Air impact wrench torque settnigs

Discussion in 'UK Motorcycles' started by Ace, Nov 19, 2006.

  1. Ace

    Ace Guest

    The torque wrench thread just there ^^^ reminds me of a question I've
    been meaning to ask. My recently-acquired "rattle gun" has settings
    from 1-4, which I assume equate in some way to torque settings.

    Anyone know if these are standard, or if not, how I'd work out which
    setting would be appropriate for tightening wheel nuts? I change the
    wheels on both our cars twice a year (summer/winter tyres) and usually
    just use the 'two grunts' approach to tightening them, but I'm
    concerned that the new tool might make it too easy to over-tighten.

    Ideas please.
    ..'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom)
    \`\ | /`/ GSX-R1000K3 (slightly broken, currently missing)
    `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
    Ace, Nov 19, 2006
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  2. Do something up with it on setting one, mark the position of the nut, undo
    with socket/spanner, re-torque to previous position with torque wrench set
    to ever increasing torques until you find the correct one. Set gun to number
    two etc. Compare torques for each setting against proper torque for wheel
    nuts to see which one's the same/similar.

    Mungo \Two Sheds\ Toadfoot, Nov 19, 2006
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  3. Ace

    Colin Irvine Guest

    Set to 1. Tighten a nut with it [1]. Apply torque wrench to get an
    idea of tightness. Repeat with other settings until satisfied.

    [1] Any old nut will do. Shame you haven't got any Thunderace owners
    visiting. The rear wheel nut would probably do fine!
    Colin Irvine, Nov 19, 2006

  4. which make is it , if its run by compressesed air then the pressure and
    bore of the airline will play a significant roll in the final torque
    the machine will apply

    The clarke one i use can go as high as 300 footpounds not the sought of
    torque you want to put on wheel nuts
    Steve Robinson, Nov 19, 2006
  5. Using the patented Mavis Beacon "Hunt&Peck" Technique, Ace
    Personally, I wouldn't use one for tightening wheel nuts. Spin them on
    with one, by all means, but I'd leave the final tweaking up as a manual

    Wicked Uncle Nigel - Podium Placed Ducati Race Engineer as featured in
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    SBS#39 OMF#6 Enfield 500 Curry House Racer "The Basmati Rice Burner",
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    Wicked Uncle Nigel, Nov 19, 2006
  6. Ace

    Hog Guest

    these should always be torque'd up correctly. If lacking the right tool,
    done up till they squeal with a nice long breaker bar!
    Hog, Nov 19, 2006
  7. Ace

    Ace Guest

    Well that's out of the question at the mo, what with the back still
    being unfit for duty. Hence the question.

    And no, I won't be lugging the wheels around - Jude can do that, but
    I'd rather do the wheel nuts myself, as I'm sure you'll understand.

    ..'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom)
    \`\ | /`/ GSX-R1000K3 (slightly broken, currently missing)
    `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
    Ace, Nov 19, 2006
  8. Ace

    Colin Irvine Guest

    With a big enough lever on the socket I'm sure she could check them.
    Colin Irvine, Nov 19, 2006
  9. Ace

    wessie Guest

    This is what I like to see when having tyres fitted. I'd probably avoid
    going back to a place that relied on the rattle gun to be set at the
    correct torque.
    wessie, Nov 19, 2006
  10. Ace

    Pete Fisher Guest

    Amen to that. In theory if correctly set they should be OK, but how
    often do you see Kwikfit adjust them. Innocent question: are all car
    wheel nuts supposed to be done to the same torque setting?

    | Pete Fisher at Home: |
    | Voxan Roadster Gilera Nordwest Yamaha WR250Z |
    | Gilera GFR Moto Morini 2C/375 |
    Pete Fisher, Nov 19, 2006
  11. Ace

    mb Guest

    On my last visit to the garage, to get new tyres on the car, they were
    using a torque wrench to tighten wheel nuts. I was a bit amazed.
    mb, Nov 19, 2006
  12. mb wrote
    I have seen it too in recent years, I presumed it was an H&S thing.
    steve auvache, Nov 19, 2006
  13. Ace

    Ace Guest

    Check them, perhaps, assuming I had any idea what setting they should
    be on in the first place.

    ..'_/_|_\_'. Ace (brucedotrogers a.t rochedotcom)
    \`\ | /`/ GSX-R1000K3 (slightly broken, currently missing)
    `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
    Ace, Nov 19, 2006
  14. Ace

    Dave Emerson Guest

    No, it depend on the wheel material, stud/bolt size and nut/bolt shape (flat
    or tapered).
    Dave Emerson, Nov 19, 2006
  15. Ace

    Hairy Arse Guest

    Theyre not really torque settings as youd get from a torque wrench, it's
    more of the ammount of hammer it gives the nut, 1 is a feeble tap, 4 is
    whacking it...

    i've never turned mine off number 4, might be too much for a car's wheel
    bolts as others mentioned,

    but it's no where near enough for my campers wheel bolts (those need
    something like 250 newton meters, or an 'average italian bloke jumping on
    the end of the 1 meter long wheel nut bar supplied with the vans tool kit'
    (that's roughly the translation from the handbook for the van... just
    mentions a bloke jumping on it, but it's an iveco hence italian, so i
    figured they ment a pavarotti style bloke as opposed to an ethiopian to do
    the jumping :)

    You can get torque bars for the rattle guns, you may see garages whacking
    your nuts on with the rattle gun <hmm..s&m garages>
    but they will usually have a coloured short extension bar between the rattle
    gun and the socket, that extension is a torsion bar, and twists a bit when a
    set torque is reached, and due to how the rattle gun worke... i.e hammering
    rather than directly spinning the nut, when the torque is reached the
    extension twists each time the gun tries to hammer the socker round more.

    Different coloured extension bars give different torque's, but you usually
    see the YTS kid going around afterwards with the torque wrench... kinda
    useless as to set the torque accurately you undoo the nut a bit then tighten
    it till the wrench clicks, just trying the nut with the wrench means it'll
    click at anything over the desired torque, so one nut could be at say 100NM,
    the other 150NM, and the yts lad thinks he's torqued the nuts to 90NM as he
    set the wrench to.
    Hairy Arse, Nov 19, 2006
  16. Ace

    Bod43 Guest

    Title: Air impact wrench torque settnigs
    Author: Ace

    Two + two = Doctor can't have screwed the back back together
    adequately! Spine clicking need spanner.

    Wheel nuts!!!

    Very mundane :-(

    Hope things are going good.

    If in doubt buy a torque wrench.

    On the other hand - I'd bet that a mechanically sympathetic
    person could do the job with an impact wrench in the
    same way as they would do it by hand. Whatever that is.

    I just "know" when the nuts are tight enough.
    I am not claiming extraordinary skills, I have travelled in
    many many vehicles where the wheels have been put on
    by hand and never though anything of it.

    The thing will whizz round then slow down. Then it
    will be tight enough.

    Bangining on and on at it until the machine
    refuses to move it at all will be too tight.

    Get a torque wrench and a BIG lever for the presumably
    low mass assistant - or one of the afformentioned
    impact wrench torque limiters.
    Bod43, Nov 19, 2006
  17. Ace

    Hog Guest

    Kwik Fit have had it as policy for at least 10 years
    Hog, Nov 20, 2006
  18. Ace

    Pip Guest

    Universal Tyres too, for at least as long. It'll be down to a
    combination of response to complaints about punters not being able to
    get their wheels off at the side of the road and the dangers of
    repeated overtightening (stretching studs/bolts, cracking nut/bolt
    Pip, Nov 20, 2006
  19. Ace

    Hog Guest

    That and newbies sending cars out with loose bolts. Lately in a KF a second
    bod checked them.
    Hog, Nov 20, 2006
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