[CAUT] Dipping Parts (was re:magnets etc,now Tokiwa parts)

[Don Mannino]

David,

I believe he is referring to wet-sizing the bushings.  The bushings are
normally wet twice during production, once with hot soapy water to set
the glue, and another time with alcohol and water (this varies a lot
with different companies) to size the bushing to a sizing pin.

In the best scenario, after thorough drying the sizing pin is removed,
the bushing is burnished for final sizing and stabilizing, and the parts
are assembled with the final pin.

The procedures vary tremendously with different manufacturers.

Don Mannino RPt

-----Original Message-----
From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of
David Vanderhoofven
Sent: Friday, April 15, 2005 7:03 AM
To: College and University Technicians
Subject: [CAUT] Dipping Parts (was re:magnets etc,now Tokiwa parts)


Hi Ron,

I am curious, what do you dip parts in, and what is the purpose for
dipping 
action parts?

Sincerely,
David Vanderhoofven


At 03:58 PM 3/31/2005, you wrote:
>The problem can also occur with good bushing cloth. It is important, 
>when
>making the parts, to ensure that sufficient time is allowed after 
>installing the bush for the cloth/flange glue to thoroughly dry before 
>dipping the parts to swell the bush. If the parts are dipped to early,
the 
>glue can migrate through the bushing to the centre pin/bushing contact 
>area. This can allow the glue to deposit on the pin which will
ultimately 
>result in the galling which many of us have experienced.
>
>When we had problems with the aforementioned galling in our earlier
>actions, I raised the issue of allowing time between bushing and
dipping 
>with Tokiwa. I don't know exactly what changes were made to the
production 
>process apart from the use of Renner cloth, but no parts have galled
for 
>us since the 2002 fix.
>
>Ron O.



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