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How to cut screws to length?

Discussion in 'General DIY' started by StartAgain, 28 Jun 2020.

  1. StartAgain

    StartAgain

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    Hello,

    I think this must be very basic but I'm not sure of the best way to do it.

    I'm trying to install a dog flap and need to cut the screws to length and then put a bolt on them so the threads need to be even.

    I've tried using a hacksaw which cut it to the right length but it was too "rough" for the bolt to go over it. After (more than I'm willing to admit!) reasearch, it seems a metal file could do the job - but I'm not sure which type or size would be best?

    Any help would be greatly appreciated - it's been over a week now and I want to get the dogflap finished!

    Thanks.;
     
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  3. bernardgreen

    bernardgreen

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    Put a nut on the screw before you cut it. Then when the screw has been cut remove the nut and it will to some extent "clean up" the thread at the cut.
     
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  4. big-all

    big-all

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    if its a small screw you can"lock nut" and fix in a vice or workmate to hacksaw off
    lock nut is two nuts wound against each other to stop the bolt rotating during cutting
     
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  5. Mottie

    Mottie

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    As Bernard said but I’d round/clean the end up before removing the nut and watch your fingers - it’ll be bloody sharp.
     
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  6. StartAgain

    StartAgain

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  7. delmel

    delmel

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  9. mattylad

    mattylad

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    As the others mention lock nuts, put 3 nuts on.
    2 to be used locked and held by a vice, the third used to re-thread the end you have cut and filed down.

    Or just buy the right sized screws.
     
  10. Nozzle

    Nozzle

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    Use a file to clean up before winding the nut back

    Nozzle
     
  11. foxhole

    foxhole

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    I clean up the end on desktop grinder or belt sander .
     
  12. big-all

    big-all

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    i often use a battery drill and a bit off sandpaper choose low speed on the bolt head and rotate on sandpaper at constantly moving but that wont work on other than 6mm bolts
    its better to champher and sand before removal off nuts
    if you have nothing like emery or sand paper you can use concrete brick or slab as a rubbing surface but it will ruin the finish so dont use any surface you need to look at
     
  13. cleggy

    cleggy

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    just buy a correct size nut and bolt for the job.you can get any size you want or need.Why cut it and mess about
     
  14. Harry Bloomfield

    Harry Bloomfield

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