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Not a heating problem, more like a machinist problem

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EBEBRATT-Ed
EBEBRATT-Ed Member Posts: 15,629
So I am trying to fix the depth adjustment on my Skillsaw because I can't adjust it. I had to pretty much completely disassemble the whole saw to get access to the depth adjustment knob.

After I cut the plastic knob off I am left with a threaded stud with a nut on it. Easy fix. All I need is a plastic insert nut or two nuts to lock together and I would be all set. No problem, right??

So the existing nut threads on and off the stud easily just as it should. No problem.

It looks like a 1/4-20 so I tried a 1/4-20 nut. No Good, won't thread on

It looks like a course thread but I tried a 1/4-28 fine thread nut. No Good

I tried a #12 nut. No good too small

The OD of the threads is .243-.244 with my micrometer

I went to the hardware store and got a 6mm metric nut..........too small

I also found a 7mm metric nut (which isn't even listed on most metric charts).......too big

I tried to run a 1/4-20 tap into the nut as a second check.....no good

1/4-28 tap .......no good

Again the existing nut threads on and off the stud easily... fits perfect!

I used to have some thread pitch gages gotta look for them

Skill"s website doesn't list the part separately and most parts for this saw are obsolete

Can't figure out what this is

I will probably just cut the stud off if I can and change it.

It's just such a simple thing...maybe that's why it's driving me nuts.

What else could it be??

Comments

  • neilc
    neilc Member Posts: 2,708
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    put it on the shelf over there,
    Skill saws are cheap,
    Xmas is coming.
    #obsolete
    known to beat dead horses
    kcoppSolid_Fuel_Man
  • Sailah
    Sailah Member Posts: 826
    edited November 2018
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    Unlikely metric with an OD of .243 as that translates to 6.19mm.

    1/4-20 is extremely common as a thread. Any chance it's an ACME thread? Common for height adjustment and distinguishable by its squared off thread.

    1/4"-16 is an acme thread and would look coarse

    ACME nut below for reference

    https://www.mcmaster.com/94815a007

    This also shows external major diameter pretty close to what you mic'd

    https://westportcorp.com/blogs/thread-plug-gages/external-acme-thread-general-purpose-size-chart
    Peter Owens
    SteamIQ
    Mike
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,629
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    @Sailah,

    That's a good idea, I will try an ACME nut. Threads don't look squared off at all but it's worth a shot
    Thank you
  • Gordy
    Gordy Member Posts: 9,546
    edited November 2018
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    Is this an actual skil saw? Worm drive, or side winder?
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,629
    edited November 2018
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    Cheap sidewinder m/n 5450 I think.

    And I checked not an ACME thread either...just weird
  • hot_rod
    hot_rod Member Posts: 22,262
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    got a pic?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream