[pwd72s]

They are not...different spacing in the link for different saws. Check your yellow pages, see if any specialty saw shops exist near you. I recently bought a new chain for my saw...if memory serves, it was around $25 installed. While you're in the shop ask about buying the proper sized file, and get some tips on sharpening and also adjusting the chain...it's really easy to do once you learn a few tricks. Depending on the type of wood I'm cutting, I can have a need to sharpen often...as little as 1/2 hour of cutting can use a sharpening. The job goes MUCH easier with a sharp saw. Of course, if I hit a rock, or some bozo hammered a nail into the tree, all bets are off. Be careful of that if this is a city tree...kickback or a chain can fly off. You do not want to get bit. Have somebody around while you're cutting...somebody able to drive you to a hospital if you get bitten. When you get tired, rest...accidents are more likely to happen when you're pooped.