aluminum instead of brass??? - Page 2

kalkurap · #16 02-05-2007, 10:27 PM

Could you please post some pictures of the gears that you find in the wind-up toys? I am in the market for small gears as well, your photos might help in my search.

I have a couple cassette players mechanisms with me. I havent found any small enough gear in those.

On the other hand, I have a $5 zip-zap clone that you can buy in the local drug stores, and it has 2 tiny bevel gears along with a micro motor and pinion. You might want to give it a try.

BiLLy bOb · #17 02-07-2007, 08:12 AM

i will try to get some pics for you in the next day or 2. thanks for the heads up on the cassette players. ill just forget about them then. ill look for one of those zip zaps next time im in town.

update....
got a few pics last nite but with dial up internet its SLOW to load em up. the satelite net hasnt worked in 3weeks. going to ****ATTEMPT**** to post it.
left front is the MAN cab that im using
red gears are out of the spring action car, no holes in em but i can put holes in em on the mill. the biggest of the gears is just a little smaller than the tire/wheel assembly on the MAN truck.
the white gears are out of the hitec hs55 servo
behind the white gears is the guts from the hs55 servo
left of the hs55 is a standard size servo guts
and the blue servo on the left rear is a hitec hs50 servo....
http://i127.photobucket.com/albums/p...0/DSCN2809.jpg

kalkurap · #18 02-09-2007, 01:14 PM

Thanks for posting the picture. The gears from the spring action car looks interesting. Unfortunately, I may not be use them, I only have a drill press, and it is tough to make a hole that is perfectly centered.

I have a couple of replacement gear sets that I used on my HS81 servo, even the smallest of the gears is a bit bigger than required. I have a HS55 as well, may be I should open it up to look at the gears.

Since you are using the HS55 for the gears, you might want to use its electronics as your ESC. The conversion is simple, and there are some posts on it here on this site.

BiLLy bOb · #19 02-10-2007, 02:28 PM

a drill press should work, get a centering jig for round pieces, mark it and hold the gear in a vice in the drill press. i used to have to do it that way before i finally broke down and bought a mill. currently im *thinking* about using the hs55 parts. my brother is into electronics and its amazing how CHEEP i can buy SMALL electric motors. i'll probably use the servo electronics for a esc for the time being but i do have a couple of esc's on the way from across the big pond. i had the same problem with gear sizes when i tore down my STD size servo. just too big, but he motor and electronics are still usable. im still looking into a few possible sources for gears that i have located using my brothers electronics books. just have to sit down and crunch the numbers to see if they will work. ill let you know as i find out though.

kalkurap · #20 02-13-2007, 01:06 PM

"Centering jig"- that is what I need now. Didn't know what it is called. I am going to findout if I can buy it in any of the local hardware shops like Sears.

I just completed putting some finishing touches of my first ever TTTT, MAN5 truck. It was in build for more than 2 years, I am finally in a position where I am able to drive it around and have some fun. It still needs some small things worked out, but for time being it is going to stay like that.

I just realised how realistic and scale looking and driving this truck is compared to any other RC model I have ever owened. I think this is the real attraction of TTTT. I am really motivated to build my second model, so the search for the gears continues!

I found a couple of really small gearboxrs online, but they aren't cheap at about $20 with motor:
http://www.solarbotics.com/products/...egoryzq37=true

I also have some gearhead motors similar to this:
http://www.solarbotics.com/products/...egoryzq37=true

They came off of an old computer tape drive unit. They have about 4 or so really tiny metal bevel gears inside. The gears seem to be of very high quality with really fine pitch. The only problem is the motor is a big too large to 1/87 scale. And I don't feel like taking them apart because it is such a nice piece of equipment, every time I take it apart, I end up putting it back together!!

BiLLy bOb · #21 02-15-2007, 10:39 AM

here is a web site to check out for some gears. we just got home from our injection molding shop north of chicago where i was referenced to this web site. waiting to receive a new catalog from them.

www.wmberg.com

the master catalog he had, had lots of small gears. thanks for the solarbotics site. my brother has ordered from them before but i have never poked around the web site to locate the motors and gears you have found. i would love to see some pics of your truck.

my brother had some papers downloaded for electric motors for me but he has misplaced the papers. I will try to find them and post the info for you. they had pager motors for under $1 and lots of other small electronic stuff.

***update***
here is a link or 2 you might be interested in.

www.micromark.com they have tons of stuff for TINY hobbies including at least 2 different centering jigs.

www.mcmaster.com and www.grainger.com both have TONS of stuff that is useful. tools, fabrication supplys, solder, etc.etc.etc.etc.......

kalkurap · #22 02-20-2007, 12:52 PM

Took some pictures of the MAN truck over the weekend, but I haven't uploaded them here yet. I just noticed that TinyRC doesn't have an FTP service, so I need to sign up with a photo hosting service!

Also started on a 1:72 Dingo armored transporter (a revell kit), may not be strictly a TTTT because of its scale (although not sure about it). But I have been spending a lot of in the college, and the progress has been slow.

Bought 12 bit motors (similar to zip-zap motors, I hope) with the pinion and an additional spur gears from eBay for $15 including shipping, not a bad deal. So, waiting for them to arrive as well.

BiLLy bOb · #23 02-21-2007, 05:36 PM

hope those bit motors are what yer lookin for. i personally use photoshop for the time or 2 that i need a photo service. im of the opinion that if what you want to build is in 1/72 scale instead of HO, so be it, its the creativity and effort that goes into it that counts to me. im still trying to find the papers we downloaded and printed with the cheep pager motors. havnt made much progress on mine either. was gone for a week to chicago in the middle of the snow storm they just had. that was cool though. hope to maybe go out and play on the mill with the gears in the next day or 2. will just have to wait n see what happens.

kalkurap · #24 02-21-2007, 09:45 PM

Posted some pictures on the gallery forum. Let me know if have trouble locating the thread.

Thanks for the links you posted. Micromark has some really cool 2mm U-joints. Probably too big for TTTT, but can be used in other projects. My wife bought me a table wice, soldering flux, scribing tool and punch for the valentines day, they are really nice. I will post some pictures of the progress of the Dingo some other day.

BiLLy bOb · #25 02-23-2007, 10:49 AM

[quote=kalkurap;201187]Posted some pictures on the gallery forum. Let me know if have trouble locating the thread.

color me dumb or just a ol hillbilly but i have no idea where to find that forum at. if ya could shoot me a link id sure appreciate it.

a wife to buy those goodies for v-day, wow, thats great.

kalkurap · #26 02-23-2007, 01:05 PM

There is a seperate forum for posting the pictures called "TTTT Gallery", although it is probably OK to post pictures here. Here is the link to the thread:

http://www.tinyrc.com/forums/showthread.php?t=23176

BiLLy bOb · #27 02-27-2007, 06:00 PM

gosh i have forgot how nice fast internet is. satelite has been down for 6 weeks. finally got it up today. those pics are cool. i pulled apart the drive trucks in a N gauge *backman* brand locomotive. one motor driving workgears to both front n back drive units. the gears look like they have some great potential. problem is a locomotive is expensive unless you come across one used cheep.

killer · #28 03-01-2007, 06:28 AM

nice work guys!.. micro servo gear sets can be bought seperately, this is what i use on my trucks!.., pull back cars is a good source of gearsets but you need to drill a hole on the middle of the gears, drilling it right on the center spot could be tricky, and if you miss the spot, the gears wont mesh properly!.

BiLLy bOb · #29 03-02-2007, 10:49 PM

killer, i was hoping you would chime in sometime. hows the weather over there? the wife is from cayagan de oro. thats some cool work you do. your right, drilling a center hole in a gear can be quite interesting. been messing around with the servo gears on the mill making a custom transmission using aluminum bar stock. once i get it perfected and working smooth, then ill transfer everything into a piece of brass stock. have 30 some feet of 1/4 square aluminum so its FAR cheeper for me right now to chew up, errr, ahhh i meant "mill/machine" the aluminum!!!

killer · #30 03-04-2007, 03:21 AM

Quote:

Originally Posted by BiLLy bOb

killer, i was hoping you would chime in sometime. hows the weather over there? the wife is from cayagan de oro. thats some cool work you do. your right, drilling a center hole in a gear can be quite interesting. been messing around with the servo gears on the mill making a custom transmission using aluminum bar stock. once i get it perfected and working smooth, then ill transfer everything into a piece of brass stock. have 30 some feet of 1/4 square aluminum so its FAR cheeper for me right now to chew up, errr, ahhh i meant "mill/machine" the aluminum!!!

hello billy_bob!, how are you sir?.. am staying here in malate and working here at Pan Pacific Hotel, been very busy this days, it's summer here so if you have a chance to visit the Philippines, this is the perfect time!.. the problem i see working with aluminum is that you can't solder it together or you need a special machine to put those things together aside from using a screw, yep a lot of patience will be neede to get those a perfect center hole on modified gears, but normaly servo gearsets have holes in the middle you just need to find a perfect size pin that will fit right through it, cause to sloppy will cause the gears to slip!.. hey this site is becoming intresting again, i hope to see some pics of your project soon bro!..