LumberJocks

All Replies on Jointer knife question...(Updated)

  • Advertise with us
View dakremer's profile

Jointer knife question...(Updated)

by dakremer
posted 12-16-2012 08:13 PM


33 replies so far

View Dusty56's profile

Dusty56

11822 posts in 3837 days


#1 posted 12-16-2012 08:20 PM

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

20949 posts in 2953 days


#2 posted 12-16-2012 08:36 PM

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. Keep your dust collector fed. Kentuk55@yahoo.com

View Grandpa's profile

Grandpa

3261 posts in 2825 days


#3 posted 12-16-2012 08:45 PM

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

View dakremer's profile

dakremer

2730 posts in 3241 days


#4 posted 12-16-2012 08:45 PM

A lot taller. Like 1/4”

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

View Grandpa's profile

Grandpa

3261 posts in 2825 days


#5 posted 12-16-2012 08:47 PM

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

View dakremer's profile

dakremer

2730 posts in 3241 days


#6 posted 12-16-2012 08:47 PM

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

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

View dakremer's profile

dakremer

2730 posts in 3241 days


#7 posted 12-16-2012 08:52 PM

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!!!!

View Grandpa's profile

Grandpa

3261 posts in 2825 days


#8 posted 12-16-2012 08:56 PM

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

View dakremer's profile

dakremer

2730 posts in 3241 days


#9 posted 12-16-2012 08:59 PM

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

1215 posts in 2834 days


#10 posted 12-16-2012 09:24 PM

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.

View dakremer's profile

dakremer

2730 posts in 3241 days


#11 posted 12-16-2012 09:29 PM

The brand is a Sunhill

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

View Jim Jakosh's profile

Jim Jakosh

21332 posts in 3255 days


#12 posted 12-16-2012 11:20 PM

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!!

View dakremer's profile

dakremer

2730 posts in 3241 days


#13 posted 12-16-2012 11:27 PM

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

303 posts in 2566 days


#14 posted 12-16-2012 11:41 PM

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 a world where a duck can cross the road and no one asks why.

View dakremer's profile

dakremer

2730 posts in 3241 days


#15 posted 12-16-2012 11:51 PM

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!!!!

View teejk's profile

teejk

1215 posts in 2834 days


#16 posted 12-16-2012 11:57 PM

been awhile since I changed jointer knives (I don’t use it much anymore) but as I recall, the screws that you “swear at” (and might have to drill/grind out) clamp the knife in place after you have raised/lowered the knife with the allen screws that control those little elevator things in there.

if you can lower them enough to clear the outfeed table and not strike anything, consider it a plus (more “meat” to be sharpened in the future).

as always, just IMHO.

View dakremer's profile

dakremer

2730 posts in 3241 days


#17 posted 12-17-2012 12:03 AM

do you happen to know the bolt size?

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

View runswithscissors's profile

runswithscissors

2846 posts in 2174 days


#18 posted 12-17-2012 12:50 AM

If your jointer uses jack screws to adjust knife height, check to see they are screwed all the way in. Also would depend on the adjustment range on your outfeed table. If it can’t be set level with the knives, they won’t work.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View 404 - Not Found's profile

404 - Not Found

2544 posts in 3118 days


#19 posted 12-17-2012 12:58 AM

How did you get the threads out of the cutter block after you cut the heads off the bolts?

View dakremer's profile

dakremer

2730 posts in 3241 days


#20 posted 12-17-2012 02:18 AM

I cut the distal end of the screw cap off – so I could get it out. There was enough of the cap left that I could still get it with the other end of the wrench, or a vise grip

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

View dakremer's profile

dakremer

2730 posts in 3241 days


#21 posted 12-17-2012 02:33 AM

I found out the bolts are 1/4-28 by 1/4” long…..might have to order these…none of the big box stores have them…

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

View PRGDesigns's profile

PRGDesigns

238 posts in 2463 days


#22 posted 12-17-2012 02:44 AM

Try K & K Hardware in Bettendorf in the morning.

-- They call me Mr. Silly

View dakremer's profile

dakremer

2730 posts in 3241 days


#23 posted 12-17-2012 02:45 AM

Yeah thats usually my go-to place…but I’m living in Iowa City now…

I havent found a good place around here yet. maybe Ace?

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

View Dusty56's profile

Dusty56

11822 posts in 3837 days


#24 posted 12-17-2012 02:47 AM

I was going to recommend ACE , but didn’t know if you had one in your area. My local store has tons of odd ball stuff : )

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

View runswithscissors's profile

runswithscissors

2846 posts in 2174 days


#25 posted 12-17-2012 03:49 AM

I’d suggest hardened steel for those bolts. Not sure about grade. . . 5? 8? Much tougher than ordinary fastenings.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View Straightbowed's profile

Straightbowed

717 posts in 2447 days


#26 posted 12-17-2012 03:52 AM

YEP YOUR KNIVES COULD JUST BE WORN FROM SHARPENING 20X THEY SHOULD BE OK CHECK YOUR JACK SCREW AND MAKE SURE ITS ALL THE WAY DOWN THEY SHOULD WORK

-- Stevo, work in tha city woodshop in the country

View dakremer's profile

dakremer

2730 posts in 3241 days


#27 posted 12-17-2012 04:04 AM

What is a jack screw??

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

View ksSlim's profile

ksSlim

1286 posts in 3039 days


#28 posted 12-17-2012 04:07 AM

Dak, do you have a Fastenal supplier in your area?
Down South in the air capital, they have supplies for 5 and 8 grade hardware.
Worth a look.

-- Sawdust and shavings are therapeutic

View dakremer's profile

dakremer

2730 posts in 3241 days


#29 posted 12-17-2012 04:22 AM

Yes, I do have one of those! I just googled it! I will try there tomorrow!

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

View runswithscissors's profile

runswithscissors

2846 posts in 2174 days


#30 posted 12-17-2012 07:32 AM

Jack screws: I’ve seem them on both jointers and planers. They are a flat head machine screw placed in the bottom of the knife slot. You back them in or out to adjust knife depth. In some ways nicer than springs because you don’t have to fight spring pressure while adjusting the knife while tightening the lockdown bolts, using all 3 of your hands.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View Straightbowed's profile

Straightbowed

717 posts in 2447 days


#31 posted 12-17-2012 06:13 PM

jack screws are shaped like a wak the blade rest on them and you adjust the blade with the jacking screw if your blades have been sharpened numerous times the jack screw is out of play but if your blades are short you better watch out cause your retainer will not grip the blade fully and you could come up missin a arm just sayin

-- Stevo, work in tha city woodshop in the country

View Straightbowed's profile

Straightbowed

717 posts in 2447 days


#32 posted 12-17-2012 06:17 PM

watch the finewoodworking series on planer blade installation and adjustment it goes in depth on these machines it has one of it’s editors from awhile back doin the show its very good or watch the woodwhisperer he gives some great info or just ask the lumberjocks lots of good info from the more seasoned woodworkers

-- Stevo, work in tha city woodshop in the country

View dakremer's profile

dakremer

2730 posts in 3241 days


#33 posted 12-17-2012 06:33 PM

Ill have to find/watch those! Thanks

My machine doesn’t have jack screws. Just the springs.

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

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com