From: Received: from omr-a004e.mx.aol.com ([204.29.186.52] verified) by logan.com (CommuniGate Pro SMTP 6.2c3) with ESMTPS id 9986218 for flyrotary@lancaironline.net; Sat, 05 Aug 2017 21:07:23 -0400 Received-SPF: pass receiver=logan.com; client-ip=204.29.186.52; envelope-from=Lehanover@aol.com Received: from mtaomg-mae02.mx.aol.com (mtaomg-mae02.mx.aol.com [172.26.254.144]) by omr-a004e.mx.aol.com (Outbound Mail Relay) with ESMTP id A493838000A3 for ; Sat, 5 Aug 2017 21:07:06 -0400 (EDT) Received: from core-mdc03g.mail.aol.com (core-mdc03.mail.aol.com [172.27.97.13]) by mtaomg-mae02.mx.aol.com (OMAG/Core Interface) with ESMTP id 4266938000083 for ; Sat, 5 Aug 2017 21:07:06 -0400 (EDT) Full-name: Lehanover Message-ID: <32a229.16024834.46b7c5b9@aol.com> Date: Sat, 5 Aug 2017 21:07:06 -0400 Subject: Re: [FlyRotary] Re: bearing in mazda g/box To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_32a229.16024834.46b7c5b9_boundary" X-Mailer: AOL 9.8 sub 2024 X-Originating-IP: [74.140.83.132] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1501981626; bh=eWwdWxXC8Yrkfu1lC/UyhhZC+bKSwIua3qAt0bsEzhw=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=Syl/cFC7JQHK5nnUf2GwCaSDEPO7BfOwU1GMloTHPCxrD+RKG+ZNr1KshxHCfeQA6 LMHJXUVacxiHTI2CyS+7SA7ld5cR2+yDlBc8TrJJ1a3k6rcrcWnmE5Llbq+maln5KR PagQhuP1/EIVkGcgOZ2Kv1XU+fKk/aivRc5eKr3o= x-aol-sid: 3039ac1afe9059866bba020b --part1_32a229.16024834.46b7c5b9_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit If you need 9,000 RPM it is probably a street gear box. Not a problem. Thestock bearings hold up fine. .......IF. You keep the oil cool. Lite press fits hold the bearings in place in the case. Snap rings on the shafts. Get the case too hot and bearing outer races begin to turn and wear out their holes. Bolt the tail shaft bushing into the housing with a flat head 10/24 screw counter sunk into the bushing. Now that bushing cannot move back and destroy the seal, or begin to rotate. Install an "O" ring ahead of the rear seal. Hold the rear seal in the tailshaft housing with two wire hooks pulled forward by bits of screen door springs. Now the rear seal cannot fall out, and seals even if the tailshaft housing overheats. This works all the way back to RX-2s and RX3s. This also works on fancy racing transmissions. Shield the trans from the exhaust system. Run a pump and oil cooler if allowed. Use a synthetic racing oil in the transmission. Never a problem..............Lynn E. Hanover In a message dated 8/5/2017 6:32:29 P.M. Eastern Daylight Time, flyrotary@lancaironline.net writes: Charlie and Bill, yes tracy used two needle thrust bearings as I have, but in practice there is nothing to hold the thrust washers either side of the two bearings. I just worry about that, but tracy's Box has done thousands of collective hours, so I possibly should throw my worry beads away. Thanks Neil. On 8/6/2017 4:10 AM, Charlie England wrote: Neil, If you're looking for the Mazda transmission input shaft bearing, here's a page from the parts manual. If you need the entire manual, email me at _ceengland7@gmail.com_ (mailto:ceengland7@gmail.com) & I'll send you the pdf. Charlie On 8/5/2017 11:29 AM, Charlie England wrote: I think those are the thrust bearings, to handle the thrust of the helical gears in the planetary gearset. Is that what Neil's asking about? On 8/5/2017 9:51 AM, Bill Schertz wrote: I believe that Tracy's gearbox uses a stack of needle bearings to lower the rpm of each bearing to a better value Bill Schertz -----Original Message----- From: Neil Unger Sent: Friday, August 04, 2017 11:54 PM To: Rotary motors in aircraft Subject: [FlyRotary] bearing in mazda g/box Gents, I have suddenly realised that the main bearing on the Mazda g/box input shaft would have to take 8/9000 RPM. In my search most bearings give out at 6,000 RPM. Does anyone know just what bearing they use? Perhaps the number?? I realise i am the optimist. Thanks Neil. -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --part1_32a229.16024834.46b7c5b9_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
If you need 9,000 RPM it is probably a street gear box. Not a problem= .=20 Thestock bearings hold up fine.
.......IF. You keep the oil cool. Lite press fits hold the bearings= in=20 place in the case. Snap rings on the shafts.
Get the case too hot and bearing outer races begin to turn and wear= out=20 their holes. Bolt the tail shaft bushing into the housing with a flat head= 10/24=20 screw counter sunk into the bushing. Now that bushing cannot move back and= =20 destroy the seal, or begin to rotate.  Install an "O" ring ahead of= the=20 rear seal. Hold the rear seal in the tailshaft housing with two wire hooks= =20 pulled forward by bits of screen door springs.
Now the rear seal cannot fall out, and seals even if the tailshaft ho= using=20 overheats. This works all the way back to RX-2s and RX3s. This also works= on=20 fancy racing transmissions.  Shield the trans from the exhaust system= . Run=20 a pump and oil cooler if allowed. Use a synthetic racing oil in the=20 transmission.
 
Never a problem..............Lynn E. Hanover
 
In a message dated 8/5/2017 6:32:29 P.M. Eastern Daylight Time,=20 flyrotary@lancaironline.net writes:

Charlie and Bill,  yes tracy used two needle thrust bearings as= I=20 have, but in practice there is nothing to hold the thrust washers either= side=20 of  the two bearings.  I just worry about that, but tracy's Bo= x has=20 done thousands of collective hours, so I possibly should throw my worry= beads=20 away.  Thanks Neil.


On 8/6/2017 4:10 AM, Charlie England=20 wrote:
Neil,
If=20 you're looking for the Mazda transmission input shaft bearing, here's= a page=20 from the parts manual. If you need the entire manual, email me at ceengland7@gmail.com & I'= ll send=20 you the pdf.

Charlie

On 8/5/2017 11:29 AM, Charlie Eng= land=20 wrote:
I think those are the thrust bearings, to ha= ndle=20 the thrust of the helical gears in the planetary gearset. Is that wh= at=20 Neil's asking about?

On 8/5/2017 9:51 AM, Bill Schertz wrote= :
I believe that Tracy's gearbox uses a stac= k of=20 needle bearings to lower the rpm of each bearing to a better value= =20
Bill Schertz

-----Original Message----- From: Neil Ung= er=20
Sent: Friday, August 04, 2017 11:54 PM
To: Rotary motors= in=20 aircraft
Subject: [FlyRotary] bearing in mazda g/box=20

Gents,  I have suddenly realised that the main bearin= g on=20 the Mazda
g/box input shaft would have to take 8/9000 RPM.&nbs= p; In=20 my search most
bearings give out at 6,000 RPM.  Does anyo= ne=20 know just what bearing they
use?  Perhaps the=20 number??   I realise i am the optimist. Thanks Neil.=20


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