HT Motor + Shift Kit + 6V/12V generator

[AussieSteve]

I just spent half the afternoon searching (eBay) for potential belts and pulleys.
Maybe I was using the wrong search terms or something, but found nothing suitable.
I think that a v-belt would be best, but I'm open to suggestions.
Also, the pulley on the generator would be best if it was metal.
I considered a small timing belt and pulleys, but I'm not sure if that type would stay on at the speed.
Can anyone point me in the direction of a supplier of this sort of stuff?
For the generator end, I'm after a couple of pulleys, in a couple of sizes about 10mm to 15mm diameter to suit a 3.175mm, (1/8"), shaft.
For the jackshaft, a couple of pulleys from about 80mm to 120mm diameter would be good.

Any help appreciated,

... Steve

 

[Fabian]

Hi Steve

Have you considered toothed belts out of 1/8 scale R/C cars.
Those things are very strong and just don't seem to stretch.

Fabian

 

[AussieSteve]

That's the sort of thing I've been looking at. Those actual belts and pulleys aren't suitable, the belts are too short and the pulleys don't come in the right sizes. eg. I need a 100mm to 120mm pulley for the jackshaft.
As spare parts for RC cars, they're sold mostly by part number and not by length, pitch, etc.
I'm not sure if timing belts will work well at high rpm, either.
I found a place called MiniBearingsAustralia last night. They have a great range of belts and small pulleys, both notched and timing styles, but none in 100mm+.
I was thinking v-belts, but most that I've seen won't go around a really small ~10mm pulley.

The search continues.

... Steve

 

[gothicguy64]

belts

I just spent half the afternoon searching (eBay) for potential belts and pulleys.
Maybe I was using the wrong search terms or something, but found nothing suitable.
I think that a v-belt would be best, but I'm open to suggestions.
Also, the pulley on the generator would be best if it was metal.
I considered a small timing belt and pulleys, but I'm not sure if that type would stay on at the speed.
Can anyone point me in the direction of a supplier of this sort of stuff?
For the generator end, I'm after a couple of pulleys, in a couple of sizes about 10mm to 15mm diameter to suit a 3.175mm, (1/8"), shaft.
For the jackshaft, a couple of pulleys from about 80mm to 120mm diameter would be good.

Any help appreciated,

... Steve

have you tried a modelshop like as model planes cars ?
hi buddy i think its a great idea im watching with great intrest
ohhh as for my built num 2 ,,,,i found a frame mtx1 cell i have the wheel an rotor of num 1.
the exhaust i ran orig was a stock drilled an cut by tony
i got poo poo off goege an it mades 2x bottom an mid but looses 10 at top
i ould blast off after 2 pedals and leave cars standing for 40khp was funny
i intend to add the jackshaft as well
..
if not i,ll run a 36 tooth rear

 

[AussieSteve]

Howdy, Brad.
There aren't any model shops that I'm aware of in this area, within riding distance.
I've checked out a couple of online shops but they didn't have much.
I'll have another look at MiniBearingsAustralia later. I might be able to get the generator pulley and belt from them, then just find another supplier for the jackshaft pulley.
I've got to bottle a batch of my home brew now, but later when I get time I'll continue the search.

With the jackshaft, you'll be able to leave the cars behind to 50kph. Much safer, you can sit in the traffic stream on 50kph roads - much safer than riding in the gutter.
It's great being able to idle along at walking pace in 1st, too.

... Steve

 

[wildemere]

"Razor" scooter wheels are urethane and are 100mm, the center hole is 20mm, you could friction drive the generater from this wheel using a rubber roller on the generator. Or machine a groove in it and use the band and drive pin from an old upright Hoover or similar appliance.

Have you thought about friction driving it from the back wheel? On a spring loaded mount? Like a bottle dynamo mounted sideways.

 

[AussieSteve]

- I realised that I can't go above 80mm for the jackshaft pulley. Also a scooter wheel is too wide for the space and very hard to attach properly to the jackshaft.
- A belt drive is better for the setup I'm planning - I wouldn't even consider a friction drive - harder to set up and more problems.
- No I haven't considered running a home-made bottle-type dynamo friction-driven off the rear wheel. I can buy one of those ready made.

I'll need a bit better belt than an old hoover one - this will be spinning the generator over at up to 10,000rpm and have a fair bit of load on it at times.
I'm looking at modern reinforced belts. I'm leaning toward timing belts more, now, because v-belts don't run well around extra-small pulleys.
Since only an 80mm pulley fits the jackshaft well, the generator pulley needs to be ~8mm+.

No offense, but I've worked out my design and didn't ask for help there, only if anyone knew of suppliers of belts and a range of pulleys.
I'll need to buy a few sizes to dial in the gearing. I'm still working my way through MiniBearingsAustralia, a slow, hard-to-navigate site, but I'm starting to find what I'm looking for. If I can find them, I'll get an 80mm for the jackshaft and an 8mm, 10mm, 12mm and 14mm for the motor. That should get me in the ballpark.

At MBA:-
Found a suitable 10mm timing pulley - $18
Also probably need at least 12mm and 14mm for testing - $42
And an 80mm pulley, (this will need boring to suit the jackshaft). - $34
A timing belt to suit - $10

It's hard to spend that much on the belt & pulleys, but use a cheap $10 motor.
By the time I get a quality motor and the above, this will cost me an arm and a leg.
(Still needs the battery and electronics on top of that.)

Unless a reasonably-priced belt and pulleys turn up, I'm done with this.
I've spent over 12 hours now, just looking for them.

... Steve

 

[AussieSteve]

Since the pulleys will be so expensive, I've decided to do this properly and fully test the motor for output first, then I only need to buy (the correct) 2 pulleys and one belt.

Did my first tests and they're fairly promising, power-wise, but I have no idea of rpm, so I just stretched the budget and bought a digital optical tacho. (A good toy to have around for other stuff.)
I've been running the generator pretty slowly for testing so far.
Measurements indicate that if I can run the generator at 4 times today's test speed, I'll get 49W at 12V. Just need to know how fast I'm running it before I up the speed too much.

Still after cheaper pulleys.
(Maybe I should just go the whole hog, use a bigger motor and small chain and sprockets then make a starter-motor/generator like on some ride-on mowers?)

The saga continues.

... Steve

 

[breaksalltherules]

www.mcmaster.com has lots of different pulleys and belts. They do alot of custom stuff as well.

 

[AussieSteve]

Thanks, breaksalltherules, I just checked out McMaster-Carr.
A much easier site to navigate, but similar prices.
ie. $39US for the jackshaft pulley, $9US for the generator pulley.
Great range of stuff, though.

At this point, it looks like I'll probably be buying the ones from MiniBearingsAustralia.
First, a new multimeter, it seems, before I can do much more. It died of old age last night.
Gotta wait for the tacho anyway, so I'll put things on hold until then.

... Steve