Can a 530 sprocket be milled down to accept a 520 chain?

[makenzie71]

As posted about earlier, I'm having issues finding the right steel sprocket for my bike. However, I can find a 530. Another issue I'm having is a 2mm gap I have to make up. I was going to put a shim plate behind my sprocket, but now I'm thinking if I can just shave a couple mm off the 530 sprocket I'll get my offset without any shims.

Will it work, or are there more differences than that between the 530 and 520 sizes?

[GregT]

Yes, you can turn a 530 sprocket into a 520.
Generally it's done on a lathe - so turned, not milled.
I find that if you soften the sprocket first it machines much easier.
Heat to cherry red & allow to cool in air at room temp wil soften it enough.
After machining,incl putting the side curvature on the teeth and deburring with a chainsaw file, reheat to cherry red & quench in oil.

The Suzuki spline pattern is common across several manufacturers - I use aftermarket sprockets in this pattern for quite a number of bikes - narrowed to 525 or 520.

[makenzie71]

Thanks! (plus some to make it 10 characters)

[makenzie71]

...however, I just learned it's a lot of work for something I could still spend less money on and shim up. WR250F sprockets work...just have to drill out the bolt holes a couple sizes bigger.

[GregT]

Fair enough - as I said that spline pattern is common.

Why I use the 530 sprockets and narrow them is because often the dirt bike 520/525's are not available in the sizes i require. When you're looking for a 17 tooth and up sprocket, dirt bikes don't go this big.

[trippivot]

No no no

the first number is the link WIDTH! the next 2 numbers are the LENGTH!

530 - 525 - 520 are the same widthbut different link length (pin to pin)

630 sprocket can be changed to 530 by making the width of the sprocket less(630 = 530) using a surface broach / end mill

with a pin length difference the individual teeth size has to be changed.


no you can not make 520 and 530 work together.- unless you weld up every tooth and re-cut every arc to accept a shorter pin to pin length.

[makenzie71]

Actually, the first number is the series (5 being 50 series), and the last two numbers are the width. If you would like, I have 530, 525, and 520 sprockets all out in my garage and can post pics of them with mics on them showing that they certainly are not the same width.

[trippivot]

size 50 chain is 630 2 different measuring scales American and metric

[trippivot]

not to be confused with 530 525 and 520 not 50 series PAL do some more true research.



630 is the same length as 530
difference being the WIDTH

520 525 530 are the same width different pin to pin lengths

it is worth repeating GOOD INFORMATION

[Darkstang]

I do not know where you are getting your info, but my friend it is wrong. Not trying to be an a$$, but 530 and 525 and 520 are all the same distance from link to link. Width from link side plate to side plate is what is difference.

I can take a 530 chain and it will fit pitch wise/link wise sprockets for both 525 and 520. Just has a lot of side to side play as they are narrower. A 630 WILL not even mesh up on any of the 5 series sprockets.

ken

here you go... http://www.z1enterprises.com/referen...ntypesize.aspx

[Nessism]

The first number 5, stands for 5/8" pitch (length) between pins. A 630 chain has a 6/8" (3/4") pitch. The second two numbers relate to width, again in 8'ths. So 530 and 630 are the same 3/8" width, but the pitch between links is longer on 630. Bottom line is a 530 sprocket could be shaved to work on a 525 or 520 chain, but I don't recommend it since the surface hardness will be removed.

[fnkvn]

not to be confused with 530 525 and 520 not 50 series PAL do some more true research.



630 is the same length as 530
difference being the WIDTH

520 525 530 are the same width different pin to pin lengths

it is worth repeating GOOD INFORMATION

530 sprockets and 520 sprockets have EXACTLY THE SAME tooth profiles, but the 530 sprocket is thicker than the 520. I have made many sprockets from scratch, so this info does not come without experience.

[cvmgtwowheels]

Why wouldn't you just buy the right chain for the right sprocket, or the right sprocket for the chain?

[makenzie71]

Why wouldn't you just buy the right chain for the right sprocket, or the right sprocket for the chain?

Find me a steel 38 tooth 520 sprocket made for the YZF600R Thundercat.

[cvmgtwowheels]

What year? Why 38 tooth?