Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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I assume you have the axle out of the hub. If so it isn't necessary to remove the cone and you can complete the service leaving it as it is. if the issue is that the cone or axle needs to be replaced, then can you turn it at all, but not get it off, or is it frozen (rusted?) in place?
For those that can turn, but won't come off because of deformed threads on the end of the axle, it a matter of patience. Dip the axle in cutting oil, and work the cone back and forth, holding the axle in a vice, advancing slightly farther over the damaged area with each pass. Don't force it too much, be patient and settle for slow steady progress. BTW- you can make a cheap workable axle vice from an axle nut, split on one side with a hacksaw.
If it's truly frozen in place, sometimes you can break the bond with thermal shock. If you have a french fryer heat the oil to 300° immerse the axle and cone for 5-10 seconds (use a potholder or pliers, your end will heat pretty fast) then quench in a pan of ice water. You can repeat a few times, but be sure the axle is dry before putting back into the oil to avoid spatter. After a few cycles see if the cone will turn. If not, and if you have a replacement, you can split the cone with a grinder and break it off in halves.
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