 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Bob H
Joined: 01 Dec 2006
Posts: 43
|
 Posted: Mon Apr 08, 2013 6:35 am Post subject: 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
| Quote: | From: Pulsar-List Digest Server <pulsar-list(at)matronics.com>
Reply-To: <pulsar-list(at)matronics.com>
Date: Sun, 7 Apr 2013 23:58:20 -0700
To: Pulsar-List Digest List <pulsar-list-digest(at)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(at)aol.com)
3. 05:05 PM - Nose gear (Dennis Adams)
________________________________ Message 1
_____________________________________
Time: 04:06:44 PM PST US
From: Dennis Adams <ghf4986(at)gmail.com>
Subject: 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(at)aol.com
Subject: Re: 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(at)gmail.com writes:
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(at)gmail.com>
Subject: 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
|
| | - The Matronics Pulsar-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?Pulsar-List |
|
|
|
| Back to top |
|
 |
ghf4986(at)gmail.com
Guest
|
| Posted: Mon Apr 08, 2013 11:45 am Post subject: 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(at)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
| Quote: | From: Pulsar-List Digest Server <pulsar-list(at)matronics.com>
Reply-To: <pulsar-list(at)matronics.com>
Date: Sun, 7 Apr 2013 23:58:20 -0700
To: Pulsar-List Digest List <pulsar-list-digest(at)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(at)aol.com)
3. 05:05 PM - Nose gear (Dennis Adams)
________________________________ Message 1
_____________________________________
Time: 04:06:44 PM PST US
From: Dennis Adams <ghf4986(at)gmail.com>
Subject: 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(at)aol.com
Subject: Re: 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(at)gmail.com writes:
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(at)gmail.com>
Subject: 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
|
| | - The Matronics Pulsar-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?Pulsar-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
