Powermatic Model 60HH 8 inch jointer unintended spring cut

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Forum topic by BuilderJosh posted 12-03-2018 02:46 PM 1147 views 0 times favorited 3 replies Add to Favorites Watch
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1 post in 586 days

12-03-2018 02:46 PM

Topic tags/keywords: jointer powermatic milling

I have a new Powermatic Model 60HH jointer and no matter how I adjust the tables I end up with a spring cut, or a concave along the length of the piece. I’m reasonably certain the tables are coplaner. I have the outfeed table set a hair below the highest point of the blades so that a straight edge is barely picked up and moved toward the infeed table when I manually rotate the cutterhead. It travels maybe 1/8 of an inch. Any lower and the work piece will hit the outfeed table instead of feeding onto it. The only thing I can think is that the end of the outfeed table is lower than the rest of it. Any ideas or help would be greatly appreciated.

3 replies so far

View jutsFL's profile


198 posts in 618 days

#1 posted 12-03-2018 02:59 PM

I never understood that logic for the jointer… I set my knives at precisely the same height as the outfeed table.

Its rather unlikely that the tables wouldnt be on plane. Id set the knives at the outfeed height and give it a shot.

-- I've quickly learned that being a woodworker isn't about making flawless work, rather it's fixing all the mistakes you made so that it appears flawless to others! Jay - FL

View Kazooman's profile


1492 posts in 2729 days

#2 posted 12-03-2018 03:32 PM

Check again that the planes of the infeed and outfeed tables are parallel to each other. (As an aside, everyone says coplaner which means being in the same plane. That would only occur if the tables are at the same height and they are not when the jointer is in use). Pay attention to your technique. As the workpiece is passed over the jointer you need to keep the recently jointed edge flat on the outfeed table. With a long piece of stock the weight of the amount hanging over the end of the infeed table tends to tilt the leading edge up and then near the end of the cut the opposite happens as the weight of the stock tilts the trailing edge up. That can result in just what you are seeing. A longer bedded jointer would be great, but barring that, infeed and outfeed support rollers can help, but they are very hard to get set up just right.

View GR8HUNTER's profile


7575 posts in 1489 days

#3 posted 12-03-2018 03:43 PM

just as Kaz saying ^^^^^^^^^^^^^^ technique seems to be your problem :<((

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

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