These early Phil hubs are held together with Loctite. The axle is 5 pieces, a hollow center sleeve, two end caps with short tubes that fit inside of the bearings. These are press fit. The hub body is made with clearance between the three non drive flanges, all exactly the same by the way, and the shells. The drive side flange is internally threaded and the rear shell has the freewheel thread extending to the inside of where the flange screws on. All of these flanges are held on with Loctite. The axle assemblies are also held into the hub shells with Loctite only. The Loctite joints can be removed using heat. It's kind of a Rube Goldberg design, but in practice it works without issue. Jim Merz