CHAIN RING creation

[Norcalflat]

Holy shit, I didnt know you cut them out by hand! That is some dedication and patience! Did you have to use a carbide bit to drill the holes?

[ChrisLuxembourg]

@Norcalflat Nope, look at 1:19 ! - I've used modified stone drills, if the material is to hard, drill it stepwise 6mm/8mm/10mm...

[Thepockets88]

this is amazingly awesome O.O

[stani78]

Fantastic work Chris, you are great fabricator !!! :)

[ColdfireNightfire]

What's the biggest chain ring you have made ?

[ChrisLuxembourg]

@ColdfireNightfire 99T

[ColdfireNightfire]

Thank You, Thank You, Thank You, Thank You, :}

My new HPV design was giving me hell. I was useing a standard 21 speed mountain bike gearing and 21st speed feels like 2nd , goes fast but I pedal my butt off . This will help so much.

[ZeroFossilFuel]

Holy smokes, dude! I thought for sure you made that crank sprocket on a CNC. By hand with a die grinder must have taken you days.

[ChrisLuxembourg]

@ZeroFossilFuel Days??? NOPE, I needed now about 4hours, then the chainring is completely finished. It can stay the whole bicycle-life...

[ZeroFossilFuel]

@ChrisLuxembourg For my build so far I've collected (All Shimano) FH-C201 8/9 speed hub, ALIVIO ST-M410 Pr Brake/Shifter 8 x 3 Speed, RD-M360 Acera Derailleur, CS-HG38-81 cassette 8 speed 11-32t. Anxious to start cutting, welding and posting on YouTube.

One more question. What are those two chain idle wheels made from?

[ChrisLuxembourg]

@ZeroFossilFuel Did you mean the 2 idle jockey wheels? They are made out of NYLON plastics. Also you can take jockey wheels made of aluminum, but that's noisy, here the plastic wheels are a better choice!

[ZeroFossilFuel]

@ChrisLuxembourg Yes, Jockey wheels. That's the term I was looking for. Those are not standard parts. Where do you get them?

Also, what size are your tires?

[ChrisLuxembourg]

@ZeroFossilFuel The NYLON-plastic jockeys are standard. If you wanna get a much better choice, you can take "TACX" jockeys, they are with sealed ball bearing!

I ride with Conti tires 28-406 SportContact 20x1 1/8 Reflex...

[ZeroFossilFuel]

@ChrisLuxembourg Perfect! I thought they were 20". The reason I asked is because the rims I'm going to use are 24". That means my crank can be 65T for the same rolling speed as yours with 20" and 78T.

I'll keep looking for idler pulleys. Thanks for all your help!

[ChrisLuxembourg]

@ZeroFossilFuel The best muscle performance is at 90rpm(crank)! BUT, take always a "reserve" with the gears in both directions. For calculations you take the middle gear ,example 22T if you've a 32T-11T cassette....

[TimpBizkit]

I don't think I could pedal a chain ring that big

[ChrisLuxembourg]

@TimpBizkit That depends on the wheel you ride! I ride with 20 inch wheels, then I needed a 30% bigger chain ring...

[TimpBizkit]

@ChrisLuxembourg Yeah good for the small wheel bikes. How much do these chainrings weigh?

[ChrisLuxembourg]

@TimpBizkit That depends how much you'll cut off...

[TheMat1511]

G'day how many tooth is the super size one?

do you have a link where i can get the large saw disc?

cheers

[ChrisLuxembourg]

@TheMat1511 At 2:14 you can see 99 teeth and a diameter of 412mm. My classic wheel at 1:22 has got 83teeth, for this one I've build an aluminum template. So I can create it umpteen times in shortness! All these large saw discs you can get in a DIY superstore.

[canamm]

Thanks for sending the video. I've often wondered how guys make these large rings. Now I know how to make one for my trike!

[TheLiquidKnight]

Superb! Thanks for the link. I never thought of using a saw disc. I was going to scratch mine from a sheet of 4mm Aluminium.

[ChrisLuxembourg]

@TheLiquidKnight The saw disc chainring never gone broken, it's chromium-vanadium steel! 4mm is to much in thickness, you need 2mm or maximum 2.3mm for the chain!

[ChrisLuxembourg]

@ReconHHC

A chainring that never gone broken don't need a recycling.....

[def215]

youre my hero. that is some amazing work that you do.

[kissmyhho]

you have great patience to cut them all out by hand. why not cncmachine?

[ChrisLuxembourg]

With a cnc you'll have good results with aluminium, but this is chromium-vanadium steel. The chain ring should be low-wear!

[kissmyhho]

i was thinking you could drill out the holes and then cut the circle out and be left with spikes that then you can machine nicely. may speed the process up. i need to make one for my electric bike.i may do it with aluminium first! this should be fine for my use !

[ChrisLuxembourg]

Yes, that works, but it doesn't work with hard materials. It's not my first and not my last chain ring, but I know if ONLY ONE sprocket or "spike" is not correct, the holy chain ring is trash!!!

[Odziz]

Nice video and nice job on the chain ring

You are really dangerous with the power tools and the lathe, one slip, look mom no hands!

[ChrisLuxembourg]

:o) LOL....

Almost everything is dangerous, that must not be a power tool...