Bicycle Mechanics - Stuck Cone nut
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07-30-10, 04:30 AM
well basically one of the cone nuts on my front wheel axel is jammed the other one is loose.
is there any way of getting the jammed one off.
07-30-10, 04:57 AM
Assuming you have been able to take the lock nut on the jammed side off: bind the lock nut on the loose side as hard as you can against the cone. Now use two cone spanners on the cones, since the loose one is held by the lock nut the other one should move first.
I'm assuming you've already used penetrating oil on the threads.
If the above doesn't work first go, throw the whole assembly in the freezer for an hour then take it out and heat only the tight cone with a propane torch and try again.
07-30-10, 06:23 AM
Ive have now discovered that releasing the nut is near impossible as to be able to get enough leverage to loosen it you have to tighten on the other nut on the other side then the nut youve just used for the leverage is too tight! any idea?
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.
07-30-10, 08:05 AM
Is this wheel off an old Raleigh or other three speed?
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