R/C Tech Forums - Tamiya TT02 Thread

Ok need some help.

I’ve just fitted a Tamiya 64T spur gear, along with a 48P 28T pinion gear.

I'm using the standard plastic motor mount whilst I wait for my YR adjustable one to arrive.

I’ve got it to fit nicely, but it sounds awful!
Like a sort of grinding sound. Previously it was nice and quiet, but after fitting these bits, it’s very loud. Is that normal, or have I done something wrong?

I have greased the gears too.

The Tamiya aspur gear (Module 0,6) does not match the 48dp pinion.
If you convert 48 dp into the metrical system you will have module 0,53. (1/48*25,4)
Vice versa: module 0,6 is more equivalent to 42dp.
The result of the combination with real module 0,6 is not smoooth, but "pepper mill"

Kremzeek

05-25-2020 06:53 PM

Quote:

Originally Posted by Webarno (Post 15643549)

No, I couldn’t find one that was 28T.
I bought one from eBay.
Forum won’t allow me to post the link, but the item number is 274341095112

You want this:

https://www.tamiyausa.com/shop/optio...uorine-coated/

ittjv

05-25-2020 07:47 PM

Kremzeek, kremzeeeeek!!!!

Webarno

05-26-2020 03:07 AM

Quote:

Originally Posted by Kremzeek (Post 15643909)

You want this:

https://www.tamiyausa.com/shop/optio...uorine-coated/

So that will prevent the grinding sound with the Tamiya 64T Spur gear?
I can't see what the difference is with that pinion compared to the one I've purchased, unless it's just the coating?

JJ100179

05-26-2020 03:52 AM

Tamiya 64T spur gear is Module 0,6
Your pinion ist 48dp Module
Kremzeek's pinion is Module 0,6.
48 dp does not match Module 0,6 (see posts above), layout shape and size of tooth is different
Okay?

Webarno

05-26-2020 05:22 AM

Quote:

Originally Posted by JJ100179 (Post 15644026)

Tamiya 64T spur gear is Module 0,6
Your pinion ist 48dp Module
Kremzeek's pinion is Module 0,6.
48 dp does not match Module 0,6 (see posts above), layout shape and size of tooth is different
Okay?

I'm new to all this stuff, so the above doesn't make much sense to me, apart from the fact it seems I've bought the wrong pinion?

Thanks

Webarno

05-26-2020 05:37 AM

Trying to find the Tamiya 28T pinion in the UK seems impossible.

Would this work:
https://wheelspinmodels.co.uk/i/316877/

Thanks

JJ100179

05-26-2020 06:05 AM

This will work!

liljohn1064

05-26-2020 12:04 PM

Quote:

Originally Posted by Kremzeek (Post 15642495)

I got the 3 hole ones. I tried running with really stiff springs all around and didn't like it. That might work well on carpet, but I wasn't getting the traction I wanted on asphalt. I may actually go back to the softer kit springs on the rear.

Are the SR Kit springs softer than the red springs?

SteveM

05-26-2020 02:05 PM

Quote:

Originally Posted by Webarno (Post 15643549)

No, I couldn’t find one that was 28T.
I bought one from eBay.
Forum won’t allow me to post the link, but the item number is 274341095112

Robinson Racing sells the Tamiya compatible pinions in .6 module.

SteveM

05-26-2020 02:10 PM

Quote:

Originally Posted by Webarno (Post 15644046)

I'm new to all this stuff, so the above doesn't make much sense to me, apart from the fact it seems I've bought the wrong pinion?

Thanks

Tamiya uses it's own proprietary gears, in .4 and .6 module which looks like 64P and 48P but isn't.

If you use the Tamiya high speed gear set (TAM54500) but do not use the included Tamiya spur gear from the kit, you can use traditional 48P or 64P spur and pinion gears. This option would give you the most flexibility on gearing.

liljohn1064

05-26-2020 02:27 PM

Quote:

Originally Posted by Webarno (Post 15644054)

Trying to find the Tamiya 28T pinion in the UK seems impossible.

Would this work:
https://wheelspinmodels.co.uk/i/316877/

Thanks

Yes, It's mod 6 with a 3.2mm bore (1/8"). Most motor shafts are 1/8" Standard.

Webarno

05-26-2020 03:41 PM

Thanks a lot for all the replies. Very helpful :)

I clearly still have a lot to learn.

Kremzeek

05-26-2020 05:33 PM

Quote: