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Hi all,

I recently had a need to break out my Sun Archive QIC-150 tape drive
(Sun P/N 370-1218-04) to read some old archives, and had the misfortune
of discovering that the pinch roller has turned to a sticky black goo!
Anyone else ever had this problem? Ive been reading up on this
phenomenon and apparently its not so uncommon on older equipment. Is
there anyone out there who still has a working one or these? If so and
you own a pair over vernier calipers and know how to use them, could you
be so kind and measure the outside diameter of the rubber pinch roller?
I found a guy on line who rebuilds these rollers with a superior rubber
compound and would like to send him the original OD specs.
Thanks in advance!!
Kurt

p.s.: to reply directly please remove the fruit from my reply email address.

According to Kurt Nowak <[email protected]>:
> Hi all,
>
> I recently had a need to break out my Sun Archive QIC-150 tape drive
> (Sun P/N 370-1218-04) to read some old archives, and had the misfortune
> of discovering that the pinch roller has turned to a sticky black goo!
> Anyone else ever had this problem? Ive been reading up on this
> phenomenon and apparently its not so uncommon on older equipment. Is
> there anyone out there who still has a working one or these? If so and
> you own a pair over vernier calipers and know how to use them, could you
> be so kind and measure the outside diameter of the rubber pinch roller?
> I found a guy on line who rebuilds these rollers with a superior rubber
> compound and would like to send him the original OD specs.
> Thanks in advance!!
> Kurt

O.K. You don't mention the preferred units, so I'll give both
sets likely to be useful:

0.046"
12.35mm

Of course, a truly precision measurement is difficult with it
mounted in the drive, as it is difficult to get the calipers in without
having an angle -- and the rubber roller compresses slightly too. But
these figures should be close enough. If real precision were needed, I
would have to disassemble it and to use a micrometer with good feel in
the measurement. But -- there is a button-head Allen screw on the back
of the swinging base to allow adjustment for proper pressure against the
roller in the cartridge, so I think that what I have given you should be
sufficient.

FWIW There is one of these drives on eBay -- auction #160167282627,
but it is opening at $99.99 (with 5 days 1 hour left) so it
all depends on how much the rebuild of the roller may cost.

> p.s.: to reply directly please remove the fruit from my reply email address.

I prefer to reply in the newsgroup where the question was asked,
so others can comment if I have made a mistake.

Good Luck,
DoN.

--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

Thanks for your time Don! BTW, you are off by a factor of 10 Im sure
you meant .460". Someone else sent me another measurement, albeit much
more crude yours at .5". He used an adjustable wrench and then measured
its gap with a scale. Creative, but gives me a good ballpark. I'm a
mechanical engineer, so I can get a bit anal about measurement. Although
I think .500 +/- .040 should be acceptable In case anyone is
wondering, the guy I'm going to send this too is at:
http://www.terrysrubberrollers.com/
Apparently he wants $35 to apply the rubber roller to my existing
pulley/roller. So far I haven't found a used one anywhere this cheap.
Plus, all the ones out there are going to be pretty old too, and
probably will suffer from the same symptom eventually. I think Id rather
have a custom one made that will last for some years.

Kurt


DoN. Nichols wrote:
> According to Kurt Nowak <[email protected]>:
>> Hi all,
>>
>> I recently had a need to break out my Sun Archive QIC-150 tape drive
>> (Sun P/N 370-1218-04) to read some old archives, and had the misfortune
>> of discovering that the pinch roller has turned to a sticky black goo!
>> Anyone else ever had this problem? Ive been reading up on this
>> phenomenon and apparently its not so uncommon on older equipment. Is
>> there anyone out there who still has a working one or these? If so and
>> you own a pair over vernier calipers and know how to use them, could you
>> be so kind and measure the outside diameter of the rubber pinch roller?
>> I found a guy on line who rebuilds these rollers with a superior rubber
>> compound and would like to send him the original OD specs.
>> Thanks in advance!!
>> Kurt
>
> O.K. You don't mention the preferred units, so I'll give both
> sets likely to be useful:
>
> 0.046"
> 12.35mm
>
> Of course, a truly precision measurement is difficult with it
> mounted in the drive, as it is difficult to get the calipers in without
> having an angle -- and the rubber roller compresses slightly too. But
> these figures should be close enough. If real precision were needed, I
> would have to disassemble it and to use a micrometer with good feel in
> the measurement. But -- there is a button-head Allen screw on the back
> of the swinging base to allow adjustment for proper pressure against the
> roller in the cartridge, so I think that what I have given you should be
> sufficient.
>
> FWIW There is one of these drives on eBay -- auction #160167282627,
> but it is opening at $99.99 (with 5 days 1 hour left) so it
> all depends on how much the rebuild of the roller may cost.
>
>> p.s.: to reply directly please remove the fruit from my reply email address.
>
> I prefer to reply in the newsgroup where the question was asked,
> so others can comment if I have made a mistake.
>
> Good Luck,
> DoN.
>

According to Kurt Nowak <[email protected]>:
> Thanks for your time Don! BTW, you