The Forestry Forum is sponsored in part by:

iDRY Vacuum Kilns


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.




Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

Michigan Firewood, your BRUTE FORCE Authorized Dealer

Baker Products

ECHO-Bearcat

iDRY Wood Lumber Vacuum Drying for everyon

Nyle Kiln Dry Systems

Chainsawr, The Worlds Largest Inventory of Chainsaw Parts

Smith Sawmill Service



Author Topic: Blade Life Expectancy  (Read 1024 times)

0 Members and 1 Guest are viewing this topic.

Offline Tin Horse

  • Full Member x2
  • ***
  • Posts: 212
  • Location: Ontario, Canada
  • Gender: Male
    • Share Post
Blade Life Expectancy
« on: June 01, 2021, 12:46:12 PM »
For the past several months I've been using the WM 747's. I've been happy with the results as far as speed and accuracy. But blade life seems low. To explain they are 1 1/4" x .055 x 195" 747's. These are the first .055 I've tried. Anything else has been .042" and good life, no cracking.. I'll get maybe 3-4 sharpenings with the 747's. After that major multiple gullet cracks show up. Never had this before. Belts are good, 24" wheels, 35 HP Kubota diesel. Only using in WP. They do seem to cut longer and maybe I'm running to long between sharpening. Using a Cooks sharpener. As noted by others they do loose tips quick on a nail strike.
So long story short I've ordered The turbo 7's in .055 x 1 1/2". Others here seem to prefer these. Also ordered the BMS 250 sharpener.
I've been debating the move to CBN for a long time.
Thoughts???
Bell 1000 Wood Processor. Enercraft 30HTL, Case 580SL. Kioti 7320.

Offline doc henderson

  • Senior Member x2
  • *****
  • Posts: 7739
  • Age: 61
  • Location: Hutchinson, Ks
  • Gender: Male
  • Evil Prevails when Good Men Standby and Do Nothing
    • Share Post
Re: Blade Life Expectancy
« Reply #1 on: June 01, 2021, 01:07:49 PM »
I just got my TK sharpener, and may still be on the learning curve, but pretty luke warm.
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline Dave Shepard

  • Senior Member x2
  • *****
  • Posts: 11438
  • Age: 2016
  • Location: Alford Massachusetts
  • Gender: Male
  • Geometrically proportional
    • Share Post
    • My homepage
Re: Blade Life Expectancy
« Reply #2 on: June 01, 2021, 02:11:47 PM »
4-5 sharpenings on .055" is about right.

Edit: I meant to say 3-4 sharpenings was about right. A total of five times on the mill from new. 
Wood-Mizer LT40HDD51-WR Wireless, Kubota L48, Honda Rincon 650, TJ208 G-S, and a 60"LogRite!

Offline Magicman

  • Senior Member x2
  • *****
  • Posts: 41827
  • Age: 78
  • Location: Brookhaven, MS
  • Gender: Male
  • A "Traveling Man"
    • Share Post
    • Knothole Sawmill
Re: Blade Life Expectancy
« Reply #3 on: June 01, 2021, 04:04:39 PM »
As with any blade, much depends upon how long you sawn between blade changes.  Saw until they are not sharp.  If you run them until they are dull, your blade life will be greatly reduced.  

Yes, there is a difference.  You take care of your blades and your blades will take care of you.

Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline Southside

  • Administrator
  • *****
  • Posts: 9392
  • Age: 49
  • Location: Wilsons (Dinwiddie County), VA
  • Gender: Male
  • Have a plan to saw every log you meet.
    • Share Post
    • White Oak Meadows
Re: Blade Life Expectancy
« Reply #4 on: June 01, 2021, 08:01:01 PM »
I have seen increased life switching from Double Hards to Silver Tip bands, the additional plus is they are cheaper. 
Franklin buncher and skidder
JD Processor
Woodmizer LT Super 70 and LT35 sawmill, KD250 kiln, BMS 250 sharpener and setter
Riehl Edger
Woodmaster 725 and 4000 planner and moulder
Enough cows to ensure there is no spare time.
White Oak Meadows

Offline Ohioian

  • member
  • *
  • Posts: 20
  • Age: 61
  • Location: Braceville Ohio
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #5 on: June 01, 2021, 08:32:22 PM »
I don't have much experience with wood blades, yet! But before I retired recently I spent 25 plus years doing r & r on both bandsaw and carbide tipped circular blades cutting some of the toughest metals made.
  Carbide tipped (cbn) is the most expensive but if your after production, (2 to 3 times faster cutting) is the way to go. Highest cost but high reward, but also high risk when you hit that nail 😤
 Next would be bimetal, carbon backing with high speed steel edge for cutting. Two blade manufacturers are now using powder high speed wire for the cutting edge. About half the cost of carbide but more forgiving.

Offline dgdrls

  • Senior Member x2
  • *****
  • Posts: 3380
  • Age: 57
  • Location: Central NY
  • Gender: Male
  • Learning the Art of Milling Logs
    • Share Post
Re: Blade Life Expectancy
« Reply #6 on: June 01, 2021, 08:46:00 PM »
How long are you running the blades?
I've read articles/guides indicating exactly what you're reporting. lower hook angle blades crack in the gullet after a number of sharpenings,
causes being:  hook angle too low, run too long, sharpening down through the gullet, generating too much heat and taking the temper out of the gullet area.

D








Offline Fern Wood

  • member
  • *
  • Posts: 19
  • I'm new!
    • Share Post
Re: Blade Life Expectancy
« Reply #7 on: June 01, 2021, 09:29:43 PM »
Im averaging around 4 sharpenings  on turbo 7s , .055. Using cbn wheel.

Offline Tin Horse

  • Full Member x2
  • ***
  • Posts: 212
  • Location: Ontario, Canada
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #8 on: June 01, 2021, 09:41:56 PM »
How long are you running the blades?
I've read articles/guides indicating exactly what you're reporting. lower hook angle blades crack in the gullet after a number of sharpenings,
causes being:  hook angle too low, run too long, sharpening down through the gullet, generating too much heat and taking the temper out of the gullet area.

D
Working alone a band would run maybe 2 hrs; 5 to 6 medium size WP. Cutting mainly 1" x 10". I sticker and stack each board as I go. Blade engagement stays on on my mill unlike others. Now wondering if blade is running more than .055" likes even on 24" wheels. I do lite sharpening but the cam match to profile isn't perfect. This is partially why I'm switch to CBN.
Bell 1000 Wood Processor. Enercraft 30HTL, Case 580SL. Kioti 7320.

Offline Tin Horse

  • Full Member x2
  • ***
  • Posts: 212
  • Location: Ontario, Canada
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #9 on: June 01, 2021, 09:53:05 PM »
I have seen increased life switching from Double Hards to Silver Tip bands, the additional plus is they are cheaper.
I agree; But WM rep. felt I wouldn't get much life out of the silver tip. ( I realize others on here are prefering them) The other issue is wait times in Ontario. Stocked sizes about 2 weeks. Anything else about 2 months. They mainly stock 10 degree for the majority. I was going to go for .045" as a compromise in T7 but would take longer on order. 
Bell 1000 Wood Processor. Enercraft 30HTL, Case 580SL. Kioti 7320.

Offline Chuck White

  • Senior Member x2
  • *****
  • Posts: 12820
  • Age: 72
  • Location: Russell, NY (Way Upstate)
  • Gender: Male
  • Sawing Mobile since 2005
    • Share Post
Re: Blade Life Expectancy
« Reply #10 on: June 02, 2021, 07:06:13 AM »
I've always used 1x158x.045 Wood-Mizer Double Hards.

On average I'll get 12-18 sharpenings, doing a light sharpen, and not necessarily getting the full gullet!

I'm very satisfied with these results, as are some locals that I sharpen for!

I always disengage the blade when gigging back to the front!

The engagement time of the blade also affects blade-life!
~Chuck~
Retired USAF 1989, Retired School Bus Driver 2012, now semi-retired Mobile Sawyer, 2018 Silverado 4X4
1995 Wood-Mizer LT40HDG25 Kohler - Cooks Cat Claw Sharpener and single-tooth setter, 4-foot Logrite cant hook.
Basic mechanical skills are all that's required to maintain a Wood-Mizer

Offline Tin Horse

  • Full Member x2
  • ***
  • Posts: 212
  • Location: Ontario, Canada
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #11 on: June 02, 2021, 07:21:10 AM »
I've always used 1x158x.045 Wood-Mizer Double Hards.

On average I'll get 12-18 sharpenings, doing a light sharpen, and not necessarily getting the full gullet!

I'm very satisfied with these results, as are some locals that I sharpen for!

I always disengage the blade when gigging back to the front!

The engagement time of the blade also affects blade-life!
Thanks and I agree. I felt the .045 would be a good choice also but for availability here. Also I think now your also right about blade engagement time. My mill is wired remote accept for manual lever to idler at engine. I generally stay at the front. This method seemed to work well with the .042 band. 
Bell 1000 Wood Processor. Enercraft 30HTL, Case 580SL. Kioti 7320.

Offline Tin Horse

  • Full Member x2
  • ***
  • Posts: 212
  • Location: Ontario, Canada
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #12 on: June 03, 2021, 08:41:53 AM »
Thanks all for help and comments, especially southside. Greatly appreciated. Gonna try the silvertips.
Bell 1000 Wood Processor. Enercraft 30HTL, Case 580SL. Kioti 7320.

Offline scsmith42

  • Senior Member x2
  • *****
  • Posts: 5584
  • Age: 61
  • Location: New Hill, NC
  • Gender: Male
  • He who dies with the most toys... WINS!!!
    • Share Post
    • Whispering Pines Farm
Re: Blade Life Expectancy
« Reply #13 on: June 03, 2021, 08:58:19 AM »
On my Baker I've discovered that anything more than 2 hours of rotating time on the mill will result in gullet cracks. Usually I'm pulling them off while they are still sharp in order to minimize losses due to breaking.

Peterson 10" WPF with 65' of track
Smith - Gallagher dedicated slabber
Tom's 3638D Baker band mill
and a mix of log handling heavy equipment.

Offline bannerd

  • Full Member x2
  • ***
  • Posts: 115
  • Location: Malone, NY
  • Gender: Male
  • Madman
    • Share Post
Re: Blade Life Expectancy
« Reply #14 on: June 03, 2021, 09:07:02 AM »
Blade life depends on so many things, dirty bark, lubricant, the degree of set (less or more heat), blade tension. I own a TK sharper and I run a 40 degree on the front and back of the tooth.  There is a set nylon block from TK that works but a little more inward degree keeps that gullet clean and moves the wood faster out of the channel.

Generally go through 3-4 pines before a blade will go on the sharpener.

Offline barbender

  • Senior Member x2
  • *****
  • Posts: 8774
  • Age: 46
  • Location: Deer River MN
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #15 on: June 03, 2021, 11:06:54 AM »
I don't get good life out of .055" blades, 3-4 sharpenings and they go boom! I personally don't buy the "grind the micro-crack out of the gullet" theory, to stop the failures. I think they are only going to make it around the wheels so many times before metal fatigue gets them. Usually bands are hard to break by hand, to get them in smaller chunks to dispose of. When the .055 (and .050) break, the whole blade is fatigued to the point where I can fold them and they easily break at the fold. The metal is ready to just crumble.
  I'll second the Silvertips. They cut just as well as the Doublehards with better flex life, they're cheaper, and you can also get them from secondary blade sellers if WM is backed up.
Too many irons in the fire

Offline YellowHammer

  • Senior Member x2
  • *****
  • Posts: 6055
  • Age: 56
  • Location: New Market, Alabama
  • Gender: Male
  • Take Steps to Save Steps
    • Share Post
    • Hobby Hardwood Alabama
Re: Blade Life Expectancy
« Reply #16 on: June 03, 2021, 12:13:00 PM »
I have switched completely to Silver Tips over Double Hards. Lower price, much better flex life, cut just as long or longer.  Win/win/win

I use .055 x 1.5 on an LT70

   
YellowHammerisms:

Take steps to save steps.

If it wont roll, its not a log; its still a piece of tree.  Sawmills cut logs, not pieces of trees.

Kiln drying wood: When the cookies are burned, theyre burned, and you cant fix them.  Dont burn the cookies.

Offline Tin Horse

  • Full Member x2
  • ***
  • Posts: 212
  • Location: Ontario, Canada
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #17 on: June 03, 2021, 12:59:17 PM »
I have switched completely to Silver Tips over Double Hards. Lower price, much better flex life, cut just as long or longer.  Win/win/win

I use .055 x 1.5 on an LT70

  
As I type that's the one I'm trying to get here in Ontario. Getting a price by southside suggestion.
Bell 1000 Wood Processor. Enercraft 30HTL, Case 580SL. Kioti 7320.

Offline KenMac

  • Senior Member
  • ****
  • Posts: 410
  • Age: 66
  • Location: Near Pell City, Alabama
  • Gender: Male
  • I'm new, but don't feel so new!
    • Share Post
Re: Blade Life Expectancy
« Reply #18 on: June 03, 2021, 10:06:58 PM »
I run Cook's Super Sharp 8* .055x1 1/2 blades and have found that if I just hit tips on front and back instead of following entire profile I can get 3 or 4 sharpenings. If I follow the entire profile and just barely clean up the gullet most blades will crack in the gullets and break during the next use. This is not a scientific study but has happened often enough to convince me to sharpen the bare minimum to get longer blade life. Y'all taikng about these silver tips has me thinking about trying them if Cook's can supply a cam for my Cat's Claw.
Cook's AC3667t, Cat Claw sharpener, Dual tooth setter, and Band Roller, Kubota B26 TLB

Offline barbender

  • Senior Member x2
  • *****
  • Posts: 8774
  • Age: 46
  • Location: Deer River MN
  • Gender: Male
    • Share Post
Re: Blade Life Expectancy
« Reply #19 on: June 04, 2021, 12:44:10 AM »
I remember in one of Cook's tech sharpening tip articles the brother that writes them was saying he thinks a lot of gullet cracks come from too heavy of a grind in the gullet getting the metal hot enough that it air hardens, makes sense to me.
Too many irons in the fire


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
LT40 Super blade guide life expectancy.

Started by Dave Shepard on Sawmills and Milling

5 Replies
819 Views
Last post September 24, 2018, 09:40:08 PM
by YellowHammer
xx
Woodmaster life expectancy

Started by Button on Firewood and Wood Heating

2 Replies
6263 Views
Last post January 01, 2011, 04:42:39 PM
by Button
xx
Life expectancy of fence posts.

Started by hackberry jake on Sawmills and Milling

39 Replies
39497 Views
Last post June 10, 2012, 05:25:51 AM
by SwampDonkey
xx
What is the life expectancy of a mill cover?

Started by backwoods sawyer on Sawmills and Milling

24 Replies
5337 Views
Last post November 17, 2009, 05:25:15 PM
by backwoods sawyer
 


Powered by EzPortal