Manix92 121 Posted July 1, 2020 I'm after replacing the plastic diff screw nut on the Zahhak with a steel or aluminium one Question is does just about any diff screw nut fit? The TRF-201 number for the parts(s) is 19804409 and is not the easiest item to get hold of. But would just about any Tamiya nut for diff joints fit?? For instance there seem to be loads of Tamiya 51341 for the TRF-416 about https://www.ebay.co.uk/itm/Tamiya-51341-TRF416-Differential-Screw-Nut-TRF416WE-TRF416X-NIP/382003398211?epid=682832152&hash=item58f12d4643:g:uaEAAOSwXYtYyVVT would the nut from this fit or is there something even cheaper I could get? Share this post Link to post Share on other sites
Rb4276 803 Posted July 1, 2020 I believe the associated b4 will fit, im pretty sure i used one for my dn01 but it has been a few years ago 1 Share this post Link to post Share on other sites
Howards 457 Posted July 1, 2020 Yeah that plastic diff screw is an odd one. That said, it didn't let me down, but now I've swapped out the entire gearbox with its 201 counterpart with the slipper and metal outdrives. 1 Share this post Link to post Share on other sites
Manix92 121 Posted July 1, 2020 3 hours ago, Rb4276 said: I believe the associated b4 will fit, im pretty sure i used one for my dn01 but it has been a few years ago OK I think I found it, is this the one you mean? https://wheelspinmodels.co.uk/i/24592/ Looks like natural nylon with a steel nutsert so it's going to be better if it fits. Share this post Link to post Share on other sites
Manix92 121 Posted July 1, 2020 3 hours ago, Howards said: Yeah that plastic diff screw is an odd one. That said, it didn't let me down, but now I've swapped out the entire gearbox with its 201 counterpart with the slipper and metal outdrives. Have no idea why they used plastic. Stripped the first one in the kit with force of the spring. The second one in the kit I have been making sure I push a screwdriver against it when I screw the bolt in. Share this post Link to post Share on other sites
Howards 457 Posted July 1, 2020 I suspect its a sacrificial part designed to prevent things like the diff screw snapping (Egress I'm looking at you) or the plates getting warped or damaged by over-torquing. Share this post Link to post Share on other sites
Rb4276 803 Posted July 1, 2020 1 hour ago, Manix92 said: OK I think I found it, is this the one you mean? https://wheelspinmodels.co.uk/i/24592/ Looks like natural nylon with a steel nutsert so it's going to be better if it fits. I didnt buy a complete kit, i had just an aluminum nut to fit the diff Share this post Link to post Share on other sites
Mozzie 26 Posted September 2, 2020 @Manix92 did you find a nut to fit by any chance? Share this post Link to post Share on other sites
Manix92 121 Posted September 3, 2020 4 hours ago, Mozzie said: @Manix92 did you find a nut to fit by any chance? No sorry My second one is holding up still. I am considering getting some done on shapeways from aluminium or stainless steel/bronze or even the pure stainless mix, they would need to be tapped post production - I think it's M2.5. Then because they charge per part I was thinking maybe getting several joined together that need to cut/separated into the individual parts if that makes sense. I have been busy the last few weeks hence not being on here much. It shouldn't take long though to model in Solidworks when I get a chance. Share this post Link to post Share on other sites
Mozzie 26 Posted September 3, 2020 Cheers for letting me know. I've just found this https://www.eurorc.com/product/21715/xray-alu-ball-diff-25mm-nut---swiss-7075-t6, have ordered and will report back, will also try the trf415 one which I ordered too. Share this post Link to post Share on other sites
Mozzie 26 Posted September 5, 2020 Hi @Manix92 been doing a bit more research. The thrust bearing washers on the DN01 are identical to the TRF417 This means the shaft should be the right thickness Given that the dog bones and UJs seem to be pretty standard across the Tamiya range I assume the nut lugs that fit into the out drives should be fine too. The lugs do look a little thicker on the picture but pretty confident they could be filled down a bit if that's the case. I can't find the length but from the pictures they look broadly the same. They seem to be in plentiful supply and I've just picked one up from Tony's Tamiya parts link below. I'll let you know if it works! https://www.ebay.co.uk/itm/383481749905 Share this post Link to post Share on other sites
Finnsllc 917 Posted September 5, 2020 @Mozzie I dont think that will work. the wings look way to thick part N19 on the tree. i just put an aluminum one in but actually have no idea where i got it Share this post Link to post Share on other sites
Jontea 334 Posted September 5, 2020 Said it before, I'll say it again, get a gear diff conversion, problem solved! Share this post Link to post Share on other sites
Howards 457 Posted September 5, 2020 The TRF201 equivalent part is metal - get that. part number is 19804409 https://tamico.de/Tamiya-Kugeldiff-Schraube-Mutter-26x22mm-19804409 failing that the Durga uses a plastic part with a metal nut inside, could try that. Share this post Link to post Share on other sites
Manix92 121 Posted September 6, 2020 11 hours ago, Howards said: The TRF201 equivalent part is metal - get that. part number is 19804409 https://tamico.de/Tamiya-Kugeldiff-Schraube-Mutter-26x22mm-19804409 failing that the Durga uses a plastic part with a metal nut inside, could try that. The TRF201 part is unobtainium last time I tried to buy one. Durga could be a option but then again how easy is that to find and is it M2.5 which I believe the DN01 is. Share this post Link to post Share on other sites
Howards 457 Posted September 6, 2020 4 hours ago, Manix92 said: Durga could be a option but then again how easy is that to find and is it M2.5 which I believe the DN01 is. It uses a 2mm x 25mm hex screw. with a suitably sized washer the 2mm screw could work as a replacement for the 2.5mm then you can use DB01 k parts for the plastic part and a 2mm locknut. but yeah what a pain. Share this post Link to post Share on other sites
Jontea 334 Posted September 6, 2020 5 hours ago, Manix92 said: The TRF201 part is unobtainium last time I tried to buy one. Durga could be a option but then again how easy is that to find and is it M2.5 which I believe the DN01 is. Says they have 10+ in stock here......... https://www.autopartner.se/bilar/reservdelar/tamiya/ovriga/tamiya-19804409-differential-screw-aluminium 1 Share this post Link to post Share on other sites
Mozzie 26 Posted September 6, 2020 2 hours ago, Jontea said: Says they have 10+ in stock here......... https://www.autopartner.se/bilar/reservdelar/tamiya/ovriga/tamiya-19804409-differential-screw-aluminium Legend, I've been traveling the web trying find one hadn't come across this site! Thanks mate 1 Share this post Link to post Share on other sites
Jontea 334 Posted September 6, 2020 1 minute ago, Mozzie said: Legend, I've been traveling the web trying find one hadn't come across this site! Thanks mate Yer welcome. Share this post Link to post Share on other sites
Manix92 121 Posted September 7, 2020 On 9/6/2020 at 8:46 AM, Jontea said: Says they have 10+ in stock here......... https://www.autopartner.se/bilar/reservdelar/tamiya/ovriga/tamiya-19804409-differential-screw-aluminium Good find but at £27 (seems the correct exchange rate) for a small aluminium nut I'm out. I will have a browse later see if they have anything else I need and maybe I can justify it then. Share this post Link to post Share on other sites
Jontea 334 Posted September 7, 2020 25 minutes ago, Manix92 said: Good find but at £27 (seems the correct exchange rate) for a small aluminium nut I'm out. I will have a browse later see if they have anything else I need and maybe I can justify it then. Wow! Postage is insane, find someone on here in Sweden, get them to send it to you in a jiffy bag? Share this post Link to post Share on other sites
ThunderDragonCy 7882 Posted September 8, 2020 On 7/1/2020 at 3:54 PM, Manix92 said: I'm after replacing the plastic diff screw nut on the Zahhak with a steel or aluminium one Question is does just about any diff screw nut fit? The TRF-201 number for the parts(s) is 19804409 and is not the easiest item to get hold of. But would just about any Tamiya nut for diff joints fit?? For instance there seem to be loads of Tamiya 51341 for the TRF-416 about https://www.ebay.co.uk/itm/Tamiya-51341-TRF416-Differential-Screw-Nut-TRF416WE-TRF416X-NIP/382003398211?epid=682832152&hash=item58f12d4643:g:uaEAAOSwXYtYyVVT would the nut from this fit or is there something even cheaper I could get? I have just found a 201 blue diff screw in my spares box and i don't need it. I am uk based. Make me an offer. Share this post Link to post Share on other sites
Mozzie 26 Posted September 8, 2020 On 9/5/2020 at 2:59 PM, Finnsllc said: @Mozzie I dont think that will work. the wings look way to thick part N19 on the tree. i just put an aluminum one in but actually have no idea where i got it The Egress one fits the thread and just requires some slight filing on the wings and it's done up nice and tight now with no slipping. Not ideal but I've got the other ordered from Sweden so this will do in the meantime. 1 1 Share this post Link to post Share on other sites
Juls1 1661 Posted September 9, 2020 I just used the stock screw, put a washer in there, and a nylock nut, stuck a screwdriver down the side to stop it turning while i tightend it. been working perfectly for a few years now. Agreed, the stock plastic bit is a bit pointless. A proper alloy one would be Ideal though. Share this post Link to post Share on other sites