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Thread: Loctite choices
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29th Jul 2016, 03:36 AM #1Diamond Member
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Loctite choices
I need to make a steel adapter to carry an oil seal and fit it into the tube of a diff housing. The adaptor will be 2.75" OD x .25" thick, and its located in the axle tube by a shoulder.
I want to make the adapter a slip fit /tap fit in the bore, but no tighter than that, and use loctite to both hold it in position and seal the minimal gap between the adaptor and housing. There will be almost zero forces on the adaptor.
I've been doing the reading, I have zero loctite experience, and I'm thinking that 641 would be the right one to use for this situation, plus it seems to be readily available. Any thoughts?
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29th Jul 2016, 07:52 AM #2Philomath in training
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I think you are probably right in your selection.
Michael
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29th Jul 2016, 08:14 AM #3Diamond Member
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That loctite should work fine.
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29th Jul 2016, 10:37 AM #4Intermediate Member
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If you have never used Loctite before, take the time to read the instructions and then do EXACTLY what they say. Loctite sometimes gets a bad response from people who don't read the instructions!!!!
cheers
Bill
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4th Aug 2016, 03:05 AM #5Diamond Member
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Thanks guys, the loctite seems to have worked well. I needed a work around to replace the 2.75" OD inner axle seals (specials, no longer available) on my 1935 Hudson project. Made 2 adaptors to take readily available modern 2" OD seals.
Simple adaptors
Adaptor glued into the axle tube
Seal fitted to the adaptor. Job done. I love having a lathe.
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4th Aug 2016, 09:40 AM #6Golden Member
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Hi Bob,
A good outcome to your seal problem, I all ways enjoy your posts on your 1935 Hudson rebuild and am looking forward to seeing the finished project. Rebuilding old cars is like the old expression "a bit like eating an Elephant, one little bite at a time". I did a rebuild on my old car back in 1977, it is a Mercedes 300 sedan so I understand the issues involved. A couple of pictures of the 300.
Bob
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16th Aug 2016, 09:30 AM #7Diamond Member
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18th Aug 2016, 08:47 PM #8Senior Member
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Good idea with the boiling water. I had a big lead screw I wanted to degrease. The grease was really thick and sticky. I started with petrol and a toothbrush but gave up because it was going to take forever and was incredibly messy. Im lucky to have a 4000 psi pressure washer with deisel burner which goes to 90C. Couldnt get over how easy it was. Its a bit of hassle to set it up but so easy to get rid of the grease I think I'll be using it for fairly small stuff too.
Ive made a 50 x3mm brass thread insert for a big nut. I dont want it to come out and was looking for permanent locktite for large nuts. I couldnt find any so i used normal permanent locktite, well, permatex stuff anyway. I put a lockscrew into the insert from the side as well so its not going anywhere if the locktite fails.. Is the large nut locktite different because its designed to take up bigger gaps? My 50mm thread was a very good fit so there was no large gap.
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19th Aug 2016, 09:11 PM #9Diamond Member
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My understanding is that the small gap and big gap loctites have different viscosities, a bigger gap needs a higher viscosity so the loctite doesn't drain out of the joint.
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19th Aug 2016, 10:00 PM #10Senior Member
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Thanks Bob,
So you think its just down to the usually looser tolerances of the bigger nut? That was my guess too. The description on the packet just mentioned nut size (Over something like 28mm required large nut locktite from memory) I couldn't find the ĺarge nut stuff locally when searching the usual supects on the web but plenty of the normal stuff. My application was quite close tolerances even though a big thread, so i just went with the usual red stuff but i added a scew just in case.
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