04-23-2016, 06:56 PM
I should have noticed you're from the sane part of the world that uses the metric system.
Anyway the set screw is not far enough off to cause any problems. If I cut a keyway and need to drill & tap dead on center I'll cut a key seat on a mill in an appropriate sized shaft and mount the pulley, gear etc on the shaft. Then it easy easy to align the hole & the keyway.
BTW, having the keyway and the key seat on center is much more important than the location of the set screw. If one or the other or even worse both are off center one will need to hand fit the key reducing its strength, and making for a poor fit. Each & every time the shaft starts excessive force will be applied to one side of the key eventually resulting in key, key way, and/or key seat failure.
Anyway the set screw is not far enough off to cause any problems. If I cut a keyway and need to drill & tap dead on center I'll cut a key seat on a mill in an appropriate sized shaft and mount the pulley, gear etc on the shaft. Then it easy easy to align the hole & the keyway.
BTW, having the keyway and the key seat on center is much more important than the location of the set screw. If one or the other or even worse both are off center one will need to hand fit the key reducing its strength, and making for a poor fit. Each & every time the shaft starts excessive force will be applied to one side of the key eventually resulting in key, key way, and/or key seat failure.