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

[Toadstool Food]

here you go... http://www.z1enterprises.com/reference/chaintypesize.aspx

Now that IS good information that is worth repeating?

 

[GregT]

Yes, that is good info.

Just to throw you again though 630 when it was introduced used a bigger OD roller - don't know about the current stuff as I haven't felt the need to use it.The better quality 530 available from the mid 80's made 630 obsolete IMO.

If you're looking for an odd size wheel sprocket, buy a blank in the size you want and machine the center to suit your sprocket carrier.
530 blanks are generally cheaper as there's a bigger demand for this size chain so again, they can be narrowed to suit 525/520.

#50 industrial chain is nominal 5/8 X 3/8 and I have used #50 blanks which come with a boss as the basis for offset front sprockets - and yes,narrowed as well.

Sprocket hardness - I said they should be softened before machining and said how to reharden - this works...
That said, I've got racebike sprockets here I've never bothered to reharden and after seasons of use they're still good.
Attention to chain tension and regular lube is the key of course.