tools fer cheatin!

[matt1ptkn]

So I've been on a kick lately freshening up some old stock brushed motors. Has anyone ever developed a "tool" to open the tabs on non-rebuildable 27T brushed motors? I've been using the "smack it on a hard surface" approach, which works, but I ended up dislodging a magnet on one. Plus that hard, sudden impact is obviously not good for anything (especially hands).

[jwscab]

i used to use a jewelers screwdriver, the ones with the black tip and silver ribbed handles with the spinner on top. I had one probably 1/8" wide that was sort of stubby and fit in the slot nicely. I also used a pick tool sometimes. you can pry against the motor endbell and get the tab to start bending out with the screwdriver, then follow with the pick because the tip is tougher.

I never raced or cheated with them, I just liked to rewind them since I had no money for rc parts. had plenty of scrap magnet wire and a good soldering iron. Once they got hot enough to throw the solder and shut down, I'd rewind or repair, depending on how the performance was.

[XLR8]

Also, if you have access to an arbor press or even a drill press, you can use it to gently press the motor apart. I've used a flat motor plate screwed into place ( or a scrap aluminum plate with holes drilled to accept the motor), then secure the motor upright between a couple blocks on the press table. The hole in my drill press table isn't large enough to fit the motor so I have to support the motor between two blocks. Then, use a short piece of round stock in the chuck to drive the motor shaft downward.

[matt1ptkn]

Also, if you have access to an arbor press or even a drill press, you can use it to gently press the motor apart. I've used a flat motor plate screwed into place ( or a scrap aluminum plate with holes drilled to accept the motor), then secure the motor upright between a couple blocks on the press table. The hole in my drill press table isn't large enough to fit the motor so I have to support the motor between two blocks. Then, use a short piece of round stock in the chuck to drive the motor shaft downward.

I just now finally wrapped my brain around what you were describing here. This is a great idea and it will certainly mean fewer scraped fingers and less frequent hand stabbings for me versus slamming or prying. Thank you!

[XLR8]

Thanks Matt.
Yeah, doing it this way, you won't need to touch the endbell or pry on the metal tabs on the can. Just apply a linear force to the pinion end of the motor shaft and let the shaft and armature push the endbell out of the can. Then, before reassembly, use small needle nose pliers to gently move the tabs apart just enough to allow the endbell to fit back into the can. Finally, use a small screwdriver to reset the tabs and lock the endbell in place. Voilà, no more trips to the emergency room.

[tamiya]

a coin on a pinion gear,,, i'm thinking would increase rotational mass which wouldn't be good for slowing down and speeding up, but would hold high RPMS longer on a big banked oval track where you are running full out it would force the rpms to hold slightly longer going into the bank which over a race would translate into some lead.

you'd think that, using physics, but supposedly things behaved differently on an RC motor

years ago I acquired a tacklebox of pinions from some exracer, he had multiple pinions in each size. He also had brass, steel & alloy versions in each size - some look custom/hand made.

Supposedly a pinion "with more rotating mass" gave better pickup out of corner.

Never got around to testing as my lousy driving would just be inconclusive plus not long after the Brushless era began & wiped the slate clean.

[isobarik]

Funnreading

I timed the brushes to have more timing , i putted them in an Parma Cyclones 2 it was wicked fast my buddies thoughtbthat i drive modified it revved like crazy

Sorry for the spelling iPad auto correct to swedish

Mvh ISO

[Willrcboy]

wow, pretty amazed about this read and all the ins and outs for some extra speed secret... only about 20 years too late
Remembered beck in the 90s i was running Kyosho Cup in the UK and some guys are definitely having the upper hand in terms of speed...
At least the only time i manage to win a trophy was the concours and that was memorable.