[s-cars] RE: Mandrel Bend Confusion

[Robert Pastore]

Scott:
No Insertion?.....sounds like a Clinton Denial.

This is from Webster's On-line Dictionary:

Main Entry: man.drel
Variant(s): also man.dril  /'man-dr&l/
Function: noun
Etymology: probably modification of French mandrin
Date: 1665
1 a : a usually tapered or cylindrical axle, spindle, or arbor inserted into
a hole in a piece of work to support it during machining b : a metal bar
that serves as a core around which material (as metal) may be cast, molded,
forged, bent, or otherwise shaped



I must note that Ken Starr is not the editor of Webster's, so I'd say
"Insertion is Required".
Anyway, the point of the post was it ain't easy to find a shop that has true
mandrel bending capabilities.

Bob





-----Original Message-----
From: QSHIPQ at aol.com [mailto:QSHIPQ at aol.com]
Sent: Tuesday, January 21, 2003 8:33 AM
To: rpastore at animalfeeds.com; peschulz at cisco.com; S4audinut at aol.com
Cc: wmahoney at disk.com; s-car-list at audifans.com
Subject: Re: [s-cars] RE: Mandrel Bend Confusion


A couple observations Roberto.  First, mandrel doesn't require the insertion
of a device, it can be done by moving the bending tools to accomodate the
metal stretch.  It can also be done by inserting sand into the pipe before
bending.  Another way to make a darn close mandrel bend is to use a regular
bender with 1" larger dies.  This ovals thick walled tubing instead of
crimping it.  I had several 3in systems (including downpipes) built this way
by a race exhaust fabricator here in Chicago.

I've also noticed several vendors of 3in systems (and audis own 2.50
singles)
tend to crimp pipe as it goes over the center crossover brace = not good.
Remember too, that less bends is better, and that any crimp almost negates
the use of bigger pipe alltogether.

HTH

SJ
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