RCCrawler Forums

tetsulo · 03-10-2005, 04:35 PM

I haven't had a chance to try it yet but here is my solution to locking the stampede diff. JB Weld is messy, takes time to cure, and with the planetary design isn't guaranteed to hold. Hot glue just doesn't float my boat.

The gears aren't hardened so are very easy to work with. I have a lathe so I chucked up the parts and did a little material removing...

First I removed the 2mm flanges from sun gears.

Then I cut off most of the output shaft and turned the third sungear down to 4mm wide. A little more or less isn't going to hurt. (leave a little of the flange on one side and a tiny bit of shaft on the other...

Reassemble with the third gear in the middle. This will effectively lock all gears in place. Either the diff will have to explode or teeth will need to be break from the gears in order to open it up again. I suspect the outer gear (white plastic) will pop/break before the inner parts. Keep a gear assembly close at hand and this can be fixed on the trail!

If your careful this could be done with a hacksaw and vice with no problems...

parts required.

traxxas part # 2382 6$ at my LHS

time 15mins (with my lathe)

tetsulo.

mike · 03-10-2005, 04:52 PM

nice work. would you consider producing a few?

tetsulo · 03-10-2005, 08:12 PM

I guess from 46 views and one response it isn't so ultimate after all

Thanks for your response though. Seriously, if you have a hacksaw and file you could do this with very little effort. Biggest job is just getting the filing somewhat level. From scratch it would take two packs to make one set of gears. That would leave one sun gear left over, and all the planetary gears and cross pins.

What would something like that be worth?

tetsulo

rocpede · 03-10-2005, 08:17 PM

that is a good idea, i thick i'll try when i save the money up

BoilermakerFan · 03-10-2005, 09:35 PM

Quote:

Originally Posted by tetsulo

What would something like that be worth?

tetsulo

Well, you have $6 in parts since you have to buy the whole parts bag and you have 15 minutes of your time. How much is your time worth, or how much does a local machinist get paid? I would add at least $10 for your time per part, tooling, etc.

I would cut mine down with a Dremel and then wet sand it flat and even. I think I'd have at least 45 minutes in it to do the job correctly.

Plays_with_Toys · 03-10-2005, 10:18 PM

Nice. I just opted for Quicksteel. Its like silly putty, but sets up in like 8 minutes. Haven't had a problem yet, in any of my diffs. The radiator on my 1:1 on the other hand... That heated up the stuff and it lost its consistency.

Do you not spend anymore time over at RCMT?

tetsulo · 03-11-2005, 06:11 AM

PWT -- I still am at RCMT but it is just so slow, your email to the thread about the TSC-10 got me over here.

Boilermaker -- It would take two part bags to make all gears. Three bags would make two complete sets -- two of output sun gears and the 'locker' So 9 dollars in parts + 10 bucks in time and tooling = 19 dollars + shipping. $10 bucks is what I had figured for time.

slbks5, I meant ultimate locker -- NOT diff. That is a beautiful piece of machining but I still don't see a way to lock it. If the sun gears are the weak link in the drive line what use is the beefed up outer casing?

tetsulo

ronbeck · 03-11-2005, 02:05 PM

remeber that roninson racing makes hardened sun gears. they are made for the nitro pede but work in the electric version as well. well searched tower and i couldn't find the part number. i will look for it out at the work bench later.

tetsulo nice to see you here ;)

the OG maxx tranny powering tlt axles! guy.

tetsulo · 03-11-2005, 03:03 PM

Googling robinson stampede and hardened yielded a part # RRP8500

can't find that listed on tower. Perhaps disco'd?

thanks.

Thanks for remembering my TLT!

tetsulo

tetsulo · 03-12-2005, 07:25 AM

I asked around about machining hardened steel. In my lathe the best way is to get a grinding attachment. That stuff will eat carbide bits like crazy. A dremel would work on the hardened steel too but it would take a while. I think I'll stick with the plain steel and see how it works out.

tetsulo.

03-10-2005, 04:35 PM	#1
tetsulo Newbie Join Date: Mar 2005 Location: Pittsfield Posts: 13	Ultimate stampede locked diff? I haven't had a chance to try it yet but here is my solution to locking the stampede diff. JB Weld is messy, takes time to cure, and with the planetary design isn't guaranteed to hold. Hot glue just doesn't float my boat. The gears aren't hardened so are very easy to work with. I have a lathe so I chucked up the parts and did a little material removing... First I removed the 2mm flanges from sun gears. Then I cut off most of the output shaft and turned the third sungear down to 4mm wide. A little more or less isn't going to hurt. (leave a little of the flange on one side and a tiny bit of shaft on the other... Reassemble with the third gear in the middle. This will effectively lock all gears in place. Either the diff will have to explode or teeth will need to be break from the gears in order to open it up again. I suspect the outer gear (white plastic) will pop/break before the inner parts. Keep a gear assembly close at hand and this can be fixed on the trail! If your careful this could be done with a hacksaw and vice with no problems... parts required. traxxas part # 2382 6$ at my LHS time 15mins (with my lathe) tetsulo. Last edited by tetsulo; 12-28-2006 at 07:13 AM.

03-10-2005, 04:52 PM	#2
mike RCC Addict Join Date: Nov 2004 Location: Redding, CA Posts: 1,288	nice work. would you consider producing a few?

03-10-2005, 08:12 PM	#3
tetsulo Newbie Join Date: Mar 2005 Location: Pittsfield Posts: 13	I guess from 46 views and one response it isn't so ultimate after all Thanks for your response though. Seriously, if you have a hacksaw and file you could do this with very little effort. Biggest job is just getting the filing somewhat level. From scratch it would take two packs to make one set of gears. That would leave one sun gear left over, and all the planetary gears and cross pins. What would something like that be worth? tetsulo

03-10-2005, 08:17 PM	#4
rocpede RCC Addict Join Date: Jun 2004 Location: Bruiser Heaven!!!! Posts: 1,463	that is a good idea, i thick i'll try when i save the money up

03-10-2005, 10:18 PM	#6
Plays_with_Toys I wanna be Dave Join Date: Jun 2004 Location: Centennial, CO Posts: 2,129	Nice. I just opted for Quicksteel. Its like silly putty, but sets up in like 8 minutes. Haven't had a problem yet, in any of my diffs. The radiator on my 1:1 on the other hand... That heated up the stuff and it lost its consistency. Do you not spend anymore time over at RCMT?

03-11-2005, 06:11 AM	#7
tetsulo Newbie Join Date: Mar 2005 Location: Pittsfield Posts: 13	PWT -- I still am at RCMT but it is just so slow, your email to the thread about the TSC-10 got me over here. Boilermaker -- It would take two part bags to make all gears. Three bags would make two complete sets -- two of output sun gears and the 'locker' So 9 dollars in parts + 10 bucks in time and tooling = 19 dollars + shipping. $10 bucks is what I had figured for time. slbks5, I meant ultimate locker -- NOT diff. That is a beautiful piece of machining but I still don't see a way to lock it. If the sun gears are the weak link in the drive line what use is the beefed up outer casing? tetsulo

03-11-2005, 02:05 PM	#8
ronbeck Quarry Creeper Join Date: Aug 2004 Posts: 347	remeber that roninson racing makes hardened sun gears. they are made for the nitro pede but work in the electric version as well. well searched tower and i couldn't find the part number. i will look for it out at the work bench later. tetsulo nice to see you here ;) the OG maxx tranny powering tlt axles! guy.

03-11-2005, 03:03 PM	#9
tetsulo Newbie Join Date: Mar 2005 Location: Pittsfield Posts: 13	Googling robinson stampede and hardened yielded a part # RRP8500 can't find that listed on tower. Perhaps disco'd? thanks. Thanks for remembering my TLT! tetsulo

03-12-2005, 07:25 AM	#10
tetsulo Newbie Join Date: Mar 2005 Location: Pittsfield Posts: 13	I asked around about machining hardened steel. In my lathe the best way is to get a grinding attachment. That stuff will eat carbide bits like crazy. A dremel would work on the hardened steel too but it would take a while. I think I'll stick with the plain steel and see how it works out. tetsulo.

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