(Noob) How to connect the wheel to an axle?

[MrPenguin9]

Firstly, I am sorry for my lack of knowledge. I have tried googling but I couldn't find any straight forward answers. Secondly, I don't know the terminology that well, I have never done anything like this.

Ok, I am trying to build a project based on this(see pic 1) It is basically a balancing one wheeled skateboard. So far the only part I have is a wheel (see pic 2). Now from what I understand, I'm going to need two bearings attached to the body, an axle between them, a sprocket(being spun by a chain to the motor) attached to axle, and I need the wheel connected to the axle. But how do I connect the wheel and sprocket to the axle? I have never welded before. I could try to teach myself, but I think permanently welding the wheel on to the axle could become a problem if need to change the rim/tire. I read about a hub that I can connect from the wheel to the axle, but how do I know if the hub will fit on the rim? (like would this work? Ebay Wheel Hub) Also the hole on the rim is about 45mm, what size axle should I use? (40mm?)

Thank you guys so much!!
Tyler

 

[jdmkid]

yes you would need a hub. just get a shifter kart hub, depending on your axle size. same with the sprocket. they both use hubs, but different hubs.

check out some used parts on here since itll be much cheaper:

http://www.seventh-gear.com/store/

 

[MrPenguin9]

Ok thanks! That website has good prices! How do I know if a hub fits my wheel?

Thanks
Tyler

 

[jdmkid]

hmmm i think its by country, since different countries used different bolt numbers. i may be wrong, but as long as its the same bolt pattern it should fit. dont quote me on this though. id wait for someone like anderkart to pitch in

 

[MrPenguin9]

Oh, ok thanks! By the way, when you said "shifter kart hub" what does shifter mean?

Also what's the most common size axle?

Thanks
Tyler

 

[OzFab]

Oh, ok thanks! By the way, when you said "shifter kart hub" what does shifter mean?

Another name for racing kart

Also what's the most common size axle?

There isn't a "common" size, it depends on class or category. 40mm seems to be a popular size. your best bet is search ebay for "go kart axle" & see what pops up or just wait for anderkart to chime in...

 

[MrPenguin9]

Ok thanks. I forgot to mention I also have purchased the motor (see pic). It uses #25 chain (I think it's 1/4" spacing between each link). I can't seem to find any matching sprocket/hub for #25 chain?

Does anyone know if they make sprockets for #25 chain?

Thanks!
Tyler

 

[OzFab]

I know racing karts use 219 chain (over here at least), that's gotta be close...

 

[MrPenguin9]

Ok. I looked it up, #219 is close, but it's not compatible with #25.

I've spent the whole day looking for a matching #25 sprocket, but still can't find anything.

Thanks
Tyler

 

[Papa P]

Check this out. http://www.surpluscenter.com/sort.asp?catname=powerTrans&keyword=PH25

Papa P.

 

[MrPenguin9]

Thanks, that websites looks like it could be good! I'm thinking that I should get the one with the largest number of tooth. (http://www.surpluscenter.com/item.asp?item=1-2742-72-F&catname=powerTrans)

But I'm confused about one thing, what does it mean when it says "Bored to size, can be bored larger, up to the maximum bore shown." I don't see any option to change the bore?

Thanks
Tyler

 

[landuse]

Thanks, that websites looks like it could be good! I'm thinking that I should get the one with the largest number of tooth. (http://www.surpluscenter.com/item.asp?item=1-2742-72-F&catname=powerTrans)

But I'm confused about one thing, what does it mean when it says "Bored to size, can be bored larger, up to the maximum bore shown." I don't see any option to change the bore?

Thanks
Tyler

What they are saying is that you can have the centre hole made larger, or bored out to a larger diameter. I have had this done with sprockets that had a smaller centre bore diameter than what my jackshaft was. With a sprocket that small, you can only bore it so big. I had to have a sprocket that size bored out quite a bit, so the machinist put a sleeve over the sprocket so that it was still strong. Here is a pic of it

 

[MrPenguin9]

Oh ok thanks! I get it. So would they (surpluscenter) be able to bore it out or would I have to? (I don't know of anyone that would be able to do something like that)

Thanks
Tyler

 

[landuse]

Oh ok thanks! I get it. So would they (surpluscenter) be able to bore it out or would I have to? (I don't know of anyone that would be able to do something like that)

Thanks
Tyler

I doubt surpluscenter would do it if they are just a regular store. You would have to go to a engineering shop and have them do it. You will also need to get it keyed like in my pic I posted. I wouldn't try do something like this myself, because of the sleeve that they had to put around it. I don't think that is easy

 

[MrPenguin9]

Oh ok. So do they just not make regular sprockets for chain #25 or what?

Thanks!
Tyler

 

[landuse]

Oh ok. So do they just not make regular sprockets for chain #25 or what?

Thanks!
Tyler

You do buy #25 sprockets. I am confused, what are you asking. Boring out a sprocket has nothing to do with size, availability or pitch???

 

[anderkart]

Firstly, I am sorry for my lack of knowledge. I have tried googling but I couldn't find any straight forward answers. Secondly, I don't know the terminally that well, I have never done anything like this.

Ok, I am trying to build a project based on this(see pic 1) It is basically a balancing one wheeled skateboard. So far the only part I have is a wheel (see pic 2). Now from what I understand, I'm going to need two bearings attached to the body, an axle between them, a sprocket(being spun by a chain to the motor) attached to axle, and I need the wheel connected to the axle. But how do I connect the wheel and sprocket to the axle? I have never welded before. I could try to teach myself, but I think permanently welding the wheel on to the axle could become a problem if need to change the rim/tire. I read about a hub that I can connect from the wheel to the axle, but how do I know if the hub will fit on the rim? (like would this work? Ebay Wheel Hub) Also the hole on the rim is about 45mm, what size axle should I use? (40mm?)

Thank you guys so much!!
Tyler

Ok thanks! That website has good prices! How do I know if a hub fits my wheel?

Thanks
Tyler

Ok, lets start by you taking some accurate measurements of your rims 3-bolt mounting pattern. I'll need to know if your rim has the metric or American bolt pattern.
You'll find some helpful measuring info at this link: http://www.cometkartsales.com/store/wheels/wheels.htm

Next, do some research and see if you can buy a replacement drive gear for your motor, that is #35 or #219 pitch, not#25. (because It'll be MUCH easier to source a suitable axle sprocket for use with either of those other sized chains!!!) If you find any, I'd sugest you buy one in the lowest tooth-count you can find...

Also, post the overall width of your skateboards deck, so we'll have a better Idea of how long your axle needs to be.

Are you planning on installing brakes?

Once we have all this info, we wont have any problem sourcing all the axle components you'll be needing

 

[MrPenguin9]

You do buy #25 sprockets. I am confused, what are you asking. Boring out a sprocket has nothing to do with size, availability or pitch???

Sorry about the confusing question, I meant a 6 hole sprocket that would attach to a sprocket hub.

Ok, lets start by you taking some accurate measurements of your rims 3-bolt mounting pattern. I'll need to know if your rim has the metric or American bolt pattern.
You'll find some helpful measuring info at this link: http://www.cometkartsales.com/store/wheels/wheels.htm

Ok I dont have any fancy electronic measuring device, but what I measured is:
A=55mm (2.165 inches)
B=45mm (1.771 inches)
Bolt Holes=8mm (0.315 inches)

It looks closest to the American bolt pattern.

Next, do some research and see if you can buy a replacement drive gear for your motor, that is #35 or #219 pitch, not#25. (because It'll be MUCH easier to source a suitable axle sprocket for use with either of those other sized chains!!!) If you find any, I'd sugest you buy one in the lowest tooth-count you can find...

Ok, yeah I've tried looking, but I will try again. Sorry, I'm sure it's simple, but I can't seem to figure out how to take the sprocket off the motor

Also, post the overall width of your skateboards deck, so we'll have a better Idea of how long your axle needs to be.

I haven't made the deck yet, but I'm planning on 12 inches wide.

Are you planning on installing brakes?

Nah, I'm hoping that running the motor in reverse will give me a minor brake.

Once we have all this info, we wont have any problem sourcing all the axle components you'll be needing

Ok! Thank you so much!!

Tyler

 

[landuse]

Sorry about the confusing question, I meant a 6 hole sprocket that would attach to a sprocket hub.

Aaaah. I am not too sure about if they sell them as "plate sprockets".

Nah, I'm hoping that running the motor in reverse will give me a minor brake.

Ok! Thank you so much!!

Tyler

I hope you are not serious

 

[anderkart]

You could use a pair of these 1-1/4" pillow block bearings;
http://www.surpluscenter.com/item.asp?item=1-207-20-P-C&catname=powerTrans
Or these:
http://www.fastenal.com/web/products/detail.ex?sku=0474562
(I'd compare shipping costs for the best overall price...)
______

Then cut/shorten a 1-1/4" axle to the length you need.
The 'Part# 'WMS 1432-36'
1-1/4" Tubular Axle
Aluminum, .250" Wall
36" Long
List $41.25, Sell $39.95'
at this link should work out great:
http://www.out2win.com/catalog/axleus.html

______

This 1-1/4" rear wheel hub should work fine:
http://www.out2win.com/catalog/wheelhubsR.html
Part# ' WMS 6452 = 1-1/4" WMS 6459 = 1" '
WMS Clover Style Rear Hub
Fits: 1-1/4" or 1" Axles.
Includes: 1/4" Hardware.
______

You could use any of the 1-1/4" sprocket hubs listed here:
http://www.out2win.com/catalog/sprkthub.html

And then you'd need a couple short 1/4" x 1/4" keys for the wheel and sprocket hubs. You could buy a 12" length of keystock from most any good hardware store, and use a hacksaw to cut them to the needed length, or simply order your keystock from here: http://www.out2win.com/catalog/axleus.html#7
______

Any of these #35 axle sprockets would fit those sprocket hubs:
http://www.out2win.com/catalog/sprkt_axle.html
(I'd probably go with somewhere around a 60-tooth, if your tire is around 11" tall)
_______

If your motor has a 3/8" diamiter shaft, the drive gear at this link should work:
http://www.electricscooterparts.com/sprockets35chain.html
10 Tooth 3/8" Bore Sprocket for #35 Chain
1-3/8" OD, 3/8" ID. Two set screws.
Item # SPR-3510A

Or this one: http://www.surpluscenter.com/item.asp?item=1-2413-10-AA&catname=powerTrans

If your motor has an 8mm D-shaft: I couldnt find any #35 pitch drive sprockets to fit, but you could try posting a thread/asking the guys over at this forum about that: http://endless-sphere.com/forums/index.php

Or, you could always just find a really good welder/fabricator, and have him perfectly-center/weld one of those 5/8" bore, #35 drive gears to your motors original sprocket...

________

PS:
the drive gear on your motor probably has 1 or 2 Allen head set-screws holding it on. Once those were removed, you'll probably just need to pry the gear off...

________

Those Pillow block bearings have a set screw that you'd simply tighten up against the axle, to hold in place.

Your sprocket hub and wheel hub, would each use their own short key to simply keep them from spinning on the axle. Then both of these hubs will have a bolt that you'd tighten to securely clamp them in place. (like this pic)