Wuben        
Results 1 to 20 of 20

Thread: QB2L and QB2L-X have different threads??

  1. #1

    Default QB2L and QB2L-X have different threads??

    So Iíve been on this 4sevens kick lately and I just bought a QB2L-X and the head of a QB2L thinking that they were interchangeable. Apparently they are not. QB2L just wonít thread on. It catches on for like a quarter of a turn but then binds. Another interesting thing is that the QB2L-X came with the older ď4sevens Quark 123^2 TurboĒ body. I donít really mind the difference in branding but Iím disappointed that they arenít interchangeable. Does anybody know which body, then, will fit the QB2L head?
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  2. #2
    Flashaholic* Hondo's Avatar
    Join Date
    Oct 2005
    Location
    SE Michigan
    Posts
    1,513

    Default Re: QB2L and QB2L-X have different threads??

    That's news to me. I thought all the QP/QT/QB threads were the same (new and old logos). Just that the body and tailcap had larger outside diameters on the Turbo models to match up with the bigger head, but they could still lego to the others with a step to the body. Lots of people like the QB tailcap on a QP or QT in order to get a flush forward clicky.

  3. #3

    Default Re: QB2L and QB2L-X have different threads??

    That's what I thought too, but I swear that the QB2L I have will not thread on to the X body that I have, and it doesn't look like it has any damage to the threads. Unless if I received some sort of prototype/pre production sample. I'll send a message out to the vendor that i bought it from. I just wanted to confirm that I wasn't misinformed about the interchangeability.

    And now that I look at it, the body I have is not an X body since the X body should say "Quark 123^2 TurboX" on it. Mine only says "Quark 123^2 Turbo".
    Last edited by badtziscool; 02-11-2019 at 02:18 PM.
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  4. #4

    Default Re: QB2L and QB2L-X have different threads??

    I don't remember the particulars, but I do remember purchasing an earlier body from the Foursevens part bin a few years back and it wouldn't thread onto the head I already had.

    ~ Chance

    Addendum: See post #10
    Last edited by Chauncey Gardiner; 02-12-2019 at 11:05 AM.
    Never point a flashlight at anything you don't intend to illuminate! Never buy a flashlight you have to make payments on.

  5. #5

    Default Re: QB2L and QB2L-X have different threads??

    Here's a link to a very informative thread. - #1

    ~ cG
    Never point a flashlight at anything you don't intend to illuminate! Never buy a flashlight you have to make payments on.

  6. #6

    Default Re: QB2L and QB2L-X have different threads??

    Hmmm. If that's the case, they must have made a threading change in the middle of a product cycle? I would have expected the change to happen when they did the overhaul of their products' naming convention, and not otherwise. I don't think the anno would introduce this much interference with the threads. This is a hard stop when I try to thread them together.

    Thanks for the reference Chance. I've been reading through that trying to figure out my issue.




    Quote Originally Posted by Chauncey Gardiner View Post
    I don't remember the particulars, but I do remember purchasing an earlier body from the Foursevens part bin a few years back and it wouldn't thread onto the head I already had. Sometime along the way the thread pattern was changed.

    ~ Chance

    Addendum: Perhaps the issue had to do with the body threads being anodized. Sorry, I just can't remember.
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  7. #7
    Flashaholic Jose Marin's Avatar
    Join Date
    Jan 2015
    Location
    St. Louis
    Posts
    492

    Default Re: QB2L and QB2L-X have different threads??

    I bought a few of the older bodies/ qb2l heads/ qb2a heads from the foursevens deal section a long time ago and had the same problem you had. I decided to just go for it and kept tightening harder and then it went on. Its like the threads just needed to straigtned or something i dont know.
    Granny shiftin not double clutchin like you should

    Wanted: quark 18650 body and malkoff wildcat v5 5000k mtg2 head

  8. #8

    Default Re: QB2L and QB2L-X have different threads??

    In any other case I would have said youíve cross threaded the threads, but now Iím wondering. So after that the head screwed on and off of other bodies with no issues? Threads looked fine and not mangled? Maybe theres a way for me to measure the pitch of the threads or maybe try to inspect the head to see if there is some obstruction.

    Quote Originally Posted by Jose Marin View Post
    I bought a few of the older bodies/ qb2l heads/ qb2a heads from the foursevens deal section a long time ago and had the same problem you had. I decided to just go for it and kept tightening harder and then it went on. Its like the threads just needed to straigtned or something i dont know.
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  9. #9

    Default Re: QB2L and QB2L-X have different threads??

    Well, I followed in you footsteps and went for it. And guess what. It WORKED! It took about the same force as opening a jar of tomatoe sauce but it went on. I guess the tolerance of the threads were a little too tight and so it did indeed bind but a bit of force made them comply. And Iím happy to say that the threading action on the QB2L-X still feels just fine.

    Im surprised the machining of the threads were that off spec.

    Quote Originally Posted by Jose Marin View Post
    I bought a few of the older bodies/ qb2l heads/ qb2a heads from the foursevens deal section a long time ago and had the same problem you had. I decided to just go for it and kept tightening harder and then it went on. Its like the threads just needed to straigtned or something i dont know.
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  10. #10

    Default Re: QB2L and QB2L-X have different threads??

    T. J. aka Kingofsoles24 on eBay, (a great source for Foursevens lights & parts ) e-mailed that the parts are indeed interchangeable. He stated that the threads must have been a little off.

    Disregard my post concerning any thread changes being made from older to newer Foursevens lights.

    ~ Chance
    Never point a flashlight at anything you don't intend to illuminate! Never buy a flashlight you have to make payments on.

  11. #11

    Default Re: QB2L and QB2L-X have different threads??

    Quote Originally Posted by Chauncey Gardiner View Post
    T. J. aka Kingofsoles24 on eBay, (a great source for Foursevens lights & parts ) e-mailed that the parts are indeed interchangeable. He stated that the threads must have been a little off.

    Disregard my post concerning any thread changes being made from older to newer Foursevens lights.

    ~ Chance
    Indeed he is. If not for him, I wouldn't have acquired as many 47 items that I have already. But thanks for helping me solve my issue Chance. And thanks to all of the others who chimed in with their inputs.

    With a working 123^2 Turbo/QB2L in hand, I'm now wondering why I never got into 47s more in the past. It's so refreshing to handle this light.
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  12. #12

    Default Re: QB2L and QB2L-X have different threads??

    In the future I'll wait for Jose and Hondo to chime in. They offered the suggestion and knowledge that proved useful.

    One of the features I like most in older 4Sevens offerings is the rotate head to switch between mode groups.

    badtziscool, Welcome to the club, bud.

    ~ Chance
    Never point a flashlight at anything you don't intend to illuminate! Never buy a flashlight you have to make payments on.

  13. #13
    A&Q Moderator
    Woods Walker's Avatar
    Join Date
    Jun 2008
    Location
    New England woods.
    Posts
    5,395

    Default Re: QB2L and QB2L-X have different threads??

    I had thread compatibility issues with the 2AA twisty Mini lights but not others.
    The TK20. Yes it still rocks.

  14. #14
    Flashaholic* Got Lumens?'s Avatar
    Join Date
    Mar 2011
    Location
    Champlain Valley
    Posts
    1,768

    Default Re: QB2L and QB2L-X have different threads??

    It could be due to the anno coating being applied too thick at the bottom of the thread groove. It could also be one made just before a tooling change with a worn cutter. I have seen anno done over a not totally clean part. I looked like freckles in the anno. smoothed them out by scratching then with a utility blade. Does it bind on one of the newer bodies that doesn't have anno on the threads?
    Last edited by Got Lumens?; 03-07-2019 at 02:04 PM.

  15. #15

    Default Re: QB2L and QB2L-X have different threads??

    Quote Originally Posted by Got Lumens? View Post
    It could be due to the anno coating being applied too thick at the bottom of the thread groove. It could also be one made just before a tooling change with a worn cutter. I have seen anno done over a not totally clean part. I looked like freckles in the anno. smoothed them out by scratching then with a utility blade. Does it bind on one of the newer bodies that doesn't have anno on the threads?
    That very well could be the case. Not sure if you saw my earlier post, but I eventually got it to work by just forcing it on. It would make sense that it could have been from a tooling change or the extra thickness from the anodizing. Unfortunately, I didn't have a newer body to try it on, but I didn't really consider the possibility of some variation between new body vs old body because the old body worked on the QB2L-X head.
    Who needs to see the light at the end of the tunnel when you have friends on CPF?
    My flashlight videos: http://www.youtube.com/playlist?list...9TIYcGeuBXa5m0

  16. #16
    Flashaholic*
    Join Date
    Nov 2007
    Location
    California, Los Angeles
    Posts
    1,773

    Default Re: QB2L and QB2L-X have different threads??

    Anyone know a 26650 body that fits a quark?

  17. #17

    Default Re: QB2L and QB2L-X have different threads??

    Quote Originally Posted by dealgrabber2002 View Post
    Anyone know a 26650 body that fits a quark?

    The Maelstrom X10 will.





    ~ Chance

    Never point a flashlight at anything you don't intend to illuminate! Never buy a flashlight you have to make payments on.

  18. #18
    Flashaholic* Got Lumens?'s Avatar
    Join Date
    Mar 2011
    Location
    Champlain Valley
    Posts
    1,768

    Default Re: QB2L and QB2L-X have different threads??

    Quote Originally Posted by Chauncey Gardiner View Post
    The Maelstrom X10 will.
    ~ Chance
    Too Funny

  19. #19
    Flashaholic* Got Lumens?'s Avatar
    Join Date
    Mar 2011
    Location
    Champlain Valley
    Posts
    1,768

    Default Re: QB2L and QB2L-X have different threads??

    Quote Originally Posted by dealgrabber2002 View Post
    Anyone know a 26650 body that fits a quark?
    There are none that I'm aware of. This would pose the same problem as the original 18650 tubes had. It becomes unreliably complex to engineer an upsize and down size of threads to accommodate the diameter of the Quark's Head and Body to a larger battery tube. Such a design induces points of possible failure into the assembly with necessary hardware and added Battery circuit contact points between the Switch, Battery, and Head.

  20. #20

    Default Re: QB2L and QB2L-X have different threads??

    Quote Originally Posted by Got Lumens? View Post
    There are none that I'm aware of. This would pose the same problem as the original 18650 tubes had. It becomes unreliably complex to engineer an upsize and down size of threads to accommodate the diameter of the Quark's Head and Body to a larger battery tube. Such a design induces points of possible failure into the assembly with necessary hardware and added Battery circuit contact points between the Switch, Battery, and Head.
    I just found this - Quark 18650 Tube Assembly photos An excellent primer on the subject at hand.

    ~ Cg
    Never point a flashlight at anything you don't intend to illuminate! Never buy a flashlight you have to make payments on.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •