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Hubcap threads
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Hubcap threads
Can someone please confirm the thread size for the hubcaps please? I believe they are M20x1.5.
I have found that when trying to fit the caps to the wheel assembly they bind up hard halfway down requiring a pair of stilsons to remove them again. So I think that I will need to clear the treads with a suitable tap.
I have found that when trying to fit the caps to the wheel assembly they bind up hard halfway down requiring a pair of stilsons to remove them again. So I think that I will need to clear the treads with a suitable tap.
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Re: Hubcap threads
Hi Philip, aluminium on aluminium "picks up" real bad , use a rotary wire brush and buff the hell out of the male thread, Then use a light oil to lubricate and they should screw in just fine using only your fingers. If you have damaged the thread then you may have to tap the female. ![Cool 8)](./images/smilies/icon_cool.gif)
![Cool 8)](./images/smilies/icon_cool.gif)
Mechanical engineer.
2 Youtube channels, Phil Woollard and Magpiespyro. Facebook/ Phil Woollard.
Commission builds considered. Pm for my email.
2 Youtube channels, Phil Woollard and Magpiespyro. Facebook/ Phil Woollard.
Commission builds considered. Pm for my email.
- Armortek
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Re: Hubcap threads
Good advise above from Phil.
The thread on CK0209 is M22 x 1.5 (fine pitch)
The thread on CK0209 is M22 x 1.5 (fine pitch)
Armortek
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Re: Hubcap threads
I keep a set of taps on the bench and chase a lot of threads.
They come from the factory very nice... but it only takes a sliver to gall Aluminum. And there are chips here and there to be found...
Also, having compressed air at the bench is a great idea. If you don't have a compressor or an air line, you can get a small "Air Tanks" from the auto parts store for short $$. Fill it with 80 LBS of air and it will run an air chuck (blower) for days... Blowing out the holes is a good idea!
But hard to beat running a tap down holes just because.
Cheers,
RPR
They come from the factory very nice... but it only takes a sliver to gall Aluminum. And there are chips here and there to be found...
Also, having compressed air at the bench is a great idea. If you don't have a compressor or an air line, you can get a small "Air Tanks" from the auto parts store for short $$. Fill it with 80 LBS of air and it will run an air chuck (blower) for days... Blowing out the holes is a good idea!
But hard to beat running a tap down holes just because.
Cheers,
RPR
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Re: Hubcap threads
I have cleaned all the hubcap parts, wire brushed them on a lathe, scrapped out the threads, oiled the threads, copper greased the threads and blown them out with compressed air. Despite all this I just cannot get the caps to close within 2/3 mm of the back plates when tightening firmly by hand. Is this gap ok or is there more I can do? I don’t possess taps and dies of this size.
Many thanks
Many thanks
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Re: Hubcap threads
I've not yet got into my KT kit however depending on how the hubcap thread is made, assuming there's a flange, the thread may be cut without a relief cut and it won't cinch up tight as the thread ends. If that is the case you could, very carefully, use your lath to cut a very thin relief cut just in front of the flange. That would allow the hubcap to tighten completely.
Jerry
Jerry
http://tanks.linite.com/ - RC tanks: stay home, build a tank and save a life!
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- Jerry Carducci
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Re: Hubcap threads
Either they forced it, didn't have the problem or did and just left it. I've found the latter more often than not but like you I don't like it. On the 88 I'm rebuilding several parts that should tighten without gaps needed relief cuts (or rebate cuts - the technical term slips my mind).
I suppose one cut cut a relief on the female side but without a way of re-cutting the thread I'd shy away from suggesting that one.
Jerry
http://tanks.linite.com/ - RC tanks: stay home, build a tank and save a life!
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Re: Hubcap threads
I should have called it an undercut.
This should be able to explain it better than I could.
Undercut
Jerry
This should be able to explain it better than I could.
Undercut
Jerry
http://tanks.linite.com/ - RC tanks: stay home, build a tank and save a life!
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Re: Hubcap threads
Jerry
Many thanks for your assistance.
I’ve neither the skills or the nerve for that solution. I have cleaned all the threads, wire brushes them all, scrapped out every millimetre of thread with a very small file, I’ve deburred the back plate thread, blown them
out with compressed air and oiled all the threads. All of them tighten up a little over 1 mm short of the back plates when tightened by hand. I’ve no idea if this is by design or not or what will happen when I put the grips on them but I can see no choice but to leave them. Should I be using Loctite for these parts? It doesn’t say so in the instructions but I can’t see why not.
Many thanks for your assistance.
I’ve neither the skills or the nerve for that solution. I have cleaned all the threads, wire brushes them all, scrapped out every millimetre of thread with a very small file, I’ve deburred the back plate thread, blown them
out with compressed air and oiled all the threads. All of them tighten up a little over 1 mm short of the back plates when tightened by hand. I’ve no idea if this is by design or not or what will happen when I put the grips on them but I can see no choice but to leave them. Should I be using Loctite for these parts? It doesn’t say so in the instructions but I can’t see why not.