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Changing Marina PCD to Minor PCD
Posted: Fri Oct 03, 2025 6:37 am
by glokkk
Hello from Australia. Can anyone advise me how to change the Marina disc brake hubs & studs to Morris Minor studs @ 4" PCD? I have access to a lathe and milling machine and would appreciate any advice on how to go about modifying the hubs. I am assuming some of you learned associates may have been down this path. Thank you in advance
Re: Changing Marina PCD to Minor PCD
Posted: Fri Oct 03, 2025 8:48 am
by philthehill
If you have a milling machine with an indexing head you are nearly there.
The Marina studs are removed and the stud hole drilled to accept a top hat insert. The top hat insert is placed into the hole from the rear of the hub. The hole for the revised PCD is drilled in the top hat insert using the index head to determine the new 4" PCD. You can use the Marina wheel studs.
See photos below of the revised Mr Grumpys Marina hub fitted with the top hat inserts and Marina studs from which you should be able to work out what is required.
- Grumpy hub 1.jpg (51.5 KiB) Viewed 1874 times
- Grumpy hub 2.jpg (59 KiB) Viewed 1874 times
Re: Changing Marina PCD to Minor PCD
Posted: Sat Oct 04, 2025 7:45 pm
by glokkk
Brilliant ! Thank you (so much
Re: Changing Marina PCD to Minor PCD
Posted: Sat Oct 04, 2025 8:10 pm
by glokkk
Phil, what size top hat insert would you recommend? I note that there are numerous sizes available on-line.
Re: Changing Marina PCD to Minor PCD
Posted: Mon Oct 06, 2025 8:57 pm
by glokkk
All sorted Phil, not to worry
