Some hubs have a metal cover bolted over the axle, with teeth resembling a gear on the axle flange and corresponding gear-shaped female teeth in the hub. Other axles have conventional flanges that drive the hub with bolts or studs. If your hubs have a bolt-on sheet metal cover over the axle flanges, you've got a "splined hub".
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!