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Bandsaw blade weld

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Forum topic by siouxdawgs0409 posted 1223 days ago 1080 views 0 times favorited 7 replies Add to Favorites Watch
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siouxdawgs0409

107 posts in 1720 days


1223 days ago

I just purchased a bandsaw a little while back. I was running a 1/4 inch blade on it and it worked great. I switched to a 3/8 for some resawing and when I was setting it up I noticed that when I was adjusting the guides the blade seems to get wider at the weld. In otherwords it is not possible to set up my back support to an accurate spacing. Has anyone else seen this? Any remedies? The blade is a wood slicer from highland woodworking..


7 replies so far

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D_Allen

495 posts in 1410 days


#1 posted 1223 days ago

Send a closeup picture of it to the vendor and ask them to replace it and pay for all the shipping.

-- Website is finally up and running....www.woodandwrite.com

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siouxdawgs0409

107 posts in 1720 days


#2 posted 1223 days ago

Well I live about 30 miles from Highland hardware. So might just bring it back in.

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Loren

7396 posts in 2274 days


#3 posted 1223 days ago

That’s not so uncommon. I’ve ground the back of a blade down before
to even it out. That’s what the manufacturer should have done. If
the ends are butted unevenly, that’s a real QC problem though.

-- http://lawoodworking.com

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WayneC

12260 posts in 2724 days


#4 posted 1223 days ago

If it is not too severe you could try one of these.

http://www.woodcraft.com/Product/2007303/10036/Blade-Tuning-Stone.aspx

-- We must guard our enthusiasm as we would our life - James Krenov

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patron

13001 posts in 1967 days


#5 posted 1223 days ago

take it back
get a better one
it will just break at the weld
as it bangs against the back roller
and just generally mess with the machine thumping around

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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Planeman40

470 posts in 1387 days


#6 posted 1223 days ago

The problem you have isn’t right but it is all too common.

Bandsaw blades are electrically butt-welded and this creates “flash” (excess metal from the welding process that protrudes from the weld joint) that must be ground or filed down and smoothed. In addition, occasionally the blade ends are not properly aligned to each other during the weld. In both cases this causes a thumping sound as the blade travels through the guides and creates stress on the joint leading to premature blade breakage.

If the blade weld is in alignment, just take a file and file the flash down.

Another cause of blade breakage is poor annealing of the joint after it is welded. After the weld has taken place a lower current is run through the joint to reheat the welded area to anneal the steel. If this is not done properly the blade will soon break at the weld.

For all of these reasons I have taken to buying my blades in 100 foot rolls and silver brazing the joint myself. The ends of the blade must be ground or filed with a tapering overlap known as a “scarf joint” and this takes some doing, but I rarely have problems with the joint.

Planeman

-- Always remember: It is a mathematical certainty that half the people in this country are below average in intelligence!

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bubinga

861 posts in 1294 days


#7 posted 1223 days ago

I always stone the back of my blades, but I think the one you got you should take back

-- E J ------- Always Keep a Firm Grip on Your Tool

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