Subject: [TR] Crank shaft bearings,1965 TR4A

From: [email-masked]
Date: Thu, 3 Oct 2019 11:24:22 -0400 (EDT)

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Good day all. Any experience or recommendations for best bearings to use on an old, maybe not so concentric, crankshaft. Mechanic/ friend has schooled me that a perfect, recently machined crankshaft can tolerate hard bearings that will last a long time without any need to conform to crankshaft irregularities. An old out of round crank needs bearing material that is somewhat malleable and can embed into the irregularities but is so soft they usually don't last as long. The old Clevite 77 bearings had both advantages of embeddability and a durable alloy. However, it seems that those NOS bearings are now unavailable I think I read that the King Bearings are the closest to them. Thanks, Arnold 

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<html><body><div style=3D"font-family: arial, helvetica, sans-serif; font-s=
ize: 12pt; color: #000000"><div>Good day all.&nbsp; Any experience or&nbsp;=
 recommendations for best bearings to use on an old, maybe not so concentri=
c, crankshaft.&nbsp;&nbsp; Mechanic/ friend has schooled me that a perfect,=
 recently machined crankshaft can tolerate hard bearings that will last a l=
ong time without any need to conform to crankshaft irregularities.&nbsp;&nb=
sp; An old out of round crank needs bearing material that is somewhat malle=
able and can embed into the irregularities but is so soft they usually don'=
t last as long. &nbsp; The old Clevite 77 bearings had both advantages of<s=
pan class=3D"st"><em> embeddability</em></span> and a durable alloy.&nbsp; =
However, it seems that those NOS bearings are now unavailable&nbsp; I think=
 I read that the King Bearings are the closest to them.&nbsp; Thanks, Arnol=
d&nbsp; <br></div></div></body></html>
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** [email-masked] **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive

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From: "Joel E. Justin" <[email-masked]>
Date: Thu, 3 Oct 2019 18:51:12 +0000

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Why would you want to rebuild an engine with an old, out-of-round crankshaf=
t? The machine shop work to get it polished/ground and the block line-bored=
 doesn't cost much and gives you good piece of mind that your rebuilt engin=
e will last.

Specifically on bearings, I've used the King tri-metal bearings on all my r=
ebuilds and have been happy with them. But they were all used on polished (=
and balanced) cranks and line-bored blocks.

Joel...

________________________________
From: [email-masked] <[email-masked]>
Sent: Thursday, October 3, 2019 8:24 AM
To: [email-masked] <[email-masked]>
Subject: [TR] Crank shaft bearings,1965 TR4A

Good day all.  Any experience or  recommendations for best bearings to use =
on an old, maybe not so concentric, crankshaft.   Mechanic/ friend has scho=
oled me that a perfect, recently machined crankshaft can tolerate hard bear=
ings that will last a long time without any need to conform to crankshaft i=
rregularities.   An old out of round crank needs bearing material that is s=
omewhat malleable and can embed into the irregularities but is so soft they=
 usually don't last as long.   The old Clevite 77 bearings had both advanta=
ges of embeddability and a durable alloy.  However, it seems that those NOS=
 bearings are now unavailable  I think I read that the King Bearings are th=
e closest to them.  Thanks, Arnold

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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 14pt;=
 color: rgb(0, 0, 0);">
Why would you want to rebuild an engine with an old, out-of-round crankshaf=
t? The machine shop work to get it polished/ground and the block line-bored=
 doesn't cost much and gives you good piece of mind that your rebuilt engin=
e will last.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 14pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 14pt;=
 color: rgb(0, 0, 0);">
Specifically on bearings, I've used the King tri-metal bearings on all my r=
ebuilds and have been happy with them. But they were all used on polished (=
and balanced) cranks and line-bored blocks.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 14pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 14pt;=
 color: rgb(0, 0, 0);">
Joel...</div>
<div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family:Calibri,Helvetica,sans-serif; font-size:14pt; col=
or:rgb(0,0,0)">
<br>
</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> [email-masked]=
t &lt;[email-masked]&gt;<br>
<b>Sent:</b> Thursday, October 3, 2019 8:24 AM<br>
<b>To:</b> [email-masked] &lt;[email-masked]&gt;<br>
<b>Subject:</b> [TR] Crank shaft bearings,1965 TR4A</font>
<div>&nbsp;</div>
</div>
<div>
<div style=3D"font-family:arial,helvetica,sans-serif; font-size:12pt; color=
:#000000">
<div>Good day all.&nbsp; Any experience or&nbsp; recommendations for best b=
earings to use on an old, maybe not so concentric, crankshaft.&nbsp;&nbsp; =
Mechanic/ friend has schooled me that a perfect, recently machined cranksha=
ft can tolerate hard bearings that will last a long
 time without any need to conform to crankshaft irregularities.&nbsp;&nbsp;=
 An old out of round crank needs bearing material that is somewhat malleabl=
e and can embed into the irregularities but is so soft they usually don't l=
ast as long. &nbsp; The old Clevite 77 bearings
 had both advantages of<span class=3D"x_st"><em> embeddability</em></span> =
and a durable alloy.&nbsp; However, it seems that those NOS bearings are no=
w unavailable&nbsp; I think I read that the King Bearings are the closest t=
o them.&nbsp; Thanks, Arnold&nbsp;
<br>
</div>
</div>
</div>
</div>
</body>
</html>

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