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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #11  
Old 3 Weeks Ago
KCinSB KCinSB is offline
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Thanks for all the input! I'll pass on that welding idea. It was just a though since the "local" supplier mentioned it, and he is slow to ship things.....
I have a fair amount of aircraft riveting experience, and the idea of using a hammer on the end of the rivet is the hangup in my mind. I have a press setup that will aid in the holding on to it while working issue, but still less than ideal. The rivets are in Shear mode, not tensile (pulling), so the need to swell the shank in the hole by driving the head against a bucking bar on the shop head is best. If you drive the rivet head against the cast iron brake drum flange, the force will be absorbed by the mass of the drum and not swell the shank against a bucking bar. All that said, the only way to install them is to peen the ends on the sprocket side, like with a hammer as mentioned. That will keep them from falling out, but not swell the shank, fill the hole, and make them a weak fastener. Loose from the very beginning, which is likely why they were not a good factory process in the first place.
I'll get it done. I've already lost 2 weekends trying to get the plan put into a fix! Just do it!
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Old 3 Weeks Ago
Iron Mike Iron Mike is offline
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There is no direct force on the drum when riveting. The "bucking bar" procedure is the factory procedure. Just not a handheld bar you may be used to. Look in your manual, there is a perfectly clear pic of the tool used and offered by the factory (used to be).
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  #13  
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Here’s my setup









The rivets are a close fit to start with. Then you swell them so everything pinches, you have four screws holding everything anyway. Then beat away until the rivet sits below sprocket surface, or use a press if you have one. I started with a medium size hammer and thought my rivets were defective for a while, then the previous poster ^^ told me to get a BIG hammer.

If you haven’t already seen the thread in the stickies, have a look. Other members here could do this one handed.
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