HRC pilot bore coupling hubs

HRC pilot bore coupling hubs have a pilot bore smaller than the target shaft diameter. After boring it out to size and cutting a keyway, the hub sits on the shaft without an adapter bush, which gives a rigid and accurate connection.

HRC pilot bore coupling hubs - a bore made precisely for your shaft

You make the bore precisely for your shaft, including a non-standard diameter or a larger one than a taper bush of the given size allows. This is a good solution when the hub is to remain on the shaft permanently. If necessary, you can additionally secure the hub with a set screw over the keyway.

HRC hubs with a pilot bore in the full size range

HRC pilot bore hubs in the sizes of the entire system. The hub size must match the size of the insert and the other coupling hub - it is given in the product name.

Combining an HRC pilot bore hub with a Taper-Lock hub - customer questions

Can a pilot bore hub be combined with a Taper-Lock hub?

Yes, if both have the same HRC size. Such an arrangement allows you, for example, to leave the hub permanently on the machine side and use quick bush mounting on the motor side.