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<div dir="ltr" data-setdir="false">Thanks guys, great info!</div><div dir="ltr" data-setdir="false">Yes I normally use the Timken, but it wouldn't surprise me if they changed spec on the radius at some point; I've had the same problem with Sprite/Midget front hub tapered roller bearings.</div><div dir="ltr" data-setdir="false">I'm going to try to get some specs from Moser & I'll order a Green brand bearing & compare to the Timken, & I'll post my findings.</div><div dir="ltr" data-setdir="false">This condition is somewhat concerning obviously because if the inner race & press collar aren't hard up against the hub shoulder, the assembly is weakened as a structure, any hub flex load goes directly into the axle bearing inside corner radius, & we all know what happens after that....</div><div dir="ltr" data-setdir="false">Thanks again!!!</div><div dir="ltr" data-setdir="false">Glen Efinger</div><div><br></div>
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On Monday, January 19, 2026 at 11:32:47 PM EST, DAVE HOGYE via Fot <fot@autox.team.net> wrote:
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<span style="font-family:helvetica;font-size:12pt;">Thanks Joe.</span>
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<span style="font-family:helvetica;font-size:12pt;">I thought that I had crossed this bridge before. </span>
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<span style="font-family:helvetica;font-size:12pt;">I appreciate revisiting these posts.</span>
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<span style="font-family:helvetica;font-size:12pt;">Dave H. </span>
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On 01/19/2026 7:46 PM PST Joe Boruch <jaboruch@yahoo.com> wrote:
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There is a thread from 2020 about the bearings. Here is what I had posted back then;
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"The Moser package that I have, which came with 2 bearings and 2 press on retainers is part number MSR-9507F. The bearing is an RW507E, 1.377 ID and 2.834 OD. JoeB"
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Here are some other posts from that thread:
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The Timken number that I tried using is RW507ER. Perhaps the Suffix R is the radius designation. In any event, it doesn't really cross with the Green bearing used for the Moser axle and I could not get a different Timken bearing. The inner races have a different radius on the i.d. I alway use Timken, but not this time. Southwick will also send you Green bearings. Number RW507E.
<br clear="none" style="outline-color:currentcolor !important;">Dave H.
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<br clear="none" style="outline-color:currentcolor !important;">Sent from my iPad
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<br clear="none" style="outline-color:currentcolor !important;">> On Dec 29, 2020, at 5:10 PM, Phil Gott <<a shape="rect" style="text-decoration-style:solid;text-decoration-color:currentcolor;outline-color:currentcolor !important;" href="mailto:vfracing@aol.com" rel="nofollow" target="_blank">vfracing@aol.com</a>> wrote:
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<br clear="none" style="outline-color:currentcolor !important;">> Thanks, guys!
<br clear="none" style="outline-color:currentcolor !important;">> The seal that failed is not the O-ring. It is the seal in the bearing itself. Gear oil from the differential is slowly working its way into the bearing and diluting the grease, which is getting thrown out onto the brakes.
<br clear="none" style="outline-color:currentcolor !important;">> Much appreciate the responses. I had not heard of “Green” bearings as a brand before. Good to know that the chamfer radii are different from Timken.
<br clear="none" style="outline-color:currentcolor !important;">> In googling the part numbers it looks like Moser actually sells the bearing and retainer as a set available from jEGS, Summit, etc.
<br clear="none" style="outline-color:currentcolor !important;">> Thanks very much, everyone! And for such fast responses. What a great group!
<br clear="none" style="outline-color:currentcolor !important;">> Phil
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<br clear="none" style="outline-color:currentcolor !important;">> Sent from my iPhone
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<br clear="none" style="outline-color:currentcolor !important;">>> On Dec 29, 2020, at 7:54 PM, Dave <<a shape="rect" style="text-decoration-style:solid;text-decoration-color:currentcolor;outline-color:currentcolor !important;" href="mailto:dlhogye@comcast.net" rel="nofollow" target="_blank">dlhogye@comcast.net</a>> wrote:
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<br clear="none" style="outline-color:currentcolor !important;">>> Check the radius of the Timken bearing closely and make sure it will fit, or is larger than the radius on the axle flange before you install it. Moser axles don't come with Timken bearings. They come with Green bearings. The first time I used Timken, I found that the radius of the bearing interferes with the radius of the axle and keeps the bearing from going on as it should. There was about .015" gap.
<br clear="none" style="outline-color:currentcolor !important;">>> The numbers on the Green box are 9507F RW507E. I asked the auto parts guy to get me the Timken cross and when installing it, noticed I could press it on all the way, leaving a gap to the shoulder.
<br clear="none" style="outline-color:currentcolor !important;">>> Dave H.
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On Monday, January 19, 2026 at 10:28:22 PM EST, DAVE HOGYE via Fot <fot@autox.team.net> wrote:
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<span style="font-family:helvetica;font-size:12pt;">Glen,</span>
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<span style="font-family:helvetica;font-size:12pt;">I should have kept the FoT in the thread. Important stuff.</span>
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<span style="font-family:helvetica;font-size:12pt;">I noticed this the first time I changed bearings. If I remember correctly, Timken, which I prefer, had a smaller radius and it didn't seat all the way. It was seating down in the radius of the bearing. Of course I didn't think to check that radius before installing it. Green and Timken obviously have a different radius. I believe Southwick and Moser use the Green bearings. There may be different part numbers from these companies for different dimensions for the radius. I think the basic number is 9507. So, there might be a Timken with the needed radius. The Green number is 9507F or RW507E. </span>
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<span style="font-family:helvetica;font-size:12pt;">Dave H. </span>
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