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Recent content by wannadie

  1. wannadie

    Tightening bolts to 90% yield stress.

    A few comments: If the bolted joint was loaded in shear with shear service loads I see no reason why the preload would be less significant. The preload is providing the clamping force, this is creating a 'friction joint' resisting shear forces being transmitted to the fastner. It is alright...
  2. wannadie

    Tightening bolts to 90% yield stress.

    When tightening a bolt, I have read that I should tighten to provide preload of the order to 90% of the yield stress in the fastener. I understand the importance of preload, but find the 90% extremely high with little safety factor due to the unpredictable nature of coefficient of friction and...
  3. wannadie

    Schematics

    What packages do people use to draw fastener scematics suitable for reports? Cheers, Matt.
  4. wannadie

    Laser Cutting

    I am trying to find an alternative to machining a slot through a steel nut using a slot mill. Can anyone tell me if this would be possible to achieve using laser cutting, and point me in the direction of equipment that may be capable of this. The nut is M16, 24mm accross flats. I need to find...
  5. wannadie

    Report Schematics

    What programs do people find the most useful for drawing schematics report / publishing standard? Thanks, Matt.
  6. wannadie

    Nut Steel ISO898

    What are the differences between ISO 898-1 grade 8.8 bolt steel and ISO 898-2 grade 8 nut steel?
  7. wannadie

    Micro Fasteners

    Can anyone help me find companies where I can get quotes for micro diameter screws. I am specifically after thread forming screws with diameters below 2mm. Thanks, Matt.

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