I hadn't thought about 6mm bore pinions, actually - even with this motor I think the demand will be quite small in the grand scheme of things. If I did do hardened 6mm pinions, I wouldn't offer the whole range for sure.

Any chance of getting you to make some of these? What options would we have as far as pinions? Because I like to run huge tires I need a smaller one than others are going to need so I may be SOL but it would be nice to have some for the other people that don't need smaller pinions (I'll need 10-12T). I may also mod my CD mount to accept a 51T spur, which would open up a lot of gearing options.

Ya ditto...also I would buy a couple 6mm pinions:yes:

Put me down for several.....

Maybe Castle could send folks looking for 6mm pinions your way...

Here is a picture of how my shaft re-size turned out. A good digital caliper is a must. I also kept an old rotor magnet close to the grinding to snatch any metal bits in addition to punching the shaft out of a zip lock bag. http://i300.photobucket.com/albums/n...d/DSC07227.jpg

Nice job on that

Looks good man. Picture kinda says: "Hey, look at my "shaft"!"

It's here! I think I'll just grind my shaft down, I've been waiting for nearly a year for these to come out so I'm a bit uneasy grinding it down but here goes nothing...

The pics (and a little hand porn):
http://i140.photobucket.com/albums/r...h_DSC00038.jpg
http://i140.photobucket.com/albums/r...h_DSC00039.jpg
http://i140.photobucket.com/albums/r...h_DSC00041.jpg
http://i140.photobucket.com/albums/r...h_DSC00042.jpg
http://i140.photobucket.com/albums/r...h_DSC00044.jpg
http://i140.photobucket.com/albums/r...h_DSC00046.jpg
http://i140.photobucket.com/albums/r...h_DSC00047.jpg
http://i140.photobucket.com/albums/r...h_DSC00048.jpg
http://i140.photobucket.com/albums/r...h_DSC00049.jpg
http://i140.photobucket.com/albums/r...h_DSC00054.jpg

This thing is massive, in person it just dwarfs my 2650. I haven't run it yet, but THANK YOU CASTLE for making this motor. I really wish the Monster Truck versions would come with a shaft suited for a Monster Truck pinion but hopefully future versions will have a 5mm shaft. This should be all the motor we can handle for 1/8th scale.

aargggh, mine is not here yet.

Got mine 2 days ago. Definitely want to look into overcoming the 6mm obstacle and using it on my Muggy.

I bought a 3" pocket stone (coarse, of course) from Ace hardware and permeated the thing with 3-in-1 oil, hooked up the 1717 to my MMM, and held it at full throttle for short bursts while I pressed the stone into it. I only do short bursts and then stop to let it cool but so far I've been at it for 2 hours and still have some grinding to do before it's done. I tried a magnet and a paper towel but nothing seemed to be able to keep all of the metal shards out of the front bearing and now it's making a bit of noise. I've been cleaning it out and flushing 3-in-1 oil through it but I suspect I will need to replace it :diablo: Why oh why couldn't they give us a 5mm shaft....

Plastic baggie is your friend... Put the motor in, seal it up and push the shaft out. You motor is sealed.

I am really not looking forward to doing this when my 1717 comes in...

Hmm, that could work as long as the friction between the shaft and the bag isn't too much. I am ordering a new bearing anyway, by the time I got the shaft ground to the point that I could get the pinion far enough on the front bearing was seriously jacked up. I measured it at 6x16x5, shouldn't be too tough to find...

Looks like Mike is gonna have to start making some Mod1 and Mod1.5 pinions with 6mm bores. Turning down the motor shaft sounds like too much of a PITA IMO.

It is a major PITA. Took me about 3 hours, a lot of patience, and wore through part of a grinding stone. Should prove to be a very good shaft, judging by what it did to my stone :lol:

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

It's worth it! :gasp: 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.

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 :diablo:

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.

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

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

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.

http://i206.photobucket.com/albums/b...p/DSCF4010.jpg
http://i206.photobucket.com/albums/b...p/DSCF4011.jpg
http://i206.photobucket.com/albums/b...p/DSCF4012.jpg
http://i206.photobucket.com/albums/b...p/DSCF4013.jpg

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.

Great Job Linc ! Ingenius.

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.

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

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!

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

Looking good dude:great:

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

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.

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!

I would, but this vise is a cheapy harbor freight model and the press is not really good either. I would like to get a small lathe, just to get a feel for it.

i spoke to mike he "might" setup a conversion service to turn rotors from 6 to 5 or sell modded motors - would you pay for mike to grind your shafts?

I beg your pardon?! :gasp:

Sorry, I'd rather see Mike sell even a limited selection of pinions than offer that as a service. I don't want to cut the shaft on my 1717.


BTW, in case anybody from Castel is paying attention, the shaft size for teh 1717 is still shown on your chart wrong as 5mm.

We are changing the diameter for future motors to 5mm.

WOOHOO


by the way did anyone else notice the new 1512 1.5 1800kv motor. perfect for 6s buggies

OK, thats cool for future owners, but pretty much kills any hope for 6mm pinions from RCM for current 1717 owners....

Maybe the 5mm shaft rotors will be offered seperatly?If one wanted both size shafts for one motor.

I imagine there is only a small number of people who will ever actually own the 6mm version given what Patrick has just said, so everyone will write it off as a mistake pretty much & move on; Im sure Castle will take care of you if its that much of a problem getting 6mm pinions/ machining down the shaft to 5mm at home.:yes:

Glad to hear it :yipi: Will the heli motors (with the shaved fins) have the 6mm shaft and the Monster Truck motors be 5mm? IMO that's the way it should have been from the start, but oh well.

The front bearing is 6x16x5, correct? Mine got some metal shavings in it from grinding the shaft down and needs to be replaced.