Figure 6-10.To reduce splintering, (A) make one pass to about this point; then (B) turn the stock end-for-edn and make a second pass until it meets the first one which, here, is indicated by the arrow. Note: The guard is removed and the depth of cut is exaggerated for clarity.
End grain jointing is always difficult because you're jointing at the worst possible angle to the grain. For most projects, end jointing is not even necessary. But when you need to do it, follow these steps:
Take very light cuts (1/32" or less) and feed the work as slowly as is practical. Check to be sure the jointer knives are sharp or they may burn the end grain during the cut. Joint the ends before jointing the edges so that any minor splintering will be removed. Splintering can also be reduced by jointing about 2" in from one side, then reversing the piece to complete the cut (Figure 6-10). You may also want to score the wood fibers at the very end of the cut with a chisel or utility knife before jointing.