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Thread: Delta DP Trunnion Fail - Update

  1. #1
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    Delta DP Trunnion Fail - Update

    I blame Rob . Just when I posted in his 'DP Quest' thread about how much I like the Delta woodworking DP table design and how much I use it, it fails!

    Here's the general design that allows the table to tilt forward and back. the second shot shows the minor fail on the left trunnion.

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    Here is the total fail of the right trunnion block.

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    Now before my dad starts telling you how I tend to tighten things like a gorilla [let's all remember he broke his banjo of his lathe ] despite my 5'-10" 175lb frame, let me show you the size of the handles they provide for torquing this thing down. The table is quite beefy at about 25lbs. The handles look and feel like they are designed to allow an easy tightening . . . maybe too easy.

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    You can see the design flaw. The locking block rides on a couple of "blades" that set in a couple of grooves in the trunnion. There is, however, no limiting mechanism designed into the casting which allows the resulting energy from the torque to focus at the bolt head.

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    This was one of maybe two redeeming characteristics of this DP. I don't know if parts are available but, I will try to get them and modify it to be less destruct prone if possible. Those of you with similar table designs, Delta or not, may want to take a look under the hood before things go south.

    A few minutes later . . . .

    Well, that figures:

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    I'll try elsewhere.

    A few minutes later still . . . .

    ereplacementparts usually has everything but . . .

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    I found them here. We'll see if they actually show up
    Last edited by glenn bradley; 04-16-2014 at 07:14 PM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  2. #2
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    Bummer ....Rob hit his so hard with that mallet, the resulting vibrations are surely the cause of yours letting go
    Hope you find an ea$y fix!
    The perception of perfection is perfectly clear to everyone else

  3. #3
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    I would take the one that is cracked to a local machinist and have a pair of them made from steel. That isn't a place for a cast pot metal or aluminum part.
    I'm supposed to respect my elders, but its getting harder and harder for me to find one now.

  4. #4
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    Obsolete, eh?

    Did maybe delta redesign them for this very reason? I wonder if there's a recall -- maybe you can get delta to replace 'em on their dime?
    Jason Beam
    Sacramento, CA

  5. #5
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    Oh boy my apologies Glenn for the "negative vibes man". (Oddball aka Donald Sutherland ..Kellys Hero's) .

    Delta pot metal what can i say. I agree with Charles, thats the wrong place to use cast ally.

    Those trunion adjustments remind me of my table on my Delta Bandsaw uses the same kind of method if not the same part.

    Here is my saw diagrams check out the table http://www.ereplacementparts.com/del...3481_3494.html

    here is the shoe they have on the trunnions for the bandsaw table looks the same to me.

    http://www.ereplacementparts.com/cla...e-p-84680.html


    I thought this was a relatively new model drill press. What i read about it on amazon and the quality makes me think they picked the wrong taichi suppliers to make it.

    Pretty hi tag price but lots of nice features by the looks of it.

    Hope you get things sorted Glenn.
    cheers

  6. #6
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    Yikes. Now I'm afraid to look.

  7. #7
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    I believe a steel clamp shoe might be too much for the pot metal cast trunnions . I found them for about $3 each and so ordered them. I may make a better version out of white oak or ash if I cannot modify the original to be more regulating. The design almost assures failure after some years of use. I suppose if you never used the feature that they bragged on so much when this DP came out, you wouldn't have a problem. I would have a hard time going back to a table that only tilted left to right.
    Last edited by glenn bradley; 04-01-2014 at 02:37 AM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  8. #8
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    Glenn,
    Those trunnions look like the same ones used on Delta's 14" bandsaw. If that's the case, you ought to be able to find them in nearly everyone's bandsaw parts catalog.

    I know the bandsaw trunnions pretty much interchange between all the brands. I have Delta trunnions on my TaiChi saw. If all else fails, take a look at the Grizzley G0555 parts list.
    Jim D.
    Adapt, Improvise, Overcome!

  9. #9
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    Quote Originally Posted by Jim DeLaney View Post
    Glenn,
    Those trunnions look like the same ones used on Delta's 14" bandsaw. If that's the case, you ought to be able to find them in nearly everyone's bandsaw parts catalog.

    I know the bandsaw trunnions pretty much interchange between all the brands. I have Delta trunnions on my TaiChi saw. If all else fails, take a look at the Grizzley G0555 parts list.
    Very similar but, the part # doesn't cross reference (that doesn't mean much though). They are a match for all these:


    • Emglo 5140029-82
    • DeWALT 5140029-82
    • Devilbiss Air Power 5140029-82
    • Delta 5140029-82
    • Black and Decker 5140029-82
    • Biesmeyer 5140029-82
    • Porter Cable 5140029-82


    I have been looking at the one that is only cracked and feel quite confident that I can come up with a preventative modification. If I succeed I will post it as these same parts are on the 17-950 and the 17-959 so maybe it will help some folks if I am successful..
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  10. #10
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    I juts posted in Rob's thread about how much I like my Delta and then I read this thread, I hope mine is not going to fail now.
    Earl

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