Continued:

The "inferior fittings" seem to be the only type available from the local 
hardware store.  An average consumer has no choice.

Sad that.

CalG
----- Original Message ----- 
From: "Dave" <e...@dc9.tzo.com>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Sent: Friday, January 01, 2010 17:28
Subject: Re: [Emc-users] Brass fittings & EMC


> Unfortunately you are right.
>
> I visited a customer of mine early last week and they were putting
> together a manifold for cooling water lines on a machine that had to
> ship before Christmas.  He had ordered some brass fittings - push on
> hose barb to NPT male thread - I believe they were 1/2" x 1/2".     He
> tossed me one and said what do you think..?.  I wasn't sure what he was
> referring to.   Then he tossed me another one.  Both were the same size,
> but one was noticeably heavier than the other.    The lighter one had a
> heavier wall through the fitting but it was quite a bit shorter and the
> color of the brass was a very light color - almost like it was some type
> of Alum alloy.  The other piece was machined out of brass hex bar and
> was full length.  The first one was a Chinese made fitting that they had
> first received.  The second one was from a US maker.  He said they began
> using the US made fittings after they found out that the Chinese made
> fittings would twist off when tightened.  The inferior fittings came
> from a national distributor who I am sure thought that they had gotten a
> very good price on some brass fitting.
>
> I have no idea what alloy they were but obviously they were of inferior
> quality.
>
> Dave
>
> On 1/1/2010 3:21 PM, Matt Shaver wrote:
>> On Fri, 1 Jan 2010 19:19:54 +0200
>> Roland Jollivet<roland.jolli...@gmail.com>  wrote:
>>
>>> You re-coup money in the shavings.
>>>
>> This is the key to what's being said here. Let's say two manufacturers
>> make the same fitting starting with the same size brass blank.
>>
>> 1. They both sell it for the same wholesale price to their clients.
>>
>> 2. Each has identical labor and overhead costs in each part.
>>
>> 3. The manufacturer who scoops out more of the interior of the part and
>> converts it to chips (without increasing the machining time) will
>> realize greater profit because they will recoup more of their stock
>> cost from the sale of the chips.
>>
>> HOWEVER - The customer is being robbed because he is not getting all
>> the material he is paying for! This is possible because there is no
>> acceptance inspection by the receiver, because the dimensions that are
>> undersized are uncontrolled by the part specification.
>>
>> Methods like these are the basis of the Chinese manufacturing
>> economy. Here's a good explanation:
>> http://knowledge.wharton.upenn.edu/article.cfm?articleid=1776
>>
>> Thanks,
>> Matt
>>
>>
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