Need Low Gearing solutions.

[Cul-Tech]

Hey Lads,

I need some help from someone out there to solve my gearing problem on my homemade crawler. It uses a SC gearbox and the gearing is to fast for crawling. What I am really looking for is possibly some sort of planetary gear setup that would go inline with the motor. I have looked into the high torque low rmp motors but I don't feel this is what I want, I have also looked into cutting custom gears for the SC gearbox but with the limited distance between motor and input shaft I could really only fit a pinion with one or two teeth less.[]

I once saw a two speed system on RC4WD that looked like it might be my answer but they no longer carry it.[]

I also do not want to do away with the gearbox, it it very unique to my frame.[]

Thanks,

Mike.

[spikey]

Have a look at http://www.huntersystems.co.uk/acatalog/Gearboxes.html

No picture at the moment[8)] but i think this is the sort of thing your are after[?]

i have a gearbox like this one spare[]

Martin

[TWINSET]

Mike

How about fitting a gear to one of the output shafts at the bottom of the gearbox (where the UJ would go) then use that to drive another spur?

Couple of extra plates and some bearings and you're laughing

Or, for a tidier alternative, try Tower;

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXS727&P=7

[mjohnston39]

I don't know if it will give you enough reduction, but what about a 1/14 3 speed gear box. I seem to recall somewhere on RC4wd photos of one set up with a transfer box, maybe you could mate it to your SC gearbox? just a thought.

Mike.

[Cul-Tech]

This is the beauty of this site and these forums, in one day I got three different suggestions for my problem.[]

I will figure out what I will do and definitly let the public know.

Thanks for the links.

Mike.

[TWINSET]

Any use?;

http://www.modelflight.com.au/graupner_gearboxes.htm

http://www.wattsup.co.nz/page14.htm

[TWINSET]

Taken the plunge on some kit, for a forthcoming TLT project []

40 turn motor

3.8:1 inline gearbox

Spoke to a chap at http://www.fanfare.f9.co.uk/ who was well helpful on it all; the gearboxes are designed for airplane props, and although he'd not heard of crawlers, wasn't too dismissive of the idea []

The thinking is to run a pinion off the end of the gearbox pictured above, then use that to turn a spur.

Current TLT gearbox produces 8:1 (nearly) so a regular pinion and spur combo will easily result in 8:1+

[Cul-Tech]

Well this took a long time, I finally found a uS distributor that sells the same gearbox that Twinset got. It costs $30usd and I have one on the way.[]

Can't wait to mount it on my Silverado TXT.

Thanks to Twinset for putting up photos of this unit I needed those to locate it.[:X]

Mike

[Jeckler]

Alot of crawlers use the GD-600 from Great Planes. The output shaft is 5mm, so it'd need to be machined to the standard 3.2mm for standard pinions. Redux from 2.5-3.8:1.

[Cul-Tech]

Yes I have seen the GD-600, it is much more common. What I like about this unit is that its inline design makes it very compact for special applications where space is at a premium. However it would be nice to be able to adjust the ratio.

[TWINSET]

quote:

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Originally posted by Cul-Tech

However it would be nice to be able to adjust the ratio.

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You want one of these then []

http://www.tamiyaclub.com/showroom_model.a...id=21560&id=169