40BB17H-1/2''Bore 17 Tooth Idler Sprocket for 40 Roller Chain

using it to replace a very poorly designed sprocket on a snow blower it looks like I might not ever have to replace them again I had to replace the other ones about ever two years at twice the price.

The media could not be loaded.  This idler sprocket appears to be of good quality. I have installed it in a very harsh location in a chain tensioner so we will see as to its longevity.

It fits the #40 chain perfectly and makes the grate rise and lower smoothly.

Perfect idler pulley

This was just as described and fit the chains I already had.