Final revision of how the Ti downtube will look...
1936 Monark Silverking Downtube Replacement - The downtube of this aluminum Silverking suffered a fatigue crack and needs to be replaced with something a little tougher. The leftside dropout also needs attention.
1936 Monark Silverking Downtube Replacement - The downtube of this aluminum Silverking suffered a fatigue crack and needs to be replaced with something a little tougher. The leftside dropout also needs attention.
1936 Monark Silverking Downtube Replacement - The downtube of this aluminum Silverking suffered a fatigue crack and needs to be replaced with something a little tougher. The leftside dropout also needs attention.
The dent was present when I got the frame, over time a stress fracture appeared
Committed! Old tube has been removed, working on removing the headtube casting in preparation for replacement. I hope to have this wrapped up in a couple weeks...
Ti stock with sides machined and the crucial dimensions needed for the massive manual machining job ahead
3/4 roughing mill enjoying a Ti chup lunch
Drilling out a steel set pin that secures the casting to the seat tube
Completed frame disassembly
Cleaned up, polished main tubes
Polished top tube
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Monark Tube Repair
The downtube of my 1936 Monark Silverking cracked at an existing dent and the rear dropouts need resurfacing. The broken tube has been removed and will be replaced by a billet Titanium one. The stock has been sitting around for long enough.