SOHC.co.uk Forums > CB500/550

Stuck screw in clutch cover

<< < (4/7) > >>

Oddjob:
Something wrong there Alez, far too much thread showing, it may have been really badly cross threaded and that's why it was so locked.

Should have tried heat at the same time as the grips, most things will move that way.

alexdecker:

--- Quote from: Oddjob on February 08, 2022, 06:40:46 PM ---Something wrong there Alez, far too much thread showing, it may have been really badly cross threaded and that's why it was so locked.

Should have tried heat at the same time as the grips, most things will move that way.

--- End quote ---

Oh I did, I really did. I blasted it with fire. It just kept its place. Not sure what to do now though… actually never tried a screw that sat in there so tight and seized up.

Oddjob:
You can try and drill it out but it will probably end up needing an helicoil or something similar.

sye:
Spark erosion will work. Search to see if there's anywhere near you.

Alternatively, a good welder may be able to weld a bolt onto what's left?

philward:
I think if its stuck in that bad, welding anything will just end up with the same situation as before.
I think your only option is drilling it out. You need a good flat surface to drill and the key is a good central starting point - use a spring loaded centre punch to punch dead centre of the screw. Use a good quality Colbalt drill in a variable speed drill, starting at 3mm going up to the 6mm tapping size (5.0mm).
To reiterate, the key is drilling central and square as if you are off centre, the drill will go to the softest material and vere towards and grip into the alloy case.
Going straight to the helicoil option gives you more tolerence as you will drill the entire screw out when using the helicoil tapping size drill - you have more tolerence in being slighly off centre. Always good to have an M6 Helicoil kit in your tool kit as it will always come in handy.
Don't get too down about it Alex, we have all been there.
Maybe worth looking on Youtube to see the helicoiing process to give you confidence
Hope that helps

Navigation

[0] Message Index

[#] Next page

[*] Previous page