Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    Yes there is the possibility that the shear plane is thro the threads which effects the cross section! I use the term loose, as to imply a simple shear effect rather than overcoming the friction force of the two plates clamped andd then the effect in shear.
  2. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    I have had to assume a couple of things, I hope to get these calcs done out by someone qualifed. I agree that the tensile load on the bolts is pretty much naff all, and I have assumed that acc=decel. Yeah the inertia was a typo. Thnaks again for all your help!!
  3. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    Hello all, Thanks for all the imput, all looking good. As this is on a CNC lathe, we have a degree of collision control, and so feel that this isnt a problem. Also the customer feels that this is the worse case if the E-stop is used. DesertFox- I dont think the C of G is relevent in this...
  4. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    The decelaration is 12 seconds from 2500 rpm. Hope this helps.
  5. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    Ok Heres the pickies, and my initial calcs. I'm not degree graduate, so dont be too harsh!! The customer is just concerned about the shear forces acting on the bolts and drive dogs when a machine E-Stop is used. We are waiting on a decelaration value...
  6. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    Ok if we assume we have a time in seconds for the decelaration, wich we are getting from the machine tool comapny, and I have calculated the energy in joules for the rotating mass, how do i go about it from here? Any help would be great.
  7. NewAtThis

    Shear on bolts for a Decelarating rotating mass

    Hello all, I have been asked to check some details for our customer. We have an adapter on the spindle nose of a lathe, at a mass of around 335kg being held in place with 4 X M24 bolts and a drive dog. The mass is rotating at 3300rpm. I want to check the force acting upon the bolts if the...
  8. NewAtThis

    WBlock has duplicate Atributes

    Sorry I should have tested before posting. The problem was with my attributes being on verify, turned it off and all is good now!!
  9. NewAtThis

    WBlock has duplicate Atributes

    Hello all, I've not long started at my new company, and I'm trying to sort out drawing borders. I'm working on ACad 2004LT. I have drawn the border and created the attributes in the correct order I want them, I have created the block with WBLOCK, selected the objects, selected as unit less...

Part and Inventory Search

Back
Top