2.5mm 1/4" square drive torque wrench bit

Tjm208
Tjm208 Posts: 14
edited June 2016 in Workshop
Hi all,

I'm looking for a 2.5mm allen key bit for my BBB torque wrench (http://bbbcycling.com/accessories/tool-boxes/BTL-73). It has a 1/4" square drive. So far the best solution I've found involves buying 2 different kits, one of which has a 1/4 square to hex adaptor, and the other of which has a 2.5mm hex bit, but I'm hoping someone has spotted one bit or at least kit that will do the job?

Thanks,

Comments

  • dgunthor
    dgunthor Posts: 644
    your local RS components store:

    http://uk.rs-online.com/web/p/products/8756782/
  • photonic69
    photonic69 Posts: 2,896
    What are you torquing with a 2.5mm bit? It can't be anything too tight at that size. Are you sure your torque wrench is accurate at that end of the scale? I'd just go finger tight with that size fastenings.


    Sometimes. Maybe. Possibly.

  • Tjm208
    Tjm208 Posts: 14
    dgunthor wrote:

    Thanks, but it needs to have a female end to accept the torque wrench... I could get this one with a square drive adaptor though possibly
  • Tjm208
    Tjm208 Posts: 14
    PhotoNic69 wrote:
    What are you torquing with a 2.5mm bit? It can't be anything too tight at that size. Are you sure your torque wrench is accurate at that end of the scale? I'd just go finger tight with that size fastenings.

    Adjustment cone on a hub... No you're right actually, lower limit is 2nm and I need 1.1nm. Firm but not ridiculously so using the short end of the allen key as the lever sound about right?
  • photonic69
    photonic69 Posts: 2,896
    1.1Nm is about 370 grams of force 30cm away from the axis which is about 1 tin of beans (420grams) about 25cm away. If you can imagine that then you'll be in the right ball park. :-)


    Sometimes. Maybe. Possibly.

  • Tjm208
    Tjm208 Posts: 14
    Thanks!