Could I use any 530 chain and just remove the amount of links I need to and use a masterlink? Is 530 refer to the width?
What does rk stand for?
The first number is the chain pitch or amount of eights in the pin to pin center distance of the links. A 530 is a 5/8 inch pitch chain.
The second two numbers show the width of the roller section of the chain in eighth's of an inch with an assumed decimal point between the numbers... So 630 chain is 3/8" wide and 525 chain is 5/16" wide (2.5 eighths)...
520 5/8 inch pitch, 1/4 inch wide...
525 5/8 inch pitch, 5/16 inch wide...
530 5/8 inch pitch, 3/8 inch wide...
The zero at the end actually designates a standard chain. A light duty chain would end in a one.
If the side plates are heavy duty the number will end in an "H".
Rk is a brand designator. DID is also. And, Tsubaki yet another. There are many brands.
I've frequently purchased a longer chain and removed the un-needed links. Grind off the end of the desired pin and punch the pin out the other side. I vise is handy for this operation. Or, you could buy a chain breaker tool. I don't have one, though.
Cheers,