The hub is fully weldable as it’s machined from hollow steel section….it is not a wheel hub that has had the flange machined off. It’s been manufactured specifically as a flangeless hub and is brand new and made in Australia.
Comes with full bearing and seal kit. Dimensions of the hub are 70mm x 100mm.
The hub is mounted on tapered roller bearings which means very smooth operation and no movement. Bearings are sealed and capped for protection from dust, water, etc.
Bearings are the same as on a trailer wheel, so you should never wear them out. Just pack the bearings with grease the same as you would for a wheel.