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Nut blocks and anti backlash nut.

Discussion in 'General Talk' started by Christian James, Aug 13, 2018.

  1. Christian James

    Builder

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    Hi everyone,
    Does anyone know why the above blocks are counterbored at the back ? (Not the hex nut side).
    A 9mm diameter "counterbore" clamped on top of a 10mm diameter precision shim (or spacer) seems odd to me - only a half mm of plastic effectively bearing the clamping load.

    Thanks guys.
     
  2. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

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    There were some applications in the past where the screw head was recessed into the counterbore. Your question though does raise the issue of whether the counterbore is relevant going forward as it hasn't been used in quite some time and could be a detriment as you note.
     
  3. Christian James

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    Hi Rick, thanks for that!
    I did press a low profile screw into the counterbore and found it to be a perfect fit - but to what purpose? I really do think its poor engineering to mount something in the manner it's intended. In fact, I cannot see myself mounting the blocks at all (when I start my build) without some sort of spacing washer to fill the void or a full size 1mm plate across the back of the block.
     
  4. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    A short length of 3mm bar stock would probably make the best filler...
     

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