anyone think of a microsizer differental
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SPORTCAR
- Posts: 14
- Joined: Sat Dec 20, 2003 10:31 am
- Location: Canada
Hi,
At the link below is the magnetic plate-based tensioner diff picture & construction details. It works exactly like crazydave's picture, except it just uses a rare-earth magnet to create the tension thereby making for few parts. (the magnet is cheap at Lee Valley Tools, a mail order company, located in Canada)
As an added bonus, when you pull it apart, you're not running to find the balls: they hang out with the magnetizm... (Anyone got a source on 1/16" ball bearings? I got mine from cutting a real bearing set apart).
How made & picture:
http://tinyrc.com/forums/showthread.php ... post152440
How the devil do I get a picture up on this site? I don't have a place to 'web host it and link to' per the help.
Brett a.k.a shooterb
At the link below is the magnetic plate-based tensioner diff picture & construction details. It works exactly like crazydave's picture, except it just uses a rare-earth magnet to create the tension thereby making for few parts. (the magnet is cheap at Lee Valley Tools, a mail order company, located in Canada)
As an added bonus, when you pull it apart, you're not running to find the balls: they hang out with the magnetizm... (Anyone got a source on 1/16" ball bearings? I got mine from cutting a real bearing set apart).
How made & picture:
http://tinyrc.com/forums/showthread.php ... post152440
How the devil do I get a picture up on this site? I don't have a place to 'web host it and link to' per the help.
Brett a.k.a shooterb
Yeah. Like that.
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potentiality
- Posts: 9
- Joined: Fri Dec 26, 2003 7:30 am
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SPORTCAR
- Posts: 14
- Joined: Sat Dec 20, 2003 10:31 am
- Location: Canada
Sure will, but I invite anyone who enjoys making small things to give it a try.
Once you have the bearings, magnet, and steel disc, the described diff can be made with a drill, a dremel, a soldering iron, a .25" mill bit, some glue and an hour of your time.
I made a tighter spec one, still using the three balls and a thicker steel plate (for more tension: worked). I've got it in my dual celled ZZ and it was built with a red gear. Even the bit of loss in the diff is way worth it with the better cornering. I think it may improve acceleration because the plates soak up some of the initial torque that causes the back end to go squirrelly normally but I haven't timed this. I made this one to go on my uA SE with Li Poly I'm awaiting excitedly.
There is something to be said for the adjustable tension this magnetic design doesn't have... But its a noticeable upgrade and it stays on my racing version.
I'll ask a couple of my family members about getting it manufactured; my stepdad's got an injection moulding company, my dad's got a precision assembly factory. Maybe I could make a kit with two of each red, green and blue gears, some graphite dust lubricant and, say, an extra 6 balls in case of loss. This with a stainless tweezer (i.e. non-magnetic for placing the balls) and a page or two of instructions (how it works, how to clean it, lubricate it, etc. would be the kit). Warranty: I'd replace anything defective for a year.
If I can get this going, I'll send a few sample handmade kits out to some of the forum's technical posters and see what they write. If they write nice things, I'll make 'em and see if the online shops will sell them or ebay.
Have a great one,
Brett
Once you have the bearings, magnet, and steel disc, the described diff can be made with a drill, a dremel, a soldering iron, a .25" mill bit, some glue and an hour of your time.
I made a tighter spec one, still using the three balls and a thicker steel plate (for more tension: worked). I've got it in my dual celled ZZ and it was built with a red gear. Even the bit of loss in the diff is way worth it with the better cornering. I think it may improve acceleration because the plates soak up some of the initial torque that causes the back end to go squirrelly normally but I haven't timed this. I made this one to go on my uA SE with Li Poly I'm awaiting excitedly.
There is something to be said for the adjustable tension this magnetic design doesn't have... But its a noticeable upgrade and it stays on my racing version.
I'll ask a couple of my family members about getting it manufactured; my stepdad's got an injection moulding company, my dad's got a precision assembly factory. Maybe I could make a kit with two of each red, green and blue gears, some graphite dust lubricant and, say, an extra 6 balls in case of loss. This with a stainless tweezer (i.e. non-magnetic for placing the balls) and a page or two of instructions (how it works, how to clean it, lubricate it, etc. would be the kit). Warranty: I'd replace anything defective for a year.
If I can get this going, I'll send a few sample handmade kits out to some of the forum's technical posters and see what they write. If they write nice things, I'll make 'em and see if the online shops will sell them or ebay.
Have a great one,
Brett
Yeah. Like that.
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Cheesehead
- bitPlaya'
- Posts: 116
- Joined: Wed Jan 14, 2004 8:00 pm
Give me one of them things an I'll write up a review!
I can't afford too much though. Then again....putting one of the diff's on a Fetted ZZSE with a Li-Ion cell would be great. I have to admit that having a 2.5" long car that can out-run and out-turn a car four times the size would be GREAT.
I can't afford too much though. Then again....putting one of the diff's on a Fetted ZZSE with a Li-Ion cell would be great. I have to admit that having a 2.5" long car that can out-run and out-turn a car four times the size would be GREAT.
Lithiums are great!
Triple the speed...
four times the duration....
And they explode if you crash them too hard!
GWS 4 EVR
-my future car's bumper vanity plate
Triple the speed...
four times the duration....
And they explode if you crash them too hard!
GWS 4 EVR
-my future car's bumper vanity plate