Thread engagement
10-19-18 | 07:15 PM
#1
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Thread engagement
I recently had my rear hub serviced by a bike shop, and just replaced the nuts too since they were worn. When I threaded the nut onto the axle, it doesn't go on all the way. Is it unsafe to ride like that?
Dave
10-19-18 | 08:32 PM
#2
Lapped 3x
Joined: Dec 2004
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From: 43.2330941,-79.8022037,17
You're ok if the first 3-4 threads are engaged. This is where most (roughly 90%) of a threads holding power is, even on deeper engagements. Ideally, you want minimally 1-2 threads showing past the nut. This is the standard minimum for bolted connections in the industrial world.
Also, is it a new axle? and are the thread engagements the same on the other side? If it's short on both sides, methinks that maybe they installed a bolted track axle on a road width hub, since it's a conversion. In other words, the axle is too short by ~3mm on each side.
Also, is it a new axle? and are the thread engagements the same on the other side? If it's short on both sides, methinks that maybe they installed a bolted track axle on a road width hub, since it's a conversion. In other words, the axle is too short by ~3mm on each side.
10-19-18 | 09:45 PM
#3
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The picture looks like it's taken from the NDS, so it must be a flip-flop hub. Is that right? Are there extra spacers or washers that don't need to be there? Otherwise, I've found that longer solid axles are readily available, just have to be sure of matching the threads. Also, see the thread about track nuts -- the ones with floating washers are indeed preferable, but might have less thread engagement unless you have a longer axle.
10-20-18 | 12:39 AM
#4
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The picture looks like it's taken from the NDS, so it must be a flip-flop hub. Is that right? Are there extra spacers or washers that don't need to be there? Otherwise, I've found that longer solid axles are readily available, just have to be sure of matching the threads. Also, see the thread about track nuts -- the ones with floating washers are indeed preferable, but might have less thread engagement unless you have a longer axle.
Dave
10-20-18 | 06:25 AM
#5
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From: Telford, PA
Bikes: Pinarello FP Due, Cesare track bike modified for the street.
You're ok if the first 3-4 threads are engaged. This is where most (roughly 90%) of a threads holding power is, even on deeper engagements. Ideally, you want minimally 1-2 threads showing past the nut. This is the standard minimum for bolted connections in the industrial world.
Also, is it a new axle? and are the thread engagements the same on the other side? If it's short on both sides, methinks that maybe they installed a bolted track axle on a road width hub, since it's a conversion. In other words, the axle is too short by ~3mm on each side.
Also, is it a new axle? and are the thread engagements the same on the other side? If it's short on both sides, methinks that maybe they installed a bolted track axle on a road width hub, since it's a conversion. In other words, the axle is too short by ~3mm on each side.
10-20-18 | 07:06 AM
#6
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I agree with the above. However, we could help you out better if you showed both sided. Are there two nuts on the other side? This is strange. You may just need to have the axle adjusted so it is even on both sides with one nut. Perhaps something is wonky with the axle and it will only work when pushed to one side. Send a picture of the other side please.
10-20-18 | 08:34 AM
#8
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Dave
10-20-18 | 08:55 AM
#9
Veteran Racer
Joined: Jul 2009
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From: Ciudad de Vacas, Tejas
Bikes: 34 frames + 80 wheels
10-20-18 | 09:02 AM
#10
aire díthrub
Joined: Sep 2017
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From: chatham-savannah
Bikes: Raleigh Competition, Pashley Roadster Sovereign, Mercian Vincitore Speciale
id be very surprised if this isn’t the issue
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