Indexable Carbide Inserts for Grizzly Jointers

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Forum topic by HorizontalMike posted 10-12-2013 04:30 PM 1849 views 0 times favorited 7 replies Add to Favorites Watch
View HorizontalMike's profile


7770 posts in 3113 days

10-12-2013 04:30 PM

Topic tags/keywords: helical cutter head indexable carbide jointer

I have had my 8in G0593 for over three years now. I picked it up used locally and the original owner had “gone through” one side of the four-sided indexable Carbide cutters. I used the existing “second side” cutter surface (rotated 90 degrees CW) for ~2yr and then rotated the cutters CW to the third side (remember that these are “indexable). I took my time and and set my torque wrench accordingly.

What I found out was a bit puzzling, so I went through all 40 cutters once again, re-seating them and torquing properly. The results, while MINOR, were noticeable. I began having very slight raised lines where the cutters did not quite overlap or index correctly.

Has anyone else noted this when rotating their carbide cutters?

I suspect, but do NOT know for a fact, that the carbide cutters have worn and are no longer exactly 14mm in width.

Why else would I be getting very slight lines (plural) on my jointed surfaces?

Should I be rotating the carbide cutters more frequently? I have not seen this addressed on the forums and since these helical cutter heads have been out for some time, I would think others may have noticed this issue. Anyone else observed this?

-- HorizontalMike -- "Woodpeckers understand..."

7 replies so far

View madts's profile


1873 posts in 2538 days

#1 posted 10-12-2013 05:16 PM

Maybe the former owner went through more than just one side. Sounds like he went through 3 side when you bought the machine.

-- Thor and Odin are still the greatest of Gods.

View Fred Hargis's profile

Fred Hargis

5173 posts in 2692 days

#2 posted 10-12-2013 05:54 PM

I’ve read several posts from folks who have that problem, and I do as well (on my jointer). Mine has a Byrd head, and I bought it new. In fact, Wood magazine doesn’t recommend them because of the lines they leave. I went through the same procedure (remove/clean/reseat/torque) and on the jointer it didn’t make any difference. I haven’t rotated my cutters yet, and I’ve had the head for probably 3 years. I’ve had the one on my planer for about 6 years, haven’t rotated the cutters yet, but do not have that problem. It did at first, but the cleaning procedure seemed to solve it. So, IMHO, I wouldn’t rotate them more often; you may be correct about the width (easily checked with a mic) but the idea behind these is the long cutting life. In my case, the lines can be sanded out so quickly I don’t fret to much over them, and if the piece goes through the I don’t have to sand. I think what causes it that one (or more) edge is ever so slightly higher than the others, and I’m guessing that could be caused by a variation in the width…..but I doubt you had anything to do with that width being different. One thing you could try is rotating your cutters (not the edge, the position). Moving the inboard ones to the outboard edge of the head. If it’s the cutters, the line should shift a little.

-- Our village hasn't lost it's idiot, he was elected to congress.

View SCOTSMAN's profile


5849 posts in 3784 days

#3 posted 10-12-2013 06:47 PM

Could it be crud on the cutter clean and try again even a spot of dust will affect it’s useage. Alistair

-- excuse my typing as I have a form of parkinsons disease

View HorizontalMike's profile


7770 posts in 3113 days

#4 posted 10-12-2013 07:14 PM

I might try swapping the inside cutters for the outside, since the inside cutters get much more use all of the time… narrow boards, edges of 8/4 12/4 etc… Like I said in the OP, a minor inconvenience but it did take the razzle dazzle out of having a spherical cutter head for awhile. That is until my 3-blade planer developed 3-4 notches in the blades, from planing pine no less.

I guess final sanding is always in order…

-- HorizontalMike -- "Woodpeckers understand..."

View Fred Hargis's profile

Fred Hargis

5173 posts in 2692 days

#5 posted 10-12-2013 08:37 PM

That was my logic when I did it, the more wear on the inner cutters. It’s pretty hard to gauge whether the lines moved (at least it was for me). I ran an 8” board through the jointer before I switched the cutters around. Then I cut about 10” off the leading end. After I switched them around, Iran it through again, and then butted the cutoff up against the re-faced board. My lines did so some differences, but they were pretty minor.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Shawn Masterson's profile

Shawn Masterson

1325 posts in 2147 days

#6 posted 10-12-2013 10:19 PM

“3-blade planer developed 3-4 notches ”
The easiest fix for that is to slide one knife left and one right. That way the nicks won’t show.

View HorizontalMike's profile


7770 posts in 3113 days

#7 posted 10-13-2013 12:19 AM

Yep, I have tried sliding the blades in opposite directions but to no avail. Funny thing is that I never had this kind of problem when planing Ash and Maple, but when I started planing soft resinous pine, the issue popped up. Maybe it is the resin that picks up the sandy grit that causes this, as that would make sense.

BTW, I have replacements, plus the other side of the current set of blades, just been a bit lazy and reluctant to swap them out just yet, aka so soon. Mostly just clean up with the 1/4-sheet sander, though I did miss a couple lines on my last project, a 6-board chest lid.

Extra layers of milk paint saved the day, at least until the cat puked on it this past week and peeled the paint. Actually I think this is a result of using the “commercial” milk paint. I am convinced that that company just uses powdered milk to make their milk paint WITHOUT going through the curdling process, a necessary step in making the paint more stable and stronger binding. My DIY batches of milk paint have NOT had that kind of issue, and yes I have had some cat drool on these other batches without effect. Interesting paint lesson learned, for sure…

-- HorizontalMike -- "Woodpeckers understand..."

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