Freewheel jamming my balls
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Freewheel jamming my balls
Hello, I'm having trouble putting a freewheel on a wheel that I want to start using again, it came with my 80's touring bike. Then I had a 6 speed freewheel on the wheel and have since upgraded to a 7 speed one. The freewheel is coming in contact with the bearing cap enough to cause the bearings to bind. I don't think the upgrade would have anything to do with the problem but is there a washer or something that can be used to remedy this problem ? thanks in advance,Bill
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The space allowed for the freewheel on the threaded part of the hub shell has always been pretty standard, and freewheels has enough internal depth that they'd always bottom against against the shoulder, and not touch the face where the dust cap is.
It seems you've found a freewheel that's shallower, which is the problem. With the freewheel mounted, I'll bet that there's a gap behind it and it's not resting flush against the stop shoulder.
The fix is easy. Add a steel spacer behind the freewheel to push it out. The spacer needs to be a bit wider than the gap you had there before, so ensure that there's no contact at all of the end of the shell.
It's possible that the added spacer pushes the freewheel out too far, and there's inadequate space between the outermost sprocket and the frame, in whch case you,ll need to add a spacer to the axle also.
It seems you've found a freewheel that's shallower, which is the problem. With the freewheel mounted, I'll bet that there's a gap behind it and it's not resting flush against the stop shoulder.
The fix is easy. Add a steel spacer behind the freewheel to push it out. The spacer needs to be a bit wider than the gap you had there before, so ensure that there's no contact at all of the end of the shell.
It's possible that the added spacer pushes the freewheel out too far, and there's inadequate space between the outermost sprocket and the frame, in whch case you,ll need to add a spacer to the axle also.
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I had that happen to me when I swapped a 14-28 6 speed for a 13-28 7 speed on my '88 Trek 400 equipped with the stock Maillard hubs. The metal shield pressed onto the bearing cone rubbed on the freewheel. I simply moved the shield in a bit and it solved my problem.
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thanks for your reply, what do you mean by moving the shield ?
#6
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Is this possibly a French hub?
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Reread my earlier post. Screw on the freewheel until it bottoms, see if there's a gap behind it, if so that's your problem and the fix is to put a spacer behind the freewheel.
On a side note. Did you rebuild the hub--- replace or relube the bearings? If so and if they have a retainer, is it possible you installed it backward?
On a side note. Did you rebuild the hub--- replace or relube the bearings? If so and if they have a retainer, is it possible you installed it backward?
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In my case, the shield that keeps foreign particles from entering the hub, was pressed onto the cone. I simply moved it in to eliminate the contact and all was well. I only had light friction between the shield and the freewheel. My ball bearings were not bound tight when the freewheel was spun down.
Last edited by BradH; 01-20-14 at 03:06 PM. Reason: more info
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That's a different design than the OP's hub where the dust cap is pressed into the shell, so the advice isn't applicable here.
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In any case, futzing with the dustcap seems easier than chasing down a well-fitting spacer.
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Reread my earlier post. Screw on the freewheel until it bottoms, see if there's a gap behind it, if so that's your problem and the fix is to put a spacer behind the freewheel.
On a side note. Did you rebuild the hub--- replace or relube the bearings? If so and if they have a retainer, is it possible you installed it backward?
On a side note. Did you rebuild the hub--- replace or relube the bearings? If so and if they have a retainer, is it possible you installed it backward?
#13
Really Old Senior Member
French has a slightly smaller diameter than British.
I wonder if using a "British" threaded FW is allowing it to screw on a bit further than it should???
https://sheldonbrown.com/freewheels.html#threading
I wonder if using a "British" threaded FW is allowing it to screw on a bit further than it should???
https://sheldonbrown.com/freewheels.html#threading
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I tried to say it was unlikely, but I never say impossible. In any case, the OP need only hand tighten the freewheel and see if it bottoms against the thread shoulder as it should, or against the face of the shell, leaving a gap behind it. That will give a definitive answer as to whether he's diagnosed and described it properly, and point the direction to a solution, use a spacer behind, or inside between the inside face of the F/W, and rim of the hub shell.
As I also mentioned, the dustcap shouldn't be able to press against the bearing, so I suggested the possibility that the real problem might be a retainer installed backward.
I'm not psychic, nor am I willing to consider and list every conceivable possibility, so I depend on the descriptions of the problem posted by the person who has the parts in his hands, and suggest remedies accordingly. As such, my answers are only as good as the information provided.
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I beleive I did repack it but I'm pretty sure the bearings were loose. I tried making a spacer, took a tin snips and cut out a washer like piece of metal, wasn't easy and it didn't work,it wasn't thick enough I guess. I wonder if removing one of the bearings would solve the problem?
Is the dust cover (shield) pressed onto the cone like Brad's or into the shell? Everything turns on that (no pun).
If it's part of the axle or cone, then simply tapping it in deeper is the answer. If it's pressed into the shell, you have to check the why the freewheel body is pressing on it, and why it jams.
As I said earlier, you're the only one here who has it in your hands, so the quality of the answer anybody gives depends on the accuracy and completeness of the description.
As for removing a ball, that won't change anything, unless you put in one too many when you rebuilt.
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#17
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Before we go at this to cross purposes, we need an accurate description of the hub and problem.
Is the dust cover (shield) pressed onto the cone like Brad's or into the shell? Everything turns on that (no pun).
If it's part of the axle or cone, then simply tapping it in deeper is the answer. If it's pressed into the shell, you have to check the why the freewheel body is pressing on it, and why it jams.
As I said earlier, you're the only one here who has it in your hands, so the quality of the answer anybody gives depends on the accuracy and completeness of the description.
As for removing a ball, that won't change anything, unless you put in one too many when you rebuilt.
Is the dust cover (shield) pressed onto the cone like Brad's or into the shell? Everything turns on that (no pun).
If it's part of the axle or cone, then simply tapping it in deeper is the answer. If it's pressed into the shell, you have to check the why the freewheel body is pressing on it, and why it jams.
As I said earlier, you're the only one here who has it in your hands, so the quality of the answer anybody gives depends on the accuracy and completeness of the description.
As for removing a ball, that won't change anything, unless you put in one too many when you rebuilt.
Last edited by JTownCitycycle; 01-20-14 at 05:45 PM.
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sorry for the confusion guys, you're always so nice and helpful here ! Here's some photos that I hope help. I think it's just a case of the freewheel pressing against this dust cap over the bearings. I noticed the hub and the wheel that I'm presently using on this bike although not an exact match has a dust cap that is noticeably set down into the shell then the one giving me problems. edited.. the bearings are loose, no retainer.
If you want to know how far it can go remove the balls, and drop the cone into the right side so it rests on the dust cap. Obviously it can't go that far or it would rub, but it can go to within 1mm of that depth.
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#19
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OK, this is exactly like BradH's hub, the freewheel isn't pressing the cap into the bearing, it's simply rubbing on it. Assemble the hub and use a piece of wooded dowel to gently press the cap in a bit deeper. It should be able to go to where it's just slightly sub flush to the shell without rubbing. (if it's straight)
If you want to know how far it can go remove the balls, and drop the cone into the right side so it rests on the dust cap. Obviously it can't go that far or it would rub, but it can go to within 1mm of that depth.
If you want to know how far it can go remove the balls, and drop the cone into the right side so it rests on the dust cap. Obviously it can't go that far or it would rub, but it can go to within 1mm of that depth.