Today's Message Index:
----------------------
1. 07:35 AM - Re: Pulsar-List Digest: 3 Msgs - 04/07/13 (Bob Hartunian)
2. 12:45 PM - Re: Re: Pulsar-List Digest: 3 Msgs - 04/07/13 (Dennis Adams)
Message 1
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| Subject: | Re: Pulsar-List Digest: 3 Msgs - 04/07/13 |
Dennis;
4340 has more carbon (30%) than 4130 so weldment has higher chance of
cracking after cooling. You want to keep carbon content in steel for welding
below .30%, hence 4130 is better choice. 4340 is alloyed to provide more
through hardenability in thick sections and does not provide much advantage
in a 3/4" dia rod over 4130. You don't want to weld heat treated 4340 parts;
can get away with welding 4340 if it is just in normalized condition.
The design I built just used normalized 4130 welded to itself and no welding
on the swivel shaft to make problems.
Bob H
> From: Pulsar-List Digest Server <pulsar-list@matronics.com>
> Date: Sun, 7 Apr 2013 23:58:20 -0700
> To: Pulsar-List Digest List <pulsar-list-digest@matronics.com>
> Subject: Pulsar-List Digest: 3 Msgs - 04/07/13
>
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete Pulsar-List Digest can also be found in either of the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the Pulsar-List Digest and can be viewed with a generic text editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2
> 013-04-07&Archive=Pulsar
>
> Text Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter
> 13-04-07&Archive=Pulsar
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> Pulsar-List Digest Archive
> ---
> Total Messages Posted Sun 04/07/13: 3
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 04:06 PM - Nose Gear (Dennis Adams)
> 2. 04:20 PM - Re: Nose Gear (GREGSMI@aol.com)
> 3. 05:05 PM - Nose gear (Dennis Adams)
>
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 04:06:44 PM PST US
> From: Dennis Adams <ghf4986@gmail.com>
> Subject: Pulsar-List: Nose Gear
>
>
> Sent from an IPad
>
> After checking my nose gear, I decided to cut the collar off and
> machine a 4130 by 3/4 steel rod to fit the nose gear down leg at the
> proper angle. Then machined the rod down to 5/8 to go through the
> yoke and threaded the end past the yoke, then welded the rod in place.
>
> I am hoping this will work well. Without the collar the entire pin
> and weld is visible. I also found that the cast aluminum yoke had
> stretched and was developing excessive play. Fortunately I have a
> spare aluminum yoke.
>
> Dennis.
> AD pulsar XP
> N375CM
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 04:20:38 PM PST US
> From: GREGSMI@aol.com
> Subject: Re: Pulsar-List: Nose Gear
>
> Dennis, we found that the 4130 had a hardness of 90ksi while the bolt used
> in the original was rated at 130ksi. Keep a lose eye on it and please keep
> us informed of how things are going.
>
> Greg
>
>
> In a message dated 4/7/2013 6:07:11 P.M. Central Daylight Time,
> ghf4986@gmail.com writes:
>
> --> Pulsar-List message posted by: Dennis Adams <ghf4986@gmail.com>
>
> Sent from an IPad
>
> After checking my nose gear, I decided to cut the collar off and
> machine a 4130 by 3/4 steel rod to fit the nose gear down leg at the
> proper angle. Then machined the rod down to 5/8 to go through the
> yoke and threaded the end past the yoke, then welded the rod in place.
>
> I am hoping this will work well. Without the collar the entire pin
> and weld is visible. I also found that the cast aluminum yoke had
> stretched and was developing excessive play. Fortunately I have a
> spare aluminum yoke.
>
> Dennis.
> AD pulsar XP
> N375CM
>
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 05:05:38 PM PST US
> From: Dennis Adams <ghf4986@gmail.com>
> Subject: Pulsar-List: Nose gear
>
>
> In my previous note I used the wrong steel specification, I meant to
> type 4340 steel. This is what I used for my nose pin.
>
> Dennis
>
> Sent from an IPad
>
>
>
>
>
>
>
>
>
Message 2
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| Subject: | Re: Pulsar-List Digest: 3 Msgs - 04/07/13 |
Bob,
As always, thanks for the information, your the expert. I will keep a
really close eye on the weld.
Dennis
Sent from an IPad
On Apr 8, 2013, at 8:37 AM, Bob Hartunian <bobh5@earthlink.net> wrote:
Dennis;
4340 has more carbon (30%) than 4130 so weldment has higher chance of
cracking after cooling. You want to keep carbon content in steel for welding
below .30%, hence 4130 is better choice. 4340 is alloyed to provide more
through hardenability in thick sections and does not provide much advantage
in a 3/4" dia rod over 4130. You don't want to weld heat treated 4340 parts;
can get away with welding 4340 if it is just in normalized condition.
The design I built just used normalized 4130 welded to itself and no welding
on the swivel shaft to make problems.
Bob H
> From: Pulsar-List Digest Server <pulsar-list@matronics.com>
> Date: Sun, 7 Apr 2013 23:58:20 -0700
> To: Pulsar-List Digest List <pulsar-list-digest@matronics.com>
> Subject: Pulsar-List Digest: 3 Msgs - 04/07/13
>
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete Pulsar-List Digest can also be found in either of the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the Pulsar-List Digest and can be viewed with a generic text editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2
> 013-04-07&Archive=Pulsar
>
> Text Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter
> 13-04-07&Archive=Pulsar
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> Pulsar-List Digest Archive
> ---
> Total Messages Posted Sun 04/07/13: 3
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 04:06 PM - Nose Gear (Dennis Adams)
> 2. 04:20 PM - Re: Nose Gear (GREGSMI@aol.com)
> 3. 05:05 PM - Nose gear (Dennis Adams)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 04:06:44 PM PST US
> From: Dennis Adams <ghf4986@gmail.com>
> Subject: Pulsar-List: Nose Gear
>
>
> Sent from an IPad
>
> After checking my nose gear, I decided to cut the collar off and
> machine a 4130 by 3/4 steel rod to fit the nose gear down leg at the
> proper angle. Then machined the rod down to 5/8 to go through the
> yoke and threaded the end past the yoke, then welded the rod in place.
>
> I am hoping this will work well. Without the collar the entire pin
> and weld is visible. I also found that the cast aluminum yoke had
> stretched and was developing excessive play. Fortunately I have a
> spare aluminum yoke.
>
> Dennis.
> AD pulsar XP
> N375CM
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 04:20:38 PM PST US
> From: GREGSMI@aol.com
> Subject: Re: Pulsar-List: Nose Gear
>
> Dennis, we found that the 4130 had a hardness of 90ksi while the bolt used
> in the original was rated at 130ksi. Keep a lose eye on it and please keep
> us informed of how things are going.
>
> Greg
>
>
> In a message dated 4/7/2013 6:07:11 P.M. Central Daylight Time,
> ghf4986@gmail.com writes:
>
> --> Pulsar-List message posted by: Dennis Adams <ghf4986@gmail.com>
>
> Sent from an IPad
>
> After checking my nose gear, I decided to cut the collar off and
> machine a 4130 by 3/4 steel rod to fit the nose gear down leg at the
> proper angle. Then machined the rod down to 5/8 to go through the
> yoke and threaded the end past the yoke, then welded the rod in place.
>
> I am hoping this will work well. Without the collar the entire pin
> and weld is visible. I also found that the cast aluminum yoke had
> stretched and was developing excessive play. Fortunately I have a
> spare aluminum yoke.
>
> Dennis.
> AD pulsar XP
> N375CM
>
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 05:05:38 PM PST US
> From: Dennis Adams <ghf4986@gmail.com>
> Subject: Pulsar-List: Nose gear
>
>
> In my previous note I used the wrong steel specification, I meant to
> type 4340 steel. This is what I used for my nose pin.
>
> Dennis
>
> Sent from an IPad
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