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Jointer knives catching cast iron casing

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Forum topic by BoomerBuilt posted 12-29-2020 08:19 AM 523 views 0 times favorited 14 replies Add to Favorites Watch
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BoomerBuilt

27 posts in 784 days


12-29-2020 08:19 AM

Topic tags/keywords: jointer knives advice

Hi there, my wording might be poor but I will try my best. I have some old 6” Forster? Jointer. It’s basically a 90’s? Beaver Rockwell type deal. I bought it used, so of course it doesn’t cut properly. I have figured out the blades were obviously badly sharpened, and were so out of strait. So I bought some new ones. The new ones are a thicker blade though. Not nearly as flimsy as what I took out. However no matter how low I set the knives (so they still catch the ruler and move it…. the way many seem to check they knives adjustment online), the knives catch on the jointer. As soon as I have the blade set and tightened down, and spin it to work on the next knife, I realize it catches on the undercarriage underneath and I can’t spin it. Has anybody taken off their infeed table to grind the cast iron a bit lower in that spot? The only store that carries knives in my town, only sells those one. Also I spend $45 so I’m trying not to lose that money. Any other thoughts? Thanks. This whole used machines racket I do all the time is getting to be a bit much. Ha! I feel there has been so much wasted money.

-- You never know what you don’t know.


14 replies so far

View Clarkie's profile

Clarkie

515 posts in 3081 days


#1 posted 12-29-2020 11:48 AM

Hello Boomer, sounds like you’ll have to do more homework on your machine. There is a lot of help at the Old Woodworking Machines site: http://vintagemachinery.org/ I have built my entire shop from scratch over the years, so I know the pain of the mistakes made. Try not to jury rig the knives, look for the proper size and stay safe. At that site you’ll find plenty of answers if you are willing to seek. Have fun, make some sawdust, Clarkie.

View Fred Hargis's profile

Fred Hargis

7228 posts in 3733 days


#2 posted 12-29-2020 01:31 PM

I can’t help but wonder. Knives are usually set to the height of the outfeed table; is your outfeed too high, and if yes, can it be lowered a little? Then you could lower the knives.

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

View controlfreak's profile (online now)

controlfreak

2877 posts in 841 days


#3 posted 12-29-2020 02:01 PM

“However no matter how low I set the knives (so they still catch the ruler and move it”

I don’t think lowering the outfeed is going to work. I am suspicious of “the new knives are thicker”. I don’t think the shape or size of the knives should change from what was in the joiner assuming someone else hasn’t already switched from the original size.

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BoomerBuilt

27 posts in 784 days


#4 posted 12-29-2020 02:21 PM

Thanks Clarkie. I hope I don’t have a vintage machine. That’s definitely not what I am going for. Haha. But a great site none the less.

Fred Hargis. I lowered my outfeed table originally so I could try and use some ‘planer pals’ (little magnetic pieces for setting planer knives) I had on hand. Well they didn’t work. But I wouldn’t be able to lower my outfeed any more, because the back of the knives beveled edge would be far lower than the jointers cutter head drum (?). Maybe that’s ok but I would assume that the back side of the cut should be higher that the drum and not lower, maybe I should try for a photo, I’m a bit confusing.

Control freak, yes I’m scared of the same thing. I’m gonna poke around on that vintage site, I really don’t understand so far why an 1/8” is messing me up so bad. How are the tolerances this close. I’m doomed.

-- You never know what you don’t know.

View Robert's profile

Robert

4730 posts in 2721 days


#5 posted 12-29-2020 02:26 PM

Sounds like they aren’t dropping deep enough into the slot.

-- Everything is a prototype thats why its one of a kind!!

View CaptainKlutz's profile

CaptainKlutz

4888 posts in 2734 days


#6 posted 12-29-2020 03:13 PM

First: What size were the old blades that worked? LxWXH
Sounds like you bought wrong knives?

The Taiwan made 6” machines actually used different size knives. They range in length from 6”, 6-1/16, 6-1/8, and 6-3/16”. They come in 5/8, 11/16, 3/4, 13/16, 7/8, and 1” heights. Most are 1/8” thick, but a couple where sold with 1/16” thick knives.

Can easily find the right size for your machine from any of these folks:
https://www.oellasawandtool.com/
https://www.holbren.com/jointer-planer-knives/
https://americannationalknife.com/2To7.asp

Second: Believe you meant to type 6” FOREMOST Jointer?

Foremost is the brand name for Taiwan based exporter of hard goods from ~1960-1990. Foremost name is derived from Republic of Formosa that was located on island now called Taiwan in ~1890-1900. :-)

Looking at your old posts; I find this image of your jointer:

The hand wheels extending out from the front of machine and the fence being mounted to only one end, are unique features that will make it easier to find proper clone tool manual, and proper replacement parts (like knives).
That style jointer was imported by Jet in 60-70’s as JJ-6CS, but many had a center mounted fence. Harbor Freight and Busy Bee also imported/sold that style jointer. Those front mounted hand wheels where less popular as they were easy to bump while using the jointer, so you don’t see them sold today.

Since you are located in Canada, you will probably find Busy Bee tools as your best parts source for Taiwan made tools? It is owned by relative of owner for Grizzly and imports/sells the same tools as Grizzly.

PS – Vintage machinery only supports US/EU made tools. They will have nothing on your jointer, except information on Rockwell/Delta model that was used as model for your cloned tool. ;-)

Best Luck.

-- If it wasn't for bad luck, I wouldn't have no luck at all, Doom, despair, agony on me… - Albert King - Born Under a Bad Sign released 1967

View CaptainKlutz's profile

CaptainKlutz

4888 posts in 2734 days


#7 posted 12-29-2020 03:14 PM

Sounds like they aren t dropping deep enough into the slot. – Robert
+1 do you have jack screws under the blade for setting height? Look in bottom of slot with blade removed for small set screws.

Cheers!

-- If it wasn't for bad luck, I wouldn't have no luck at all, Doom, despair, agony on me… - Albert King - Born Under a Bad Sign released 1967

View Kudzupatch's profile

Kudzupatch

297 posts in 2449 days


#8 posted 12-29-2020 04:07 PM


First: What size were the old blades that worked? LxWXH
Sounds like you bought wrong knives?
- CaptainKlutz

I am with the Captain on this. That was my first thought.

You said they were not the same size and since you didn’t have the problem before (I assume) logic says you created the problem with the new blades being larger. You should find the same size that was in there, you know they worked.

I have not bought any blades in a long time, I resharpen my own, but I know there are places on line that will have replacements and if not there are those can make any size you want.

-- Jeff Horton * Kudzu Craft skin boats* www.kudzucraft.com

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Kudzupatch

297 posts in 2449 days


#9 posted 12-29-2020 04:08 PM



Hello Boomer, sounds like you ll have to do more homework on your machine. There is a lot of help at the Old Woodworking Machines site: http://vintagemachinery.org/

If it is an import, they will remove the post. They don’t do imports, even old ones. Read the rules carefully, they enforce them strictly.

-- Jeff Horton * Kudzu Craft skin boats* www.kudzucraft.com

View BoomerBuilt's profile

BoomerBuilt

27 posts in 784 days


#10 posted 12-30-2020 04:20 AM

What I grinded out

The difference in knives. The old ones are NFG. I’m sure you all know what that means.

-- You never know what you don’t know.

View BoomerBuilt's profile

BoomerBuilt

27 posts in 784 days


#11 posted 12-30-2020 04:21 AM

Thanks for the help everybody. I think your right about the depth and needing to go deeper. No jack screws or springs on this one. I have seen those on my planer but nothing here. I was thinking I shouldn’t put the lower beveled part of my knives below the the cutter barrel. But after thinking all night, I don’t think there is a reason not to. Even if there is a small gap on the back end of the knife.
Thanks Captain Klutz for the history of my jointer. It didn’t come with a model number and has been a pain in the ass to find any information on. Finding a blade guard was difficult and the one I found is wound backwards ish but works enough.

This is my first jointer. I have only used somebodies for a couple boards before so it’s all so new and you know… I bought this machine not working…$100 for machine, $45 knives and $35 blade guard assembly. Not sure if I got a deal or not. Lots more elbow grease to come.

Looks like I started plucking off eyebrow hairs. Taking one out, than another, untill you blink and you have barely any eyebrows left. Cause now the jointer is inside my house and i am gonna give it a once over. I want to learn what the jib screws do, and oil and clean what needs to be done.

My solution for the jointer knives ended up being, lower the knives more, and die grind out the cast iron a bit underneath so this isn’t so touchy…. that’s when I took off the cutterhead and realized the bearing in it was not awesome, and that’s when the eyebrow hairs started coming off.

Thanks for all being there. I always say you can’t get a proper answer on Facebook groups. Even if you have 50 answers. So thank you.

-- You never know what you don’t know.

View Aj2's profile

Aj2

4066 posts in 3038 days


#12 posted 12-30-2020 04:31 AM

My guess is your knives are too thick. A 1/8 inch thick knife will a longer bevel.
If you have to set them so low that the heal is below the top of the knife pocket. They are to thick.

-- Aj

View Andybb's profile

Andybb

3329 posts in 1844 days


#13 posted 12-30-2020 04:59 AM

I had EXACTLY the same problem a few months ago with a CL purchase that I refurbished. Same basic machine with a Grizzly tag. I dismantled it to refurbish it and put in new blades. Was totally baffled for a week. Ended up shimming the out feed table and setting the knives just a little lower than specs then promptly sold it. A mystery that thoroughly pissed me off. If you check my member page for threads I started about 2 months ago you’ll find it.

-- Andy - Seattle USA

View BoomerBuilt's profile

BoomerBuilt

27 posts in 784 days


#14 posted 12-30-2020 08:13 PM

Aj2 thanks for the jargon. I really could not articulate those words. Heel of the bevel below the knife pocket says it perfect.

Andybb sorry to hear you went through the same thing. So annoying buying a machine that’s such a mess eh. I’m sure who you bought it off was like my guy and was grinding the knife edge with an angle grinder. So their machine sat for 15 years since it barely worked. Than poof we were there. Haha. I do like purchasing used, but sometimes I get in too deep. I have a beauty Delta DC-380 15” planer that was worth while to refurbish. And I have a Delta cabinet saw with a unifence upgrade that were great purchases. But quality used jointers don’t ever come up. I have been looking for 1.5 years on Kijiji and marketplace and have only once seen something nice but was too slow as it was already online for 4 hours…I’ll go check out your page. Cheers!

-- You never know what you don’t know.

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