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Thread: Why release the tension?

  1. #46
    Join Date
    Mar 2005
    Location
    Cashiers NC
    Posts
    481
    I had a Delta clone that I never released the tension on. My new Laguna has a tension lever. I release it when I shut the shop up for the day. I keep a stick laying on the table that has ďtension sawĒ wrote on it. I tension it and remove the stick before use. I have no idea if it helps but it canít hurt.
    Charlie Jones

  2. #47
    Why release tension? Simple, to change the blade.

  3. #48
    Join Date
    Dec 2006
    Location
    Toronto Ontario
    Posts
    10,392
    In 40 years in industry Iíve never seen a saw detensioned and do it at home either.

    I have a 90 year old motorcycle and itís valve springs have never been detensioned.

    I have fathers in metallurgists, they design good alloys......Rod

  4. #49
    Join Date
    Mar 2014
    Location
    Houston, TX
    Posts
    409
    I forgot one time and the blade popped out of the slot next to the on button and cut my finger when I turned it on. It stays tensioned now. No reason not to those tires are cheap and it's easy to put them on.

  5. #50
    Join Date
    Mar 2014
    Location
    Houston, TX
    Posts
    409
    I've never understood why they don't put a removable cover over that slot.

  6. #51
    Quote Originally Posted by Travis Conner View Post
    I've never understood why they don't put a removable cover over that slot.
    That's a good point. It should be easy to do. I'd buy a roll of dry erase magnet "stuff" like this (LINK) and cut it to length/width then overlay the slot.
    "All that is necessary for the triumph of evil is that good men do nothing."
    - Sir Edmund Burke

  7. #52
    Join Date
    Mar 2014
    Location
    Houston, TX
    Posts
    409
    It took like 4 months for that cut to heal too since it was at the tip of my finger it would constantly reopen the cut when I bent it.

  8. #53
    I got my 14" cast iron Delta new in 1996. It has only been detensioned for blade changes. It works as well today as it did when I bought it 25 years ago. I have never broken a blade; blade changes are have only been because they have gone dull from wear. It gets hobby use, but is used at least once a week on average, though it can go a few weeks during the summer without any use. I did wear out a set of tires on it about 15 years ago. The higher quality replacement tires are still good.

    The machine shop I worked in for 5 years during and after college had two bandsaws, a 36" metal cutting DoAll and a 24" Tannewitz we used for wood and aluminum. Neither were ever detensioned while I worked there, and I have no reason to believe they had ever been detensioned at any time prior or since.
    Last edited by Andrew Seemann; 02-24-2021 at 12:59 AM.

  9. #54
    Join Date
    Feb 2003
    Location
    Doylestown, PA
    Posts
    6,496
    I have a Rikon with a detensioning lever. I'm sure a shop where a bandsaw runs at least once every few days doesn't benefit from detensioning. I haven't turned my saw on for probably 3 months and it takes bout 2 seconds to tension/detension. I unplug and hang the cord over the detensioning handle, haven't started it detensioned yet.

  10. #55
    Join Date
    Feb 2008
    Location
    E TN, near Knoxville
    Posts
    10,613

    Tensioning reminder

    I don't see that I posted this in this thread, but for those who detension when planning not to use the saw for a while (as I do) here is an idea for a reminder to retension before turning the saw on. This is not original but I can't remember where I got the idea.

    This board hangs on the wall next to my saw.

    tension.jpg

    JKJ

  11. #56
    Join Date
    May 2009
    Location
    Wenatchee. Wa
    Posts
    437
    Reading through these threads I noticed that no-one ever mentioned that they had experienced flat spots or grooves on their bandsaw tires. Or perhaps as soon as they ran the machine they disappeared. Is it possible that the newer non rubber tires do not take a set and the old ones did? Might be another myth that needs to be laid to rest, kinda like the one about never laying a plane blade down on a wooden surface.
    (Sorry I could not help myself)

  12. #57
    Join Date
    Mar 2014
    Location
    Houston, TX
    Posts
    409
    I put one covering the on off switch and that worked great until a friend moved it and didn't read what it said, so I just leave it tensioned from now on.

  13. #58
    Join Date
    Apr 2020
    Location
    Tennessee
    Posts
    224
    Blog Entries
    1
    Iíve had this question as well. Iíve never de-tensioned my band saw. But I have wondered why the talk about releasing the tension.

    My Grizzly 16Ē bandsaw is nearly 20 years old and Iíve never had any noticeable affect from leaving it tensioned even after several years of not using it. It has the original tires on it as well.

    If my tires had degraded after 20 years Iíd think that is a normal degradation of rubber ďdry rotĒ. But that hasnít even happened. Also, I kept my blade way over tensioned until recently when a new blade came with an instruction sheet on proper tensioning. It is a lot less tension than I used to keep on it. I used to simply tighten it as tight as I could get it. There are no flat spots or other noticeable issues.

  14. #59
    Join Date
    Nov 2007
    Location
    NW Indiana
    Posts
    2,668
    I have two band saws and only detension when I run very small blades such as 3/16" or less.

  15. #60
    I remove the tension at the end of each work session. Jetís manual recommends it and I grew up being told to prolong the life of a spring by removing unnecessary tensio, e.g. never our pump guns loaded. My bandsaw works fine and Iíve never experienced failure when racking shells in our Remmington 870s. So take off the tension I saw.

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