Roller chain

Though they're called "attachments" the A-1 or K-1 modifications are integral to the chain - they're modified side plates that allow you to

*attach your stuff* to the chain. You specify the attachments and spacing when you order the chain, or you buy the attachment links and a chain breaker and assemble the chain yourself. McMaster has the parts to do this, see page 925 as a start.

If you need the attachments at every link or every other link, this is often a stock item with the chain manuacturers, and will be much easier and cheaper than doing it yourself. See Tsubaki, for example. You can but it thru a local power transmission distributor.

Ned Simmons

More info? Depends on the chain size you are looking for as well as whether the attacments are spaced or every pitch/every other pitch.

You'll pay through the nose at the local bearing house. Tsubaki is good chain but quite spendy. There are chinese chains out there now that are real crap (as is some from taiwan). personally, I'd call HKK chain. Their stuff is fair priced and seems to be good quality.

If you can steer your project, I'd also seek what is available rather than what you specifically want. One spec is often really common and dirt cheap while something only slightly different would require 12 weeks delivery from Japan.

Koz

oops..forgot in the previous post....if you are building a conveyor with

2 chains that are spanned with some sort of bar or similar: Make sure that the joints where the bar attaches to the chain can flex. Chain has a tolerance of about +/- .003 per pitch (depending on size). This means that in 10 feet of #40 chain for example, one chain could be almost 1-1/2" longer than the other (assuming one is all short and the other all long). Yea, it doesn't happen in the real world that way but it gives a worst case example. In this example, when the cross bar hits the sprockets it will try and twist from one chain to the other and pull the system apart. It happens on a smaller scale too, so just make sure the joints can flex a little.

Koz