Bandsaw Tensioner “Digging In”
Hi All,
I have been using my Jet 14″ bandsaw very happily for a while now. I love this saw, and I have written lots of positive things about it.
I recently installed a new high-tension spring, and a tension rod handle. This makes blade tensioning a lot easier.
However, I have noticed that the tension rod is digging into the cast iron of the saw body. At first, it was just a little bit of scraping, but then I noticed it was actually digging up black powder that is collecting all around where the tension rod meets the saw body.
Can someone please explain why this would happen? And what does it mean? Is my saw on its way out?
Edited 7/12/2004 5:08 pm ET by Matthew Schenker
Replies
CI is MUCH softer then most folks realize..might wanna make a washer out of UHMW plastic or a circle from say a tupperware type lid..a little lubricity goes a long way
Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations.
So does this mean that it is not a bad thing for the tension rod to dig into the saw body? I just have to give the rod another surface to dig into, like a washer or something?
It's not a bad thing if you want a hole in the top ;-)
I have the same spring in my ancient Delta with no (at least not yet) trouble. If I was experiencing what you are seeing, I'd start by rounding the screw as Louis says, and going with a dollop of grease at the pressure point. (Actually, knowing me, I'd attempt to epoxy something suitable on that spot. If it didn't stick, and the grease didn't eliminate the problem, then I'd go with the tapped hole and stick a bolt into it.
Sounds like you can rest easy, Matthew. No more nightmares about losing your favorite bandsaw, LOL!forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)Another proud member of the "I Rocked With ToolDoc Club" .... :>)
Forestgirl,
Yes, I would hate that. Of course, it could also be an excuse to get a new saw!
like the others have said too, whatever floats yer boat. Try the easiest for you first..then try something else if that fails.
Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations.
Louis Iturra has several suggestions:
You might also try cleaning up the casing, and epoxying on a smallish washer that the screw would press on. You'd still want to round off the tip of the screw. With welding/brazing equip you could actually put the washer on the tip of the screw, but if you ever needed to remove the screw you'd curse the dickens out of me if you followed this suggestion, LOL.
Louis Iturra: The Bandsaw God. Gotta love him.
Regards,
Boris
"Sir, I may be drunk, but you're crazy, and I'll be sober tomorrow" -- WC Fields, "Its a Gift" 1934
I put a high tension spring on my Grizz BS a while back.When I did, it I also took an old crank handle I had lying around and made a new tension rod out of 3/8 threaded rod.Instead of grinding the tip of the rod to a point I attached an acorn nut on the end after I pushed the rod thru the tensioner. It stays in place on the casting and has not damaged it at all.
Mike
Mike,
I like your idea, and I think I need to do it soon, as I have a big project coming up where I'll be using the bandsaw.
Thanks for your help.
Matt
Can someone please explain why this would happen? And what does it mean? Is my saw on its way out?
Obviously a bad casting. This could be really dangerous, i.e., the tensioner assembly could snap while you're using the saw, sending razor sharp shards of metal directly into your face, where they could blind you or even kill you to death.
I strongly recommend that you send this death trap of a machine to me for proper disposal immediately.
Sincerely,
AB Frise
Tampa, FL
p.s. I am so concerned for your safety that I'll even pay for shipping.
(;
Augie,
I hate to ruin a good joke, but could you please clarify which parts of your last post are really a joke and which parts are serious?
I ned to know, sO Idon't have nightmares!
Sure, no problemo.
The joke part was:
And the serious part was:
How's that?
(:
Augie,
OK, now I can enjoy your joke!!
Matthew,
This identical situation occurred on one of the Jets (a 14" with a new Iturra Design spring) in my shop. To correct the problem and prevent further damage, I first filed the tip of the adjusting rod to a more rounder configuration. Then, using a metal punch, I hammered a divot into the center of a metal knock-out blank from an electrical junction box. If you back up the metal blank with a soft wood (e.g. pine 2x4), you can make the divot project through the other side which helps seat it in the damaged cast iron hole. I put the divoted blank in place, added a squeeze of bearing grease (I had it lying around), and retensioned the saw with the adjusting rod in the divot. It's rock solid, and hasn't shown any signs of wear yet.
Dan Kornfeld, Owner/President - Odyssey Wood Design, Inc.
Jackie,
Great idea! Thanks.
I read about the a solution to this problem from an Aussie forum. Use an axle nut on the end of the end of the tensioning rod like you used to see on wagons and such. These have a solid rounded end which won't gouge into your frame.
Cheers
Bud,
Thanks for your input. I'll definitely do one of these things, before the tensioner digs all the way through!!!
Thanks again!
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