I have a multi system sharp vcr, and recently it refused to eject the
tape.
I found out the gear at the motor drive shaft that is responisble for
loading and ejecting the tape is crack.
However, i am unable to find replacement gear.

The gear is a bit small, and using the krazy glue still can't make a
tight gear.

Is there anyway to repair the gear? any suggestion?

Thanks!

wrote in message
ps.com...
I have a multi system sharp vcr, and recently it refused to eject the
tape.
I found out the gear at the motor drive shaft that is responisble for
loading and ejecting the tape is crack.
However, i am unable to find replacement gear.

The gear is a bit small, and using the krazy glue still can't make a
tight gear.

Is there anyway to repair the gear? any suggestion?

Thanks!


There is a couple of tips relating to repairing broken plastic gears
somewhere on my 2 tips files on URL below

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

wrote:

I have a multi system sharp vcr, and recently it refused to eject the
tape.
I found out the gear at the motor drive shaft that is responisble for
loading and ejecting the tape is crack.
However, i am unable to find replacement gear.

The gear is a bit small, and using the krazy glue still can't make a
tight gear.

Don't use crazy glue or you'll have to remove it to make a quality
repair. Glue simiply doesn't work well enough on nylon, which is best
repaired by melting it back together with a soldering iron and some
scrap nylon of the same type (another nylon gear, not a nylon wire
tie). As with metal welding, melt the material almost all the way
through. If the center hub of the gear is cracked, melt it back
together and place a metal sleeve (thinwall tubing - brass, steel, or
aluminum from a hobby or hardware store) over it, using epoxy to hold
it if the fit isn't snug.

wrote:
I have a multi system sharp vcr, and recently it refused to eject the
tape.
I found out the gear at the motor drive shaft that is responisble for
loading and ejecting the tape is crack.
However, i am unable to find replacement gear.

The gear is a bit small, and using the krazy glue still can't make a
tight gear.

Is there anyway to repair the gear? any suggestion?

Thanks!


I'll assume this gear is nylon. In 25+ years experience, I have yet to
discover an effective and lasting method for bonding nylon to itself.

Solvents/adhesives supposedly made for the task don't perform well,
either, nor does heat welding. It's very difficult to keep a
cracked/slipping gear together when it's under that kind of
torsion/shearing stress.

That said, there are always alternatives. If this unit is worth the
trouble and expense to ya, you could make a mold of the original and
have a machine shop cut a new one from metal stock, or cast one yourself.
Better still, find for sale a used -- possibly malfunctioning for a
different reason -- vcr of the same model series as yours with a good
gear and cannibalize it.

"Ray L. Volts" wrote in message
news:KEVAh.4231$E71.1361@trnddc04...

I'll assume this gear is nylon. In 25+ years experience, I have yet to
discover an effective and lasting method for bonding nylon to itself.

There is no way. Nylon is molded 100% bone dry and absorbs moisture after
that. Once absorbed, no weld is possible. Unless you can mechanically repair
it you are screwed.



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I've had to make many gears and misc. parts.
Go to your nearest hobby shop and buy some Alumalite plastic. It's a
two part liquid plastic that you mix together and it is completely set
and hard in 3 minutes. They also make a rubber casting compound to copy
the original gear with. I've been using it for years to make gears and
other parts for older copiers and such.



Ray L. Volts wrote:

wrote:

I have a multi system sharp vcr, and recently it refused to eject the
tape.
I found out the gear at the motor drive shaft that is responisble for
loading and ejecting the tape is crack.
However, i am unable to find replacement gear.

The gear is a bit small, and using the krazy glue still can't make a
tight gear.

Is there anyway to repair the gear? any suggestion?

Thanks!

Homer J Simpson wrote:

"Ray L. Volts" wrote in message
news:KEVAh.4231$E71.1361@trnddc04...

I'll assume this gear is nylon. In 25+ years experience, I have yet to
discover an effective and lasting method for bonding nylon to itself.

There is no way. Nylon is molded 100% bone dry and absorbs moisture after
that. Once absorbed, no weld is possible. Unless you can mechanically repair
it you are screwed.

I used to weld nylon gears in hotel TVs all the time when I didn't
have spares, and not one cracked again. I even still have a 30 YO
Sanyo Sears with a small gear that had lost some teeth. The new teeth
I welded on have held up for at least 10 years now, and I was rough on
that tuner, wearing holes all the way through some of its contact
fingers.