other direction.

11.The adjustment is almost complete when the requirements described in Steps 4 and 5 are met.

12.Next, while pressing the knife firmly against the cam, snug the two inside gib screws that hold the gib and knife in place. Verify that the knife is still in adjustment (steps 4 and 5).

13.Tighten the two outside gib screws, then the two inside gib screws. Verify that the knife is still in adjustment (steps 4 and 5).

14.Tighten the gib lock screws.

15.Repeat this entire procedure for the remaining two knives.

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