Honza
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Posts posted by Honza
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37 minutes ago, Jonathon Gillham said:
4wd buggies have gone away rrom ball diffs
Yes, even Tamiya's TRF503 had gear diffs. Quite interesting they went back to ball diffs in TD4.
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46 minutes ago, rwordenjr said:
so you can buy 2 of the ta-06 gear diffs and use them in front/rear?
Yes, it looks like the whole transmission is based around XV01 gears, with extra bevels that replace belt with shaft drive.
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9 hours ago, Raman36 said:
Another name for Mod 0.6 is metric 48 pitch.
Never heard this one but it sounds like total nonsense. Do you call 3mm balls "metric 3/32" too? Because that'd be the same thing. It's just wrong and it doesn't matter who calls it like that.
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32 minutes ago, ThunderDragonCy said:
I think that seals it for gear pitch too. Thd TA06 diff is 48dp.
But that's differential pitch, not spur gear pitch.
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12 hours ago, Raman36 said:
It’s Tamiya metric 48. Tony in competitionX video installed standard 48p.
Does the XV01 use the TRF201 slipper?
What is "metric 48"? Tamiya uses metric 0.4, 0.5, 0.6 but TRF buggies (and slippers taken from them) have proper 48p. XV has slipper derived from TRF201.
10 hours ago, matisse said:God gear pitches are annoying. I always thought 48dp was close to 0.5m and “metric 48” was 0.6m
i give up
48p is 0.53 - close to 0.5, but not close enough to be compatible (it needs to be within 0.01mm) m0.6 is 42p (I think I've seen some Traxxas gears in this pitch)
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13 hours ago, wtcc5 said:
The oil sweats slowly through the housing walls.
There's one method, which address this issue - remelting/annealing prints in salt or plaster makes even FDM prints airtight:
It might be good enough atleast for prototypes
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On 9/14/2020 at 8:52 PM, wtcc5 said:
Just an update where my TC-01 conversion is heading...
Any update on chassis conversion?
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On 12/29/2020 at 9:39 AM, Superluminal said:
Is that centre to centre of drive pins or overall length end to end?
Centre to centre of drive pins.
On 12/29/2020 at 11:14 AM, taffer said:Are you sure they are 48mm?
I found info saying 55mm?
It might be +-1mm, I'd have to measure them again. It's centre to centre length, 55mm might be overall length.
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What I can remember from onroad chassis:
39mm - TL01, TA01 / 02T, DF-03RA, XV01 rear
42mm - TA02 front, TB02, TA05 + some other cars with TRF414 suspension, XV01 front, TB03D
45mm - TB03, TA05V2
48mm - F201, TA05IFS
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On 8/14/2020 at 8:08 PM, DarkSonic said:
The main problem to produce new diff parts is the toothing of the diff joint.
Maybe diff joints for TT01 (53790 or 9804237) would make it easier?
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I have one question regarding to G6-01.
What's size of #54808 idler? I assume that it's neatly identical to TL01/M0x differential gear? I need it for project I am working on.
Thanks.
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I think it was discussed earlier in another thread, but it'd be nice, if tamiya made standard sized onroad/rally tires for 1.7 or 1.55 rims. Some bodies would benefit from it.
Also, some decent entry-level rally chassis. I found that MF01 would be pretty capable, if it had mid motor and proper (long arm) suspension.
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15 hours ago, Grotty Otty said:
This is a great effort with the build. Am I the only one thinking it could make a great rally chassis? Looks like the lower wishbones can pivot fairly low.
That was my first thought. Front motor layout looks great, if suspension has enough travel (or can be replaced by standard TC or XV01 suspension), it could be decent rally car.
Thing that I dont like about this chassis are integrated differential gearcases... Stripped thread means whole chassis disassembly (interesting how Tamiya used drop-in nuts in most parts, with exception of gearboxes) instead of swaping gearcase. Also custom chassis (for long wheelbase F1 for example) is impossible
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On 8/15/2020 at 10:37 AM, Carmine A said:
Especially sad but true... Most true Car Enthusiasts KNOW that in the 80's and 90's, with few exceptions, 50, 60, 65 and 70 Series Aspect Ratio Tires were the norm for Performance Tires. MUCH more Sidewall than has been represented by Tamiya.
This is not only problem of vintage.. modern rally cars use 15" rims with high sidewall for gravel races, so RC rally car with low profile offroad tires looks weird, too.
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1 hour ago, ThunderDragonCy said:
I couldn't ev3n get the EVO IV bevel gear to fit over the cross pin on the TB03 outdrives so i gave up at that point.
That's because small hole for screw has 2mm in diameter, but input shaft is 3mm. Crosspin is same 2x8mm.
You're right, it's extra work to make it fit, it's needed only if you want low FDR.
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You can fit Evo 4 gear on TB03 shaft, if you drill hole to correct diameter and file that excess material. I did it by placing gear on 5mm shaft, so it could spin freely, and then used dremel to take material away evenly.
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40 minutes ago, ThunderDragonCy said:
I wanted the 39t bevels so I could avoid having to switch out both ends
I know, that you have no issues, but alternative with 39T crown and 16T input bevel is 51255 from TB-evo 5, which was used in TB03 one-way set.
Also, I'm not sure if it was mentioned before, but 51438 is compatible with TB03, from my experience, 12-ball diff can be built looser and smoother than 8-ball.
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@ThunderDragonCy Mesh might be little off, because bevel gear angle changes with gear ratio. But it's just 1 tooth, so difference will be very small, about 1 degree, which might have no effect at all.
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On 7/18/2020 at 3:14 PM, ThunderDragonCy said:
39t crown gear just like the TB03, and the 51109 plastic evo 4 one way gearset is still available
Evo 4 crown gear is 39T, but input gear is one tooth larger - now I can't remember exact number - so it won't work with TB03 diff on other end. You'll need TB03 spool/one way gearset. Also from what I've read, end of input shaft have to be grinded a bit, otherwise it rubs against diff case.
You could also build ball diff with TB04 gears, it has 12 balls, so it'll be slightly smoother.
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9 hours ago, Jonathon Gillham said:
Something TB05 based would be interesting, with the option for front and rear motor too.
New TC-01 would be interesting, it has similar layout to competitive buggies. But I'm affraid that suspension mounts are too weak for long arms..
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Right now, I'm testing 3D printed gear in my MF01X, printed from PET-G on FDM printer with 0.2 nozzle. I had time to run only 1 pack, but it survived so far.
It seems that 0.8 gears can be printed with reasonable detail on FDM, they mesh properly with original gears. I plan to test 0.6 and also printed-to-printed in future.
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48P is 0.53 metric. So it's not "small difference", even 0.5 metric doesn't fit right - according to man who makes precise gears for RC cars, difference under 0.01mm is accetable.
But 64p is 0.397, which is much closer - I guess that injection molded gears have larger variation in dimensions than that.
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1 hour ago, Superluminal said:
Trouble is;
I can get this;
https://www.ebay.co.uk/p/2254315826
But now cant find any suitable 0.4mod pinions. They all seem to be about 45 teeth which is mahoosive
0.4 is compatible with 64p pinions, if that helps
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I think that MF-01 was good idea, but it lacks in realisation. It solved some issues of TL01 and added modularity to make it truly versatile. But high-mounted rear motor and weird rear geometry offset those improvements for me..
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The Tamiya Super Avante #58696 Information and Pictures
in General discussions
Posted
I'm not sure what's target of 90% of Tamiya's products.
This one doesn't look like competition buggy. But ball diffs with cageless thrust bearings and overall complexity doesn't look like beginner's backyard buggy either.