Need Mains .020 OD STD ID .015 Thrust-Help!

Message

Cliff Murray · #1 Post by **Cliff Murray** » Tue Jun 03, 2008 6:55 am

Years ago the aftermarket companies sold odd bearings to repair the #1 thrust fit after the web in the case was machined. Competition Engineering modified this 912 case in the early 80s. They told me today that the bearings have been unavailible for over 15 years. They were very helpfull and there are options to fix the problem if I don't find the correct bearings but it is easier if I can find the oddball bearings. The crankshaft is STD/STD. Please help if you can. Thanks.

Philip R Trenholme · Tue Jun 03, 2008 12:09 pm

I bought a 912 case on eBay that had the flywheel main area machined and a steel ring fitted to fill the machined area. Jay Robison (The Maestro's machinist) told me this was a method to repair the thrust surface IIRC. I have not heard of the special bearings but the method above seems to allow the use of a standard bearing. Possibly this is an inferior solution devised because of the unavailability of the special bearing.

Phil
63B

----- Original Message -----

From: Cliff Murray (cmaxcliff@comcast.net)
To: 356talk@356registry.com (356talk@356registry.com)
Sent: Tuesday, June 03, 2008 3:55 AM
Subject: [356Talk] Need Mains .020 OD STD ID .015 Thrust-Help!

Years ago the aftermarket companies sold odd bearings to repair the #1 thrust fit after the web in the case was machined. Competition Engineering modified this 912 case in the early 80s. They told me today that the bearings have been unavailible for over 15 years. They were very helpfull and there are options to fix the problem if I don't find the correct bearings but it is easier if I can find the oddball bearings. The crankshaft is STD/STD. Please help if you can. Thanks.

Cliff Murray
Chester Springs, Pa
57 Speedster
63 B GT Clone
63 C S90 Coupe(factory test car)
67 911S Coupe

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Guest · #3 Post by **Guest** » Tue Jun 03, 2008 11:42 pm

Cliff,
The first thing you need to do is measure the web thickness of #1
and the bore of all the other bearings to see where you stand.

Alan

Cliff Murray wrote:

Years ago the aftermarket companies sold odd bearings to repair the #1
thrust fit after the web in the case was machined. Competition
Engineering modified this 912 case in the early 80s. They told me
today that the bearings have been unavailible for over 15 years. They
were very helpfull and there are options to fix the problem if I don't
find the correct bearings but it is easier if I can find the oddball
bearings. The crankshaft is STD/STD. Please help if you can. Thanks.

------------------------------------------------------------------------

Cliff Murray
Chester Springs, Pa
57 Speedster
63 B GT Clone
63 C S90 Coupe(factory test car)
67 911S Coupe

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Guest · #4 Post by **Guest** » Wed Jun 04, 2008 12:03 am

That is the good method to bring a case back to life. The use of
special #1 bearings was from the day they were available but not any
more except for NOS stuff.

Alan

Philip R Trenholme wrote:

I bought a 912 case on eBay that had the flywheel main area machined
and a steel ring fitted to fill the machined area. Jay Robison (The
Maestro's machinist) told me this was a method to repair the thrust
surface IIRC. I have not heard of the special bearings but the method
above seems to allow the use of a standard bearing. Possibly this is
an inferior solution devised because of the unavailability of the
special bearing.

Phil
63B

----- Original Message -----
*:*
From: Cliff Murray (cmaxcliff@comcast.net <mailto:cmaxcliff@comcast.net>)
To: 356talk@356registry.com <mailto:356talk@356registry.com>
(356talk@356registry.com <mailto:356talk@356registry.com>)
Sent: Tuesday, June 03, 2008 3:55 AM
Subject: [356Talk] Need Mains .020 OD STD ID .015 Thrust-Help!

Years ago the aftermarket companies sold odd bearings to repair the #1
thrust fit after the web in the case was machined. Competition
Engineering modified this 912 case in the early 80s. They told me
today that the bearings have been unavailible for over 15 years. They
were very helpfull and there are options to fix the problem if I don't
find the correct bearings but it is easier if I can find the oddball
bearings. The crankshaft is STD/STD. Please help if you can. Thanks.

Cliff Murray
Chester Springs, Pa
57 Speedster
63 B GT Clone
63 C S90 Coupe(factory test car)
67 911S Coupe

-------------------- m2f --------------------

To contact an administrator admin@356registry.com
<mailto:admin@356registry.com>
To unsubscribe go to http://www.356registry.com/forum/m2f_usercp.php
Read this topic online here:
http://356registry.com/forum/viewtopic.php?p=7399#7399

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