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Forum topic by MaybeDave posted 01-17-2016 11:16 PM 579 views 0 times favorited 14 replies Add to Favorites Watch
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MaybeDave

2 posts in 322 days


01-17-2016 11:16 PM

Hi Guys,

New to Lumberjocks. Looking forward to contributing and learning from y’all.

I’m having a couple of different issues with my bandsaw (Ridgid 12”, I think?) and was hoping you could give me some insight.

First of all, the pulley wheel that runs the lower saw wheel has a wobble in it. (see video)

https://www.youtube.com/watch?v=TfLBzDtw3z0

Secondly, I did something dumb… I was trying to saw a log to make coasters, and didn’t secure it to the cross-cut sled. Rookie mistake! Of course it rolled on me and bound up the blade. Luckily, no injuries or major damage, but my blade is jacked up. (see photo) Can I just pound out that one spot flat and use it again safely? It’s damn near brand new… :-(

Thank you for your help!
Dave


14 replies so far

View conifur's profile

conifur

955 posts in 612 days


#1 posted 01-17-2016 11:22 PM

New blade. Other thing cant help with.

-- Knowledge and experience equals Wisdom, Michael Frankowski

View johnstoneb's profile

johnstoneb

2143 posts in 1633 days


#2 posted 01-17-2016 11:32 PM

Blade is ruined. Your pulley on the motor and the pulley on the saw are not in alignment. The saw pulley is bent if it isn’t causing a vibration probably run it.

-- Bruce, Boise, ID

View 30yrwood's profile

30yrwood

8 posts in 324 days


#3 posted 01-17-2016 11:46 PM

the wobble in your pulley may not be the pulley, it may be a bad keyway if it has one. if so unbolt pulley and put on diff. shaft to see if its the pulley. if it doesn’t wobble on other shaft, check keyway & make sure key hasn’t moved, sheared off or fell out from vibration. good luck!!

View teejk02's profile

teejk02

423 posts in 586 days


#4 posted 01-17-2016 11:59 PM



the wobble in your pulley may not be the pulley, it may be a bad keyway if it has one. if so unbolt pulley and put on diff. shaft to see if its the pulley. if it doesn t wobble on other shaft, check keyway & make sure key hasn t moved, sheared off or fell out from vibration. good luck!!

- 30yrwood


Noticed on my Delta 14” a few weeks ago that the pulley cover had opened up…for some reason the pulley decided to take a walk…guess the allen screw holding the key “relaxed”. Fortunately I discovered it before any damage was done (although I have it on my list to reposition the motor and see if I can move the wheel pulley further onto the shaft…the saw is 15 years old and that drive pulley was always pretty close to the end of the shaft in order to align the belt).

View teejk02's profile

teejk02

423 posts in 586 days


#5 posted 01-18-2016 12:20 AM

Not being critical here…but…sawing logs for coasters? Doesn’t look like the right blade for that to me. Further to that did you have enough tension on it? I’ll grant you that it might have been a mechanical failure that set the wheels in motion (see my earlier post about things we don’t notice until something happens). Hope you wear safety glasses! This could have turned out bad. p.s. I think your saw will be fine…they are pretty tough.

View distrbd's profile (online now)

distrbd

2227 posts in 1907 days


#6 posted 01-18-2016 12:22 AM


Noticed on my Delta 14” a few weeks ago that the pulley cover had opened up…for some reason the pulley decided to take a walk…guess the allen screw holding the key “relaxed

- teejk02


The same thing happened to my 14” Delta clone, I found out why, the motor pulley and the wheel pulley were not aligned , the key had come loose ,found it in the pile of dust, put it back in the keyway,used blue locktite on the set screws holding the key, realigned the pulley,and that was it, back to be fully operational.

I think the OP’s(maybedave) pulley has a bigger problem that misalignment ,it looks like the hole in the center has been enlarged somewhat and causes it to wobble so violently like that.if that’s the case, a new pulley would be needed or if the hole is not too badly damaged a brass bushing could be fitted to get rid of the slop.

-- Ken from Ontario, Canada

View TheFridge's profile

TheFridge

5764 posts in 946 days


#7 posted 01-18-2016 12:22 AM

Blade is trashed.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View MaybeDave's profile

MaybeDave

2 posts in 322 days


#8 posted 01-18-2016 12:34 AM



Not being critical here…but…sawing logs for coasters? Doesn t look like the right blade for that to me. Further to that did you have enough tension on it? I ll grant you that it might have been a mechanical failure that set the wheels in motion (see my earlier post about things we don t notice until something happens). Hope you wear safety glasses! This could have turned out bad. p.s. I think your saw will be fine…they are pretty tough.

- teejk02

The blade was properly tensioned and I was wearing safety gear, but as someone who did something this dumb, I could use a little criticism! :-) What blade would be more appropriate? I figured larger stock meant thicker blade and fewer TPI. The logs are approx. 4” in diameter.

Thanks guys for your responses.

View dhazelton's profile

dhazelton

2322 posts in 1757 days


#9 posted 01-18-2016 12:36 AM

I agree that the blade tension was too loose. But you need to learn how to tune up your bandsaw. I got mine for under $10 used on Amazon.

http://www.amazon.com/dp/1561582891/?tag=googhydr-20&hvadid=30951628101&hvpos=1t1&hvexid=&hvnetw=g&hvrand=18361895924619237058&hvpone=&hvptwo=&hvqmt=b&hvdev=c&ref=pd_sl_6niozmozyi_b

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MrUnix

4207 posts in 1659 days


#10 posted 01-18-2016 12:49 AM

Blade is still usable – straighten it out as best you can and use it until your new one arrives :)
(Or until it breaks, whichever comes first!)

The pulley on your saw appears to be bent, since the shaft itself seems to run true. That could be caused by a few different things, but you will need to pull it off to examine. If it’s not causing too much vibration, you can run it that way, but chances are you are looking at getting a replacement, either OEM or aftermarket.

And here is the obligatory band saw tune up video:
Band Saw Clinic with Alex Snodgrass

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View gfadvm's profile

gfadvm

14940 posts in 2150 days


#11 posted 01-18-2016 01:42 AM

I too would straighten that blade and try to get some use from it (use a wooden mallet to pound on it and a wooden “anvil” to lay it on).

The pulley wobble could be several things: bent pulley, loose screw connecting to shaft, etc but should be easy to remove and check out.

Attach round to a sled securely before cross cutting! Never mind, you already learned this the hard way :)

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View TheWoodRaccoon's profile

TheWoodRaccoon

364 posts in 390 days


#12 posted 01-18-2016 03:55 AM

You probably could pound out the blade and use it again, but it won’t cut like it used to. It might damage your bandsaw tires, and it may put excessive wear on your guides. From what i see in the video, it looks like the pulley on the saw is either bent, or isn’t secured properly. If you look at the pulley, youll see a hole in the hub, with a hex head set screw in it. That is supposed to push down on the square piece of steel or “key” which makes sure the pulley doesn’t slip on the shaft when it gets torqued. Make sure that the key is in there, and that its seated properly. If after you tighten down and re- align the pulley, it still wobbles, then the pulley itself is bent or out of round.If thats the case, you might want to contact the manufacturer and get a replacement, or an aftermarket part.

-- still trying to think of a clever signature......

View teejk02's profile

teejk02

423 posts in 586 days


#13 posted 01-18-2016 02:01 PM


Not being critical here…but…sawing logs for coasters? Doesn t look like the right blade for that to me. Further to that did you have enough tension on it? I ll grant you that it might have been a mechanical failure that set the wheels in motion (see my earlier post about things we don t notice until something happens). Hope you wear safety glasses! This could have turned out bad. p.s. I think your saw will be fine…they are pretty tough.

- teejk02

The blade was properly tensioned and I was wearing safety gear, but as someone who did something this dumb, I could use a little criticism! :-) What blade would be more appropriate? I figured larger stock meant thicker blade and fewer TPI. The logs are approx. 4” in diameter.

Thanks guys for your responses.

- MaybeDave

Your logic in blades makes sense to me…I couldn’t tell what size you had but if 1/2” or larger blade did that, WOW. Sounds like it was a very “exciting” instant of time when things went south. As for whether the log proceeded to cause your other problems, I somehow doubt it. The guts of the machine (at least on my Delta) are pretty much bullet proof)...the blade is your weakest link and I would expect it to snap first (another “exciting” time).

View teejk02's profile

teejk02

423 posts in 586 days


#14 posted 01-18-2016 02:10 PM


Noticed on my Delta 14” a few weeks ago that the pulley cover had opened up…for some reason the pulley decided to take a walk…guess the allen screw holding the key “relaxed
- teejk02

The same thing happened to my 14” Delta clone, I found out why, the motor pulley and the wheel pulley were not aligned , the key had come loose ,found it in the pile of dust, put it back in the keyway,used blue locktite on the set screws holding the key, realigned the pulley,and that was it, back to be fully operational.
I think the OP s(maybedave) pulley has a bigger problem that misalignment ,it looks like the hole in the center has been enlarged somewhat and causes it to wobble so violently like that.if that s the case, a new pulley would be needed or if the hole is not too badly damaged a brass bushing could be fitted to get rid of the slop.
- distrbd

I remember setting the machine up years ago and took great pains to assure the pulleys were aligned. I also remember that the upper pulley was pretty close to the end of the shaft. I should have taken the time to reposition the motor but it ran for years without problem. Was only because the door opened up did I notice it (who ever bothers to open that door other than for an occasional cleaning)?

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