Castle 1717

[bruce750i]

I can re-size your motor shafts. pm me.

It's worth it! 1717 6s

The 1717 stayed under 90*F pushing 10-12lb in loose stuff geared 50ish!

I think I was pegging it on 4s, on 6s I ran out of space real quick.

No hot wires, no hot lipos, MMM's fan ran for 20 seconds after stopping.

[Unsullied_Spy]

What did you use to trim yours down? Looks like it should be an excellent MT/heavy truggy motor, once we get a 5mm shaft

[bruce750i]

Dermil with the cut off wheel & sanding drum, motor in a mount, heat shrink tube cut short and layered up a bunch on the shaft to cover the bearing, magnet, zip lock, set transmitter end point to med-slow motor rpms. I used a 4s for grinding power but 2s,3s would have safer no load rpms. Zip lock did kind of suck, it would grab and try to twist up around the shaft, unless the hole was to big to do much anyways, but it kept the dust of the rest of this beastly motor. Then just stroke the shaft nice and easy. I held the cut off wheel rotated about 30* from axis of the rotating shaft to help maintain squareness.

[Unsullied_Spy]

The sanding drum was enough to trim the shaft down to 5mm?

[lincpimp]

I have a technique that I plan to try.... I will set it up and take some pics.

[lincpimp]

OK, here we go.

So I used my drill press, 2 axis vise and some dremel and larger grinding stones. Took about 20mins, and that was with me constantly checking it and letting it cool.

Pics tell the story.

[Unsullied_Spy]

That came out clean! 20 minutes has me jealous, I was grinding on mine all night.

[lincpimp]

Originally Posted by Unsullied_Spy

That came out clean! 20 minutes has me jealous, I was grinding on mine all night.

Its not too bad, I tried a bunch of pinions on it, some are slightly tighter than others... But it works.

Now I get to reassemble the lst and give it a try. I also have to make a tray for the zippy 5k 40c 6s pack... Maybe this weekend... No time.

[Bondonutz]

Great Job Linc ! Ingenius.

[bruce750i]

That's cheating on the motor mount linc! Nice job! This 6mm thing is Really going to piss off the traxxas noobs when they see our RCM revos rolling 1717's over there and they start looking for 6mm 32p pinions. I need to mock one up and post it up over there to stir em up.

[lincpimp]

Originally Posted by Bondonutz

Great Job Linc ! Ingenius.

Thanks, imagine what I could do with a small mill or lathe...

Originally Posted by bruce750i

That's cheating on the motor mount linc! Nice job! This 6mm thing is Really going to piss off the traxxas noobs when they see our RCM revos rolling 1717's over there and they start looking for 6mm 32p pinions. I need to mock one up and post it up over there to stir em up.

Yeah, I know, but I like cheating!

Need to drop tdr a line and see what he would charge me to make up some insterts with m4 holes. I would mosify the one I have, but if there is no difference, why bother!

[lincpimp]

Heads up, td racing has 20% off...

[Urgeoner]

Looking good dude

Now what will i do, keep it a 6, or dremel down to 5?

[riverat1540]

Just be carful if grinding down the shaft to 5mm not to let the flat spot let you throw the shaft off whack while grinding as it will cause the bit to hop if not stabilized. Then u will have a pinion that meshes funny as the shaft is no longer centered.What link did is about the best way short of cutting it with a lathe.

[bdebde]

Link you should put a lathe bit in the drill press (leave it turned off). With a two axis vise and the motor running, all you need to do is hold a bit stationary and it would work great!