6.Inspect the cutting edge of the knives for nicks or wire edge. Hone the knives slightly using a stone or if the knives are to be sharpened, maintain a cutting angle of 35 degrees.
7.Insert springs, knife and gib into slot of cutterhead. Back out screws just enough to hold the knife in the cutterhead.
8.Place knife setting gauge (Figure 19) over knife.
9.While holding down the knife gauge, loosen all six screws by turning them into the gib until the cutting edge of the knife comes in contact with the protrusion of the gauge. Snug up the gib by slightly backing out the six screws against the slot.
NOTE: At this time, only tighten the knife into the slot just enough to hold the knife in position.
10.Replace and
11.After all four knives are set with the screws just snug, back out and tighten the six screws against the slot starting with the end screws first and then the center screws until the knife is securely held in the cutterhead. Tighten the remaining three knives in the same manner.
After replacing and checking knives, check again carefully. Make certain the direction of knives is correct and all 24 gib screws are tightened securely.
Replacing or Rotating Knife Inserts (Model 209HH only)
The knife inserts on the model 15HH are four- sided. When dull, simply remove each insert, rotate it 90° for a fresh edge, and
Use the provided screwdriver with the socket adaptor to remove the knife insert screw. See Figure 20. It is advisable to rotate all inserts at the same time to maintain consistent cutting. However, if one or more knife inserts develops a nick, rotate only those inserts that are affected.
Each knife insert has an etched reference mark so you can keep track of the rotations.
IMPORTANT: When removing or rotating inserts, clean saw dust from the screw, the insert, and the cutterhead platform. Dust accumulation between these elements can prevent the insert from seating properly, and may affect the quality of the cut.
Figure 19 repeated
Figure 20 – Model 209HH only
Before installing each screw, lightly coat the screw threads with machine oil and wipe off any excess.
Securely tighten each screw which holds the knife inserts before operating the planer!
Make sure all knife insert screws are tightened securely. Loose inserts can be propelled at high speed from a rotating cutterhead, causing injury.
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