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rparigor(at)SUFFOLK.LIB.N
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 Posted: Mon Aug 14, 2006 11:32 am Post subject: Magnetic hardware? (was magnetic screwdrivers) |
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There were 2 replies to the magnetic screwdriver thread, one said when
going to A+P school hardware was placed in a bowl that had a magnetic in
the bottom and slight magnetized the hardware and it needed to be
discarded, and there was another reply about having to discard hardware
that becomes magnetic on turbine aircraft.
Where can you not use magnetic hardware safely on a piston, and a turbine
aircraft and why?
I read something from Lycoming when a friend was rebuilding a O-540 about
checking the hydraulic valve lifters with a thin piece of string and a
paperclip and to discard if there was more than some sort of deflection.
Initial I thought it was because it may attract metal particles and fail
the check valve, but it may be that the magnetism may hinder operation of
check valve?
I have a 914 Rotax on a Europa. Has a magnetic plug to catch debris.
Ron Parigoris
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Hopperdhh(at)aol.com
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| Posted: Mon Aug 14, 2006 12:23 pm Post subject: Magnetic hardware? (was magnetic screwdrivers) |
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Anything that can be magnetized can be de-magnetized. I have a magnetic tape eraser from the very early computer days that I use to demagnetize (degauss) tools, and it would work on a lifter too, I'm sure.
You press the button which turns on the AC, and wave the item to be degaussed around in its alternating magnetic field while slowly drawing it away. When it is about 2 feet or more away you can then shut off the AC current, and you're done.
This is something that I made from an old transformer. If you want details, I can give 'em.
Dan Hopper
RV-7A
In a message dated 8/14/2006 3:36:49 P.M. Eastern Daylight Time, rparigor(at)SUFFOLK.LIB.NY.US writes:
| Quote: | --> AeroElectric-List message posted by: <rparigor(at)suffolk.lib.ny.us>
There were 2 replies to the magnetic screwdriver thread, one said when
going to A+P school hardware was placed in a bowl that had a magnetic in
the bottom and slight magnetized the hardware and it needed to be
discarded, and there was another reply about having to discard hardware
that becomes magnetic on turbine aircraft.
Where can you not use magnetic hardware safely on a piston, and a turbine
aircraft and why?
I read something from Lycoming when a friend was rebuilding a O-540 about
checking the hydraulic valve lifters with a thin piece of string and a
paperclip and to discard if there was more than some sort of deflection.
Initial I thought it was because it may attract metal particles and fail
the check valve, but it may be that the magnetism may hinder operation of
check valve?
I have a 914 Rotax on a Europa. Has a magnetic plug to catch debris.
Ron =========================p; = Use lities Day ========================= - NEW MATRONICS WEB FORUMS -
bsp; --> =========================nbsp; - NEW MATRONICS LIST WIKI -
_-= ; =========================p; - List Contribution Web Site ; ==================================================
|
[quote][b]
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Mon Aug 14, 2006 1:19 pm Post subject: Magnetic hardware? (was magnetic screwdrivers) |
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The instructor said there was no place for the Snap-On magnetic trays in
aviation repair except diesels and auto repair shops. The theory had to
do with dynamic balance on a turbine shaft spinning in the 20,000 plus
revs and its critical balance between moving parts. It effects bearings
and balanced components on reciprocating devices as well.
John Cox
Do not Archive
--
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Mon Aug 14, 2006 1:21 pm Post subject: Magnetic hardware? (was magnetic screwdrivers) |
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Without a cheap handheld degauss meter you are only half the way to confirming a component is degaussed. A poor man’s device is a simple Boy Scout compass, just FYI.
John
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Hopperdhh(at)aol.com
Sent: Monday, August 14, 2006 1:22 PM
To: aeroelectric-list(at)matronics.com
Subject: Re: AeroElectric-List: Magnetic hardware? (was magnetic screwdrivers)
Anything that can be magnetized can be de-magnetized. I have a magnetic tape eraser from the very early computer days that I use to demagnetize (degauss) tools, and it would work on a lifter too, I'm sure.
You press the button which turns on the AC, and wave the item to be degaussed around in its alternating magnetic field while slowly drawing it away. When it is about 2 feet or more away you can then shut off the AC current, and you're done.
This is something that I made from an old transformer. If you want details, I can give 'em.
Dan Hopper
RV-7A
In a message dated 8/14/2006 3:36:49 P.M. Eastern Daylight Time, rparigor(at)SUFFOLK.LIB.NY.US writes:
| Quote: |
--> AeroElectric-List message posted by: <rparigor(at)suffolk.lib.ny.us>
There were 2 replies to the magnetic screwdriver thread, one said when
going to A+P school hardware was placed in a bowl that had a magnetic in
the bottom and slight magnetized the hardware and it needed to be
discarded, and there was another reply about having to discard hardware
that becomes magnetic on turbine aircraft.
Where can you not use magnetic hardware safely on a piston, and a turbine
aircraft and why?
I read something from Lycoming when a friend was rebuilding a O-540 about
checking the hydraulic valve lifters with a thin piece of string and a
paperclip and to discard if there was more than some sort of deflection.
Initial I thought it was because it may attract metal particles and fail
the check valve, but it may be that the magnetism may hinder operation of
check valve?
I have a 914 Rotax on a Europa. Has a magnetic plug to catch debris.
Ron =========================p; = Use lities Day ========================= - NEW MATRONICS WEB FORUMS -
bsp; --> =========================nbsp; - NEW MATRONICS LIST WIKI -
=========================p; - List Contribution Web Site ; ==================================================
|
[quote] [b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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