Knife Inspection
The G1033 20" Planer comes equipped with a 4- knife cutterhead. The knives must be periodically replaced or adjusted. Adjustments should be as precise as possible with tolerances within ±.001'' to prolong the sharpness of the knife edges. Improperly adjusted knives can unbalance the cutterhead and shorten bearing life, as well as produce substandard planing results. The knives are set at the factory before shipping, but now is a good time to
1.Remove the upper cover to expose the top of the cutterhead.
2.Carefully turn the cutterhead (using the pul- ley) until the first knife is top dead center.
3.Using the knife adjusting jig, check the knife height. The jig should sit solidly with both feet on the cutterhead. See Figure 13. If the knife is adjusted properly, the contact point at the center of each adjuster should just touch the tip of the knife. If the knife does not make contact, or if the knife caus- es the adjusterÕs legs to not seat on the cut- terhead, the knives need to be adjusted.
Figure 13. Knife height adjustment.
G1033 20" Planer
Knife Adjustment
The knives are locked into the cutterhead with wedge type gibs and gib bolts. Springs under the knives give an upward pressure to help in the set- ting process. To
1.Loosen the gib bolts until the knife is forced upward by the springs. The gib bolts turn clockwise to loosen and counterclockwise to tighten (when facing the head of the bolt). See Figure 14.
2.Place the adjusters on the cutterhead as described above, so the feet are securely planted on the cutterhead. Make sure the adjuster extension rod is parallel to the cut- terhead, so both ends of the knife receive equal pressure from the adjuster.
3.The downward pressure provided by the adjuster will set the knives at a uniform pro- trusion of approximately .070" above the cutter. The knife height should vary no more than .001" across the length of the cutterhead.
4.Maintain a constant pressure on the adjuster while
5.Repeat the same procedure on the remain- ing knives. As mentioned before, the stan- dard adjuster is satisfactory for reasonably accurate knife setting tasks.
Loosen |
Tighten |