LumberJocks

All Replies on band saw blade broke why

  • Advertise with us
View Karda's profile

band saw blade broke why

by Karda
posted 09-10-2018 05:20 PM


14 replies so far

View bondogaposis's profile

bondogaposis

5538 posts in 2856 days


#1 posted 09-10-2018 05:35 PM

Did it break at the weld?

-- Bondo Gaposis

View 000's profile

000

2859 posts in 1404 days


#2 posted 09-10-2018 05:40 PM

As the blade slowed down it may have started walking off the wheel until it hit the throat plate and snapped.
But that’s only a guess, no telling without being there

View CWWoodworking's profile

CWWoodworking

528 posts in 684 days


#3 posted 09-10-2018 11:07 PM

Welds occasionally brake. I use 10ish blades a month. Buy them in lots of 12. I can always tell when I get a “not so great batch”. But next time I will get blades you can’t break.

For me, it all evens out.

I don’t think it was the throat plate.

I cut chunky letters out of 3” thick wood. I hit mine all the time, just dulls blade.

View 000's profile

000

2859 posts in 1404 days


#4 posted 09-10-2018 11:25 PM


Welds occasionally brake. I use 10ish blades a month. Buy them in lots of 12. I can always tell when I get a “not so great batch”. But next time I will get blades you can’t break.

For me, it all evens out.

I don’t think it was the throat plate.

I cut chunky letters out of 3” thick wood. I hit mine all the time, just dulls blade.

- CWWoodworking


Might not have been the throat plate, I was only guessing.

Yours may only be dulling the blade because you are hitting it at running speed.
If the blade has slowed enough it has a bigger chance of catching a tooth.
In my experiences, blades don’t usually snap when your not cutting with it, must have caught on something.
But since you go through 10 a month you must have a lot more experience than I.

View GR8HUNTER's profile

GR8HUNTER

6436 posts in 1217 days


#5 posted 09-10-2018 11:57 PM

10ish blades a month
HOLY MOLY :<(((((((((((((((((

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View CWWoodworking's profile

CWWoodworking

528 posts in 684 days


#6 posted 09-11-2018 12:26 AM


Might not have been the throat plate, I was only guessing.

Yours may only be dulling the blade because you are hitting it at running speed.
If the blade has slowed enough it has a bigger chance of catching a tooth.
In my experiences, blades don t usually snap when your not cutting with it, must have caught on something.
But since you go through 10 a month you must have a lot more experience than I.

- jbay

Or I just abuse my saw. :). Honestly when I’m on the bandsaw, I have to be flying to make money. Since I don’t sacrifice my fingers. Blades occasionally get in a bind, hit the plate, pull it off the wheels, etc.

I have literally stopped the blades against the plate/wood and have not broke a blade. YMMV

We are both guessing really. Just sharing my thoughts.

View CWWoodworking's profile

CWWoodworking

528 posts in 684 days


#7 posted 09-11-2018 12:32 AM



10ish blades a month
HOLY MOLY :<(((((((((((((((((

- GR8HUNTER

I make 3” thick letters. Some tight corners. I use a 3/16” aggressive blade. Cuts great but 3/16” ain’t much meat. But blades are cheap compared to labor. I only pay 12$ per blade.

On rare occasion, I have made close to 300 pieces in a week.

View Dark_Lightning's profile

Dark_Lightning

3579 posts in 3614 days


#8 posted 09-11-2018 12:36 AM


10ish blades a month
HOLY MOLY :<(((((((((((((((((

- GR8HUNTER

I make 3” thick letters. Some tight corners. I use a 3/16” aggressive blade. Cuts great but 3/16” ain’t much meat. But blades are cheap compared to labor. I only pay 12$ per blade.

On rare occasion, I have made close to 300 pieces in a week.

- CWWoodworking

Holy smokes! Have you considered drilling inside corners to take some tweak off the blades?

-- Steven.......Random Orbital Nailer

View CWWoodworking's profile

CWWoodworking

528 posts in 684 days


#9 posted 09-11-2018 12:41 AM

Just takes to long. I just figure the cost of blades into product. When you figured per piece, it’s less than a $1. Some products, it’s less than .50. Labor cost more

View Karda's profile

Karda

1691 posts in 1058 days


#10 posted 09-11-2018 12:44 AM

thanks for your input, yes the blade broke ay the weld. got the bill for the blade today, I bought it 8/11. haven’t used it a month. oh well gotta move on. Just wish I knew why it happend so I could avoid it

View AHuxley's profile

AHuxley

874 posts in 3826 days


#11 posted 09-11-2018 01:05 AM



thanks for your input, yes the blade broke ay the weld. got the bill for the blade today, I bought it 8/11. haven t used it a month. oh well gotta move on. Just wish I knew why it happend so I could avoid it

- Karda

If the blade broke at the weld most reputable dealers will replace it.

View Karda's profile

Karda

1691 posts in 1058 days


#12 posted 09-11-2018 02:43 AM

ok I’ll give him a call

View a1Jim's profile

a1Jim

117721 posts in 4082 days


#13 posted 09-11-2018 03:23 AM

Not sure if you take the pressure off of the blades when not using your band saw or not but if you do loosen it, it can save blades and bearings on your saw.

View AHuxley's profile

AHuxley

874 posts in 3826 days


#14 posted 09-11-2018 03:55 AM



Not sure if you take the pressure off of the blades when not using your band saw or not but if you do loosen it, it can save blades and bearings on your saw.

- a1Jim

That is really more myth than reality. The forces on the bearings even on larger high tension bandsaws are far below the bearing ratings, even cheap Chinese bearings. The static forces on the blades and bearings are about 20% of those when running, it just does not appreciably increase the work hardening in blades or wear on bearings. In fact, research shows the prime reason for fatigue cracks in bandsaw blades is a result of surface roughness in the gullets being too high and providing nucleation points for the cracks. It also shows the static strain is a very small factor. Small wheels are also a much larger factor. I have had carbide bands on some of my bigger saws sitting at 28-30k psi for years, only removed for resharpening and yet to break one that wasn’t a result of a poor penetration weld or an accidental shock like hitting a large stone or chunk of metal while the wood is being driven into the blade with a feeder. The main issue is when low-quality tires take a set from not being run but still under pressure, like bias ply tires. Releasing tension primarily a marketing ploy to sell saws with quick releases.

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