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Jointer knife question...(Updated)

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Forum topic by dakremer posted 573 days ago 967 views 0 times favorited 33 replies Add to Favorites Watch
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dakremer

2421 posts in 1677 days


573 days ago

I just bought new knives for my jointer, and realized they are not a match to the old ones. The new knives are taller than the knives that come with it. My question is, how far can the knives stick out above the slot in the drum? I already have my old knives out – they are nicked up and need sharpened. I need to use my jointer today. Obvioiusly I can get the old knives sharpened (and thats what I’m going to do) – but can I use the new knives???

Thanks in advance

Here are some pics of one of the knives out….

There are springs on the bottom – I dont see a really great way of fine adjusting the knives. So whats the method for this? I did notice that the knives were not bottomed out to the bottom of the slot…are they not supposed to be??

-- Hey you dang woodchucks, quit chucking my wood!!!!


33 replies so far

View Dusty56's profile

Dusty56

11638 posts in 2274 days


#1 posted 573 days ago

If you install just one of the taller knives , then make sure it doesn’t hit anything when you set the tables to the correct height and turn the head slowly by hand.
That was a problem that I recently had with my replacement knives…....back to the supplier they went.

-- I'm absolutely positive that I couldn't be more uncertain!

View Roger's profile

Roger

13976 posts in 1390 days


#2 posted 573 days ago

How much taller? an 1/8, 1/16, 1/32??? Maybe yours were that tall when the jointer was new…? If they are considerably taller, then, the return shouldn’t be a problem. I do feel your pain tho. Especially bein excited to get that beast runnin.

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

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Grandpa

3034 posts in 1261 days


#3 posted 573 days ago

Install below the outfeed table. They shouldn’t flex that much. If you can get the table above them you should be okay.

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dakremer

2421 posts in 1677 days


#4 posted 573 days ago

A lot taller. Like 1/4”

-- Hey you dang woodchucks, quit chucking my wood!!!!

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Grandpa

3034 posts in 1261 days


#5 posted 573 days ago

That much might have been ground off but I doubt it. How did you finally get the bolts out??

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dakremer

2421 posts in 1677 days


#6 posted 573 days ago

It will stick above the slot in the drum by a little over 1-4”....

-- Hey you dang woodchucks, quit chucking my wood!!!!

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dakremer

2421 posts in 1677 days


#7 posted 573 days ago

I had to cut them. Heating them didn’t work because they were so rounded over I couldn’t get even a good wrench to not strip them….

-- Hey you dang woodchucks, quit chucking my wood!!!!

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Grandpa

3034 posts in 1261 days


#8 posted 573 days ago

Well do they fit below the table and not strike anything?? What is the decision here?

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dakremer

2421 posts in 1677 days


#9 posted 573 days ago

I haven’t put them in yet. Will find out soon. Just was wonder if its dangerous to have the knife sticking out farther from the slot than normal

-- Hey you dang woodchucks, quit chucking my wood!!!!

View teejk's profile

teejk

1205 posts in 1270 days


#10 posted 573 days ago

just an observation…most jointers allow for depth adjustment and unlike the portable planers, the knives can be sharpened. is it possible your old knives have been sharpened such that they are narrower?

you don’t mention the brand or model but I’m sure the specs for the machine are available.

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dakremer

2421 posts in 1677 days


#11 posted 573 days ago

The brand is a Sunhill

-- Hey you dang woodchucks, quit chucking my wood!!!!

View Jim Jakosh's profile

Jim Jakosh

10965 posts in 1691 days


#12 posted 573 days ago

I don’t know that there is a problem of them sticking out too far past the drum unless they hit something- like the edge of the tables in the process. It might be that the table cannot clear the cutter with wider knives. I guess the best thing to do it to install them and turn the drum by hand to see if there is interference anywhere.
Were these what was specified for that model jointer or are them some kind of universal set?
............Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

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dakremer

2421 posts in 1677 days


#13 posted 573 days ago

They are a universal set….

I’m trying to find the manual for my jointer now…

-- Hey you dang woodchucks, quit chucking my wood!!!!

View MNgary's profile

MNgary

234 posts in 1003 days


#14 posted 573 days ago

Building on teejk’s entry, They may be taller, but whhen you lower the depth adjustments in the head it may be they won’t protrude that much more than the old ones.

-- I dream of the world where a duck can cross the road and no one asks why.

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dakremer

2421 posts in 1677 days


#15 posted 573 days ago

I can’t find the manual online for it – does anyone know the bolt size for the knives in the drum

obviously the easy thing to do would be take an old bolt to the store with me…..however the shop is in one direction and the store is in the other….

Does anyone know the size???

-- Hey you dang woodchucks, quit chucking my wood!!!!

showing 1 through 15 of 33 replies

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