Has anyone here ever bought a Rack and Pinion from McMasterCarr?
I got 4 foot rack lengths of 14.5 deg, 12 pitch (Part No 6295K142). I also ordered 2 spur gears that are 14.5 deg, 12 pitch, 1" diameter (Part No 6325k22).
However, when trying to roll the spur gear down the rack it seems to stick now and then. The spur gears do not always mesh smoothly with the rack. In fact, the spur gears have bulbous ends on the spurs. In a way, it looks as if they are supposed to exactly fit each other. But the snags scare me. So, is this something that "rides up with wear" or have I been cheated with bad racks or pinions?
Is this what it is supposed to look like?
