Home > Maintenance & Modifications > Attaching Chequerplate? |
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Grouse Member Since: 16 Apr 2012 Location: on the hill Posts: 512 |
Counter sinking bit and either stainless steel counter sunk bolts or I just used pop rivets
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28th Oct 2019 3:42am |
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blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16812 |
You need a piloted couterbore for this, something like this: https://uk.farnell.com/ruko/102411/counterbore-hss-m6/dp/282390 The pilot fits the predrilled 6mm hole, and the counterboring face (in effect an end mill) then cuts a flat surface. Typically these are used to enable fasterners such as socket head capscrews to be recessed with flush heads. If using one on something as thin as CP, you may need to have a thicker substrate to guide the pilot. It is also a little tricky to prevent "chatter" if using a counterbore in a hand-held tool, they are designed for machine tools, but it can be done with care. The best result would be if you could use a drill press (I am assuming that you don't have a milling machine because you probably wouldn't be asking the question if you did). |
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28th Oct 2019 9:08am |
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rockster57 Member Since: 15 Nov 2014 Location: West Yorkshire Posts: 937 |
Thank you for the information guys.
Blackwolf I've gone with your suggestion and ordered a counterbore. |
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28th Oct 2019 2:50pm |
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blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16812 |
Practice before using it on your CP!
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28th Oct 2019 8:10pm |
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BogMonster Member Since: 05 Feb 2008 Location: Stanley Posts: 389 |
Genuine chequer plate wing tops come with countersunk allen-head bolts and small nyloc nuts for the inside of the wing. Looks MUCH nicer than rivets if you care about that sort of thing! ---
2006 Defender 110 SW 300Tdi • 2011 Ford Ranger XLT crewcab • 2015 Defender 110 Station Wagon Utility TDCi |
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29th Oct 2019 9:36am |
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Balvaig Member Since: 19 Feb 2016 Location: Fife Posts: 719 |
As you are going to all this trouble, why not but a cheap pillar drill. Only about £50 for the bottom of the range.
My experience of drilling out existing holes by hand has been a disaster in terms of appearance of the hole. I doubt you will be happy with the result given your comments. |
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29th Oct 2019 10:38am |
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rockster57 Member Since: 15 Nov 2014 Location: West Yorkshire Posts: 937 |
I most certainly do. Rivetting quick, easy and cheap but there is something more satisfying about using quality fasteners. |
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29th Oct 2019 11:16am |
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rockster57 Member Since: 15 Nov 2014 Location: West Yorkshire Posts: 937 |
I have one BM. And intend to take that advice thank you. All the existing holes are around the perimeter of the CP so will be easily accessible using the pillar drill. |
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29th Oct 2019 11:18am |
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rockster57 Member Since: 15 Nov 2014 Location: West Yorkshire Posts: 937 |
I'm too easily tempted to crack on and get the result so this is very sensible advice. Thanks Blackwolf. And thank you everyone for your input. You guys are great. This is such a friendly helpful community with people only too willing to go to the time and trouble to share their knowledge and expertise! It's good to feel I'm a part of it. |
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29th Oct 2019 11:23am |
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Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018 |
What fasteners are you using? I would have thought that the counterbore linked would need a fastener with a very very shallow head to achieve a flush fit in 3mm chequer plate. Interested to know if such exists. |
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29th Oct 2019 5:52pm |
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rockster57 Member Since: 15 Nov 2014 Location: West Yorkshire Posts: 937 |
With the CP being used and had previous rivets drilled out, some of the mounting holes are enlarged. Because of this I feel there is insufficient substrate for conventional size CSK fasteners. My plan is to use the smallest domed CSK solid cup washer I can get away with along with CSK flat head blackened SS torx screws. Unfortunately these of course will sit proud of the surface but for me that’s an acceptable compromise considering the bargain basement secondhand panels.
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29th Oct 2019 9:54pm |
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Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018 |
Sounds good to me.
Interested to see a photo or two when you have got it done. |
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29th Oct 2019 10:22pm |
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