CD spinner Hubs

R

Robotnik

Guest
I don't know if this is the correct term for it or not... I'm referring to
the part of a cd drive or cd player that the disc is held in place by
(either by gravity, or snaps).

Is there a way to remove these from the axle of the motor that spins the
disc? I have a cd drive that I'm taking apart...and I want to put a snap in
hub on it and remove the one that is currently on it.

I figure they are just press fitted.

Thanks

Nic
 
Robotnik:
Hub is the correct name of the part.
Most hubs are "just" press fit and a very few have an obvious set screw.
Note that on some spindle motor shafts, the press fit hub is a bear to
remove without breaking the hub or bending the spindle motor shaft.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
------------------------------


"Robotnik" <chickenmonkey@asdf.com> wrote in message
news:O93Mb.1567$VS4.47266@bgtnsc04-news.ops.worldnet.att.net...
I don't know if this is the correct term for it or not... I'm referring to
the part of a cd drive or cd player that the disc is held in place by
(either by gravity, or snaps).

Is there a way to remove these from the axle of the motor that spins the
disc? I have a cd drive that I'm taking apart...and I want to put a snap
in
hub on it and remove the one that is currently on it.

I figure they are just press fitted.

Thanks

Nic
Click to expand...
 
I figured it would be hard to remove, but I thought I'd check to see if
there were any obvious fasteners holding them on... I was afraid to pry them
off, also afraid of breaking the hub or bending the shaft. But, it looks
like that's what it'll take. I'll just have to be carefull I suppose. But
nothing real expensive that I'm working with... so no big deal if I tear
them up.

Thanks

Nic

"Sofie" <sofie@olypen.com> wrote in message
news:1001irhbvklq618@corp.supernews.com...
Robotnik:
Hub is the correct name of the part.
Most hubs are "just" press fit and a very few have an obvious set screw.
Note that on some spindle motor shafts, the press fit hub is a bear to
remove without breaking the hub or bending the spindle motor shaft.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
------------------------------


"Robotnik" <chickenmonkey@asdf.com> wrote in message
news:O93Mb.1567$VS4.47266@bgtnsc04-news.ops.worldnet.att.net...
I don't know if this is the correct term for it or not... I'm referring
to
the part of a cd drive or cd player that the disc is held in place by
(either by gravity, or snaps).

Is there a way to remove these from the axle of the motor that spins the
disc? I have a cd drive that I'm taking apart...and I want to put a
snap
in
hub on it and remove the one that is currently on it.

I figure they are just press fitted.

Thanks

Nic
Click to expand...
 
"Robotnik" wrote ...
I don't know if this is the correct term for it or not... I'm referring to
the part of a cd drive or cd player that the disc is held in place by
(either by gravity, or snaps).

Is there a way to remove these from the axle of the motor that spins the
disc? I have a cd drive that I'm taking apart...and I want to put a snap
in
hub on it and remove the one that is currently on it.

I figure they are just press fitted.
Click to expand...
Likely (unless you can actually see a set screw)

Common way of removing press-fit gears, etc.
is to heat them (to expand the metal and make
the center hole slightly larger).

Beware of ruining the motor bearings and/or
bending the shaft which likely won't take very
much manhandling.
 
Richard Crowley:
Have you actually done this with plastic hubs? ?..... since the majority of
them are plastic??
It has been my experience that this is usually not a good plan with most
hubs because they are plastic and once they are stretched out from the heat
they will not hold firmly when pressed onto another shaft. Many of the
metal hubs I have encountered have a set screw.--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
-------------------


"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:1001kkochbsne9f@corp.supernews.com...
Common way of removing press-fit gears, etc.
is to heat them (to expand the metal and make
the center hole slightly larger).
Click to expand...
 
How much heat are we talking here... A heat gun? Or maybe just a hair dryer
(Might be a good idea to try and direct the heat to a smaller area if I use
one of these) ? Or if metal parts are exposed, I could use a soldering
iron, I suppose.

On some of the hubs, (the ones where the cd snaps onto it) I took a brief
glance, and noticed that there are three small ciricles (they appear to be
120° apart, and 60° from any of the three snaps) that look like some sort
of set screws or some other type of screw, but they're too small to tell for
sure, I haven't gotten a magnifying glass out for closer look.

Thanks

Nic

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:1001kkochbsne9f@corp.supernews.com...
"Robotnik" wrote ...
I don't know if this is the correct term for it or not... I'm referring
to
the part of a cd drive or cd player that the disc is held in place by
(either by gravity, or snaps).

Is there a way to remove these from the axle of the motor that spins the
disc? I have a cd drive that I'm taking apart...and I want to put a
snap
in
hub on it and remove the one that is currently on it.

I figure they are just press fitted.

Likely (unless you can actually see a set screw)

Common way of removing press-fit gears, etc.
is to heat them (to expand the metal and make
the center hole slightly larger).

Beware of ruining the motor bearings and/or
bending the shaft which likely won't take very
much manhandling.
Click to expand...
 
"Richard Crowley" wrote ...
Common way of removing press-fit gears, etc.
is to heat them (to expand the metal and make
the center hole slightly larger).
Click to expand...
"Sofie" wrote ...
Have you actually done this with plastic hubs? ?.....
since the majority of them are plastic??
Click to expand...
OH HEAVENS NO! I was assuming METAL!

All the ones I have looked at appeared to be metal,
but I didn't examine them closely.

In truth, this seems like a nearly impossible exercise
to accomplish sucessfully. It is easy enough to press
them ON, but no real provision to remove them later.

Metal or plastic, you don't likely have access to enough
(any?) of the shaft end to apply a "gear puller", and if
the hub really is plastic, you'd almost certainly ruin it
in the process of removing. OTOH, since you want to
get rid of it anyway, you might attack/destroy it with a
big pair of wire cutters (dikes).
 
It looks like there might be maybe 2-3 mm of the shaft exposed beneath the
hub... but I don't have any plyers that small, I suppose I could cut some
metal really thin and make a clamp. I'll figure something out. I hope.

Thanks again

Nic

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:10022sufm5m4d8e@corp.supernews.com...
"Richard Crowley" wrote ...
Common way of removing press-fit gears, etc.
is to heat them (to expand the metal and make
the center hole slightly larger).

"Sofie" wrote ...
Have you actually done this with plastic hubs? ?.....
since the majority of them are plastic??

OH HEAVENS NO! I was assuming METAL!

All the ones I have looked at appeared to be metal,
but I didn't examine them closely.

In truth, this seems like a nearly impossible exercise
to accomplish sucessfully. It is easy enough to press
them ON, but no real provision to remove them later.

Metal or plastic, you don't likely have access to enough
(any?) of the shaft end to apply a "gear puller", and if
the hub really is plastic, you'd almost certainly ruin it
in the process of removing. OTOH, since you want to
get rid of it anyway, you might attack/destroy it with a
big pair of wire cutters (dikes).
Click to expand...
 
Well, imagine that. I got them off with just a little bit of prying. No
heat needed. I slid a blank bracket from the back of a PC case under the
hub, on either side of the shaft, and wiggled them arround until it started
to slide off. On the other one, I pried it off with an eyeglass repair kit
screwdriver.

And after all this effort... I find that the shafts are not the same size:

on the parts I want to keep, shaft is bigger than the one it came off of.
So, with some luck, I might be able to make the hole bigger in the hub I
want to keep... and maybe scuff up the shaft a hair, and use some 5-min
epoxy to hold it on. And if this all works, well, that would just be
amazing. :-D
Thanks again for all your help.


Nic

"Robotnik" <chickenmonkey@asdf.com> wrote in message
news:O93Mb.1567$VS4.47266@bgtnsc04-news.ops.worldnet.att.net...
I don't know if this is the correct term for it or not... I'm referring to
the part of a cd drive or cd player that the disc is held in place by
(either by gravity, or snaps).

Is there a way to remove these from the axle of the motor that spins the
disc? I have a cd drive that I'm taking apart...and I want to put a snap
in
hub on it and remove the one that is currently on it.

I figure they are just press fitted.

Thanks

Nic
Click to expand...
 
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