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Author Topic: planer knives  (Read 5003 times)

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Offline rutkom

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planer knives
« on: September 22, 2008, 10:14:55 pm »
How long do your planer blade knives last? I have been using a dewalt 733 and only seem to get around 100-200 bf out of them. Is this normal?

 This is on mostly rough oak, walnut, cedar, and cherry. They don't seem to get terribly dull but   get nicks fairly easily. In the past I taken a wetstone and honed them which helped but they still left ridges. I realize that it is important to clean off the lumber, especially with rough sawn. Cedar seems to be the worst about nicking with all the knots.

Recently I bought a 15" delta planer that needs knives. Anyone have a good source of knives or type of blades, HSS, carbide, etc? What kind of steel and grind would be best? Can I expect to get more life out of them vs the Dewalt knives?

Offline scsmith42

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Re: planer knives
« Reply #1 on: September 22, 2008, 10:24:43 pm »
I've heard nothing but positive feedback about DKG coated knives from Moulder Services Inc.

http://www.moulderservices.com/

Scott

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and a mix of log handling heavy equipment.

Offline low_48

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Re: planer knives
« Reply #2 on: September 22, 2008, 10:37:23 pm »
I'd say that is pretty normal wear on those blades. These planers were never designed to do heavy work. They run at very high cutter head speed to get the good surface finish. They are great for a few boards, but I'm sure not as patient as you are. 200 bd ft at a 1/32" per pass? Argh! Now my big 7 1/2 hp Yates American can run all day long taking 3/16" per pass. Sorry, just had to gloat about my $1200 planer.

Offline bck

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Re: planer knives
« Reply #3 on: September 23, 2008, 11:47:03 am »
I usually try and stay away from knotty wood and I get a couple thousand feet  out of mine ( 20") . Knots will mess them up pretty quick.  If you are getting ridges try shifting one knife to the side a little. I have never used carbide knives , wonder how they would hold up to knotty wood ?

Offline rutkom

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Re: planer knives
« Reply #4 on: September 23, 2008, 12:13:07 pm »
Thanks for the link Scott. Any idea on price? Their website doesn't seem to be fully working.

Anyone had any experience with T1 HSS knives from Holbren's. Apparently they are pretty good knives and are much less expensive than the delta knives.

I didn't realize that the knives could be shifted. I am pretty sure on the dewalt there is no way to move them.

Offline scsmith42

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Re: planer knives
« Reply #5 on: September 23, 2008, 01:03:45 pm »
I don't know about price, other than what some friends have stated that they are much better and cheaper in the long run.

MSI's focus is on commercial  machines - they might not have anything for yours... give them a call to see.
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Offline Jason_WI

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Re: planer knives
« Reply #6 on: September 24, 2008, 10:53:45 pm »
http://www.cggschmidt.com/assets/pdf/SchmidtCatalog900.pdf#page=12

These guys might have what you need. I have used there molding knives in the past.
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Offline backwoods sawyer

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Re: planer knives
« Reply #7 on: November 17, 2008, 02:30:17 am »
How long do your planer blade knives last? I have been using a dewalt 733 and only seem to get around 100-200 bf out of them. Is this normal?
I use the same planer.
How many passes are you running each board thru?
Are you running 3 boards or 12 boards?
I ran some Black Oak thru mine the other day and it took eight passes on each board to take off 1/8 on 178 board feet that was 7-10 wide. The knives were not fresh when I started, and are still cutting good enough to leave on for the next project. This planer is not designed for volume but does a good job of finish planing. I am setting up a bell saw planer to do most of the heavy planing and just use this planer to take the last couple passes to give the wood a good finish.
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Offline Ironwood

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Re: planer knives
« Reply #8 on: November 17, 2008, 08:23:37 pm »
I have a big 24" Powermatic 225 planer and it has Esta Disposa blades in it (I just started assembling a grinder to have the option of regular blades). The thin Esta blades dull quickly, as they are very thin (like yours) and my material has lots of bark edges which doesn't help. I have tried the expensive cobalt or tungsten (cant remember) that Esta provides, they were much better, but still not as good as high speed steel sharpened on the machine. Plus the cost is BIG$$$ like 4 times as much for the better blades. If I had to do it again I would have just spent the extra $ on the grinder at the auction, and trained myself to sharpen and adjust the pressure bar and not bought the Esta System. Not to knock them, but thin blades can't hold up well to heavy use.
 
 Ironwood
There is no scarcity of opportunity to make a living at what you love to do, there is only scarcity of resolve to make it happen.- Wayne Dyer

Offline Greenie

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Re: planer knives
« Reply #9 on: November 21, 2008, 10:08:51 am »
We bought 4 24" carbide blades for our Rockwell - what a mistake! They cost a fortune to buy and to sharpen. The carbides nick just as quickly as the steel knives. I'd never buy them again.

Offline Ironwood

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Re: planer knives
« Reply #10 on: November 21, 2008, 08:02:57 pm »
Carbide=brittle, steel will dull but is more forgiving.


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There is no scarcity of opportunity to make a living at what you love to do, there is only scarcity of resolve to make it happen.- Wayne Dyer

Offline mike_van

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Re: planer knives
« Reply #11 on: November 23, 2008, 05:36:31 pm »
My SCMI has 4 HSS knives, I get a few thousand bf easily.
I was the smartest 16 year old I ever knew.

Offline 50 Acre Jim

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Re: planer knives
« Reply #12 on: November 06, 2017, 07:50:54 am »
Reviving an old thread in my search for a decent, affordable planer. 

I bought a WEN 13" planer 6 months ago but now I realize it's not going to get the job done.  Kind of like mowing your lawn with a pair of scissors.  So I'm ready to chalk up the $250 to experience and find something that actually works. 

Part of the problem with the WEN is blade longevity.  Oh, and speed too.  So can I get some advice, please?   What planer do you guys use?  How long can I expect the blades to last (on Red Oak) and how much do the blades cost? 

TIA

Jim
Constantly reinventing the wheel...

Online btulloh

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Re: planer knives
« Reply #13 on: November 06, 2017, 08:10:58 am »
Jim, there'll be some good replies coming along but I'll throw in my 2 pesos to start.  At the minimum you need a 15" planer with a 2hp motor.  3hp would be better.  It will weigh 500-600 lbs.  Something like http://www.grizzly.com/products/15-Heavy-Duty-Planer/G0815 or equivalent.  There are lots of planers in this class from every manufacturer.  Your best bet to keep the price down is to watch CL for one.  A used planer will probably need a bit of cleaning, adjusting, and general TLC but can be brought back to life.  No matter what planer you get, you'll wish you had one wider with more power.  Something to manage the chips is pretty much a must also.  For a 15" planer you can get by with one of the bag-type dust collectors (if you don't already have one) that are not that expensive.  Lot's of people on here have had good luck with HF dust collectors.  Good luck on your quest.

Offline barbender

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Re: planer knives
« Reply #14 on: November 06, 2017, 08:55:08 am »
I found a my Grizzly 15" planer on CL locally for $500. I already had a smaller "lunchbox" style planer. I find the Grizzly is great for heavy planing, the lunchbox puts on a better finish so they compliment each other nicely.
Too many irons in the fire

Offline Don P

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Re: planer knives
« Reply #15 on: November 06, 2017, 01:04:26 pm »
I've got the Delta 15", DC380 I think, and a little 12" Delta lunchbox. I bought their 15" because the top moves rather than the bottom. I knew I would want to run some timbers and wanted to set up roller tables front and rear so adjusting the top worked well for me. I do have a set of cheap knives as well as several sets of good steel. There is definitely a difference in longevity when I have to throw the cheap ones on.

I will offer a pet peeve of mine, metric jackscrews. I'm used to the height adjustment being based on a jackscrew with SAE threads... American. If the screw has an 8 tpi pitch I know a turn equals 1/8". If its metric I got nothing... a turn is about 1/8" on mine, that isn't quite the same.

Offline 50 Acre Jim

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Re: planer knives
« Reply #16 on: November 06, 2017, 02:36:34 pm »
Spent some time on the Grizzly site and the G1033X looks to be just what I'm looking for.  Comparing it to the Powermatic, which was the previous front-runner, I'm liking the Grizzly a lot!  Especially the spiral carbide inserts cutterhead. 



Constantly reinventing the wheel...

Online btulloh

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Re: planer knives
« Reply #17 on: November 06, 2017, 03:40:36 pm »
Looks good.  I think the spiral carbide knives are a good choice.  They're a good compromise between straight knives and the Byrd head.  I doubt they eat up the power like the byrd head does.

Just my taste, but I prefer rollers instead of the machined infeed and outfeed tables.  Probably available on that planer.  Rollers usually run a bit cheaper, but who's counting beans anyway?  I just find that the rollers handle stock better and don't require as much slickum. 

I have a powermatic 15" and also a Grizzly 15".  The PM has a Byrd head, so I set up the Grizzly with straight knives for running rougher stuff than the byrd head likes to handle.  (My PM is really set up for finish work mostly.)

Anyhow, the interesting thing is that the grizzly (which is probably 20-25 years old) looks like an exact copy of the PM, with a few exceptions here and there.  The castings are the same.  They even used identical labels and placement.  (The PM does have some differences in drive belts, motor placement, etc.).  That Grizzly you're looking at looks freakishly like a PM as well.  At any rate, it looks like it would do you well.

BTW - You must have left off a zero when you said you were willing to spend $250.  I'm guessing the G1033X is probably a little more than that.

Looking forward to seeing your new planer up and running.
HM126

Offline 50 Acre Jim

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Re: planer knives
« Reply #18 on: November 06, 2017, 07:37:29 pm »
BTW - You must have left off a zero when you said you were willing to spend $250.  I'm guessing the G1033X is probably a little more than that.

lol, guess it was how I typed it.  But what I meant was that I would chalk up to experience the $250 that I spent on the WEN planer that I bought awhile back.   But yes, this one is about $3,400 (delivered) and I didn't think that was too bad.  Not for a 20" planer, right? 
Constantly reinventing the wheel...

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Re: planer knives
« Reply #19 on: November 07, 2017, 08:58:26 am »
Could be I just read it wrong.

Your new planer looks great.  Now I have planer envy.