I think some resin is a little like PLA, hard plastic. I do see that the PETG I've printed is more flexible than the PLA. On the other hand, I'm sure there are some very flexible resin types available.
Stopped counting at 50hrs with the PETG spiders
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Thanks for that table of characteristic comparisons Dennis. I note that ABS has similar values to PETG except for strain (elongation) at break, which is much less.
There is an ABS 3D resin available so it might be worth a try with these spiders. But since the PETG filament is working well might as well just leave it alone. 
Dennis, looks like the clear choice is the PETg for this use. 
maybe late to this thread. I just glaced over it btw. if this has been suggested forgive me. when I have had this problem. what I have found worked for me was this.
Grind a flat spot on the motor shaft then take the other piece and bend it slighty out of round. this is with the good metal ones btw not the plastic ones as shown here. if its broken then your sol. carefully and gentaly squeeze this part. do not squeeze so tight you break it. it just needs to be slightly out of round.
glue back on with loctite and let it cure. then put it back together and forget it. this has worked every time for me. I have not had anymore issues even over time with this method. just my two cents here.
@Lionelzwl2012 posted:maybe late to this thread. I just glaced over it btw. if this has been suggested forgive me. when I have had this problem. what I have found worked for me was this.
Grind a flat spot on the motor shaft then take the other piece and bend it slighty out of round. this is with the good metal ones btw not the plastic ones as shown here. if its broken then your sol. carefully and gentaly squeeze this part. do not squeeze so tight you break it. it just needs to be slightly out of round.
glue back on with loctite and let it cure. then put it back together and forget it. this has worked every time for me. I have not had anymore issues even over time with this method. just my two cents here.
interesting idea; this has not been suggested earlier in this thread. Sounds like it should work fine except I don't think Lionel sells spiders separately, plastic or metal. For my part though for now I'll just stick with the PETG replacements as they seem to be working well. And they are dead-easy to change out if/when they fail; you don't even need to pull the shell to do it.
Rod
Lionelzwl2012; have you had any trouble with the metal spiders adversely wearing the metal crown coupling?? Others have reported this problem.
Rod
no I have not rod at least I have not noticed that. my issue was my spiders were not cracked they just came loose and were spinning. they were metal btw. I tried just loctite at first and they again just worked loose.
thats when the flat spot on the motor shaft occurred to me and wala it worked like a charm. I little loctite and they never come off or spin. problem solved.
maybe you could 3d print a flat spot in your spiders and achieve the same thing.
@Lionelzwl2012 posted:thats when the flat spot on the motor shaft occurred to me and wala it worked like a charm. I little loctite and they never come off or spin. problem solved.
maybe you could 3d print a flat spot in your spiders and achieve the same thing.
That's exactly what I was thinking! Your solution is brilliant in its simplicity, thanks!
This idea will be worth a try if the PETG replacements start to cause any trouble. it's an easy change to the 3D print file.
Rod
@Lionelzwl2012 posted:no I have not rod at least I have not noticed that. my issue was my spiders were not cracked they just came loose and were spinning. they were metal btw. I tried just loctite at first and they again just worked loose.
thats when the flat spot on the motor shaft occurred to me and wala it worked like a charm. I little loctite and they never come off or spin. problem solved.
maybe you could 3d print a flat spot in your spiders and achieve the same thing.
What loctite are you using on the metal spiders Roger?
Pat
pat,it is loctite 680 part#23416. it seems to hold great at least I have not had any spiders loosen up after doing this.
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All of you guys are doing a great job on trying to find alternatives for solving the problem with the broken spiders. I do not understand why Lionel does not have replacement part spiders?
Marty
@Lionelzwl2012 posted:pat,it is loctite 680 part#23416. it seems to hold great at least I have not had any spiders loosen up after doing this.
That’ll work, …I prefer 640, but 680 is fine…….I have a very sharp thin chisel. I stake the shaft, clean the shaft & the die cast spider with alcohol, then a tiny drop of 640 in the spider, then beat it on. Never had a comeback…..
Pat
@martind posted:All of you guys are doing a great job on trying to find alternatives for solving the problem with the broken spiders. I do not understand why Lionel does not have replacement part spiders?
Marty
That’s a great question, …..Rod has lead the charge on this attack, & Dennis supplied the armaments to press on the offensive ( no pun intended ) ……..why doesn’t Lionel offer something as a service part, is a mystery to me, ……I have my suspicions, but more than likely they’re not interested in out of warranty infield product support…..There’s been a few issues on certain models out of warranty that we’ve had to diagnose, develop a campaign, and implement that campaign without so much as a peep from the orange box people……but as Rod, Dennis, and a few others demonstrated on this campaign, where there’s a will, there’s a way….
Pat
Well put Pat. And most importantly, a fix plan beats the heck out of leaving them boxed up under the layout, or sitting on a shelf collecting dust!
@Rod Stewart posted:Well put Pat. And most importantly, a fix plan beats the heck out of leaving them boxed up under the layout, or sitting on a shelf collecting dust!
This whole thread is packed with useful information, tips, techniques, & theories, …it’s threads like this that make the problem solving end of this hobby great!….everyone gets together and devises the solution, ….it in itself is a useful tool,….no bickering or whining!…
Pat
