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Jointer knives - types of steel and which ones are better?

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Forum topic by EricTy posted 610 days ago 1664 views 0 times favorited 10 replies Add to Favorites Watch
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EricTy

60 posts in 846 days


610 days ago

Topic tags/keywords: jointer knives materials steel

So,

I gave my knives to a life-long sharpening service and they are not straight. I also found out one of them is significantly shorter than the other two so not sure if there is any vibration being created (Grizzly G1182 Jointer). Knives are 6” x 1” x 1/8” thick.

I’m now researching replacement jointer knives so I can start fresh. Seems the type of steels vary quite a bit.

AISI 03 (“German tool steel” from Hartville tool) $33
http://www.hartvilletool.com/product/582/jointer-knives

Carbide Tipped (“hi-grade micro-grain carbide” from Hartville tool) $112
http://www.hartvilletool.com/product/569/planer-knives

M2 (Grizzly) $41
http://www.grizzly.com/catalog/2012/Main/67

T1 HSS (18% Tungsten from Holbren) $21
http://www.holbren.com/jointer-planer-knives/

As you can see, there’s quite the material selection and varying prices. Any thoughts on superiority and experience? Or maybe something not even listed here?

Thanks everyone.

-- Only you know the mistakes were intentional...


10 replies so far

View MedicKen's profile

MedicKen

1599 posts in 2058 days


#1 posted 610 days ago

Call Bobby at http://www.woodworkerstoolworks.com/. He will have exactly what you need at a good price

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com

View teejk's profile

teejk

1206 posts in 1280 days


#2 posted 610 days ago

medic…have you bought from there? I actually met him a few months ago (his business is only about 30 miles from here “as the crow flies” but he is tucked so far into the middle of nowhere that I think it was a lot further than that).

View rlrobinhood's profile

rlrobinhood

78 posts in 1242 days


#3 posted 610 days ago

I’d highly reccomend American National Knife. I’ve done business with them several times and they are both very knowledgable and reasonable in price. Here is there webpage. http://www.americannationalknife.com/

I learned about them from others on this site.

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EricTy

60 posts in 846 days


#4 posted 610 days ago

I get that carbide tipped isn’t as good for soft woods as they are for hard woods due to the fact it is difficult to get that premier edge on carbide as compared to tool steel (hence it would “tear” more than “cut” the soft woods).

But they would last longer and it’s not like I’m a production shop either. The tool steel would be easier to dress when they dull slightly but carbide can be dressed as well, it just takes longer and with more specialized equipment. At the same time, diamond sharpening stones are now commonly available so that makes that task easier.

I think I’m talking myself into spending the extra $80 or so for the carbide tipped unless there’s a really good argument as to why I shouldn’t bother.

Can someone talk me out of it?

-- Only you know the mistakes were intentional...

View Wdwerker's profile

Wdwerker

331 posts in 829 days


#5 posted 609 days ago

As long as your sharpener can handle the carbide knives.
I have a Tormek wet wheel sharpener in my shop. Many years ago I spent the $$$ for the planer knife jig. It takes some time but I can put an incredibly sharp edge on my jointer and planer knives ( HSS ) After sharpening they leave a surface so smooth it has a sheen to it.
The carbide will stay sharp much longer than the steel knives, especially if you keep them clean and occasionally use a diamond hone.

-- Fine Custom Woodwork since 1978

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teejk

1206 posts in 1280 days


#6 posted 609 days ago

I have the Tormek without the planer knife jig…for the $160 it would cost to buy the jig, think I’ll send mine out. I got most of the other stuff (stone dresser, small and large knife jigs) with the machine.

View Jasoninsacramento's profile

Jasoninsacramento

45 posts in 747 days


#7 posted 599 days ago

I’m also looking to replace my blades in the G1182. So no one really answered the question about the types of steel and your original links (other than the carbide…thanks EricTy & Wdwerker…advice on that, folks?

View EricTy's profile

EricTy

60 posts in 846 days


#8 posted 599 days ago

I ended up buying a set of carbide tipped from http://www.woodworkersoutpost.com/. They were about half the price of the other carbide tipped knives from various places recommended. Made in Taiwan. Don’t remember the carbide grade (C4 perhaps) but when I did a little research, I was satisfied.

I have yet to install and try them out. Today sounds like a good day to play.

I’ll send my tool steel ones out to have them sharpened so they are straight this time and I’ll keep them as a backup set.

-- Only you know the mistakes were intentional...

View PurpLev's profile

PurpLev

8476 posts in 2244 days


#9 posted 598 days ago

to answer the original post/question:

tool steel: high carbon steel – usually O1 or A2 when referring to woodworking iron, best used for hand tools, does not stand up to heat (power tool usage) as well as HSS and carbide

HSS: High Speed Steel – cutting steel that can withstand high heat generated from high speeds of tools (drill bits, planer knives, blades, etc), better fit for power tools than tool-steel

M2 / T1 /etc: these are variations of HSS with added alloys in the steel mix to make them resist and stand up to heat even better than ‘pure’ HSS. these are usually a better choice over regular HSS for power tools that run high RPMs

Carbide: the toughest matel currently known. withstand much higher heat than HSS, and doesn’t degrade as fast as HSS. best used when longevity is required (high production settings). doesn’t take as keen of an edge as HSS can, so finishing cuts using Carbide are not as good as it would be with HSS cuts. usually used for rough work. can take deeper cuts and faster RPMs than HSS.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View JesseTutt's profile

JesseTutt

795 posts in 706 days


#10 posted 598 days ago

Speaking of Carbide, is C4 carbide better than C2?

-- Jesse, Saint Louis, Missouri

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