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--></style></head><body lang=EN-US link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=DE style='font-size:11.0pt'>As a work around.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Put the race on a lathe and grind out radius to fit.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Cheers<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Chris<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=DE style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=DE style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Fot <fot-bounces@autox.team.net> <b>On Behalf Of </b>fubog1 via Fot<br><b>Sent:</b> Tuesday, January 27, 2026 10:32 PM<br><b>To:</b> FOT Triumph <fot@autox.team.net><br><b>Subject:</b> [Fot] TR 3/4 Southwick axle/bearing follow-up<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>Hi all- <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>This is a follow-up to my recent post re TR-4/4 southwick axle specs & bearing fitting.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>Apparently this was discussed around 5 years ago but I missed it, so I'm posting it again for those unaware of it.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>The problem is that most of the replacement bearings don't fit, including the chicom Timkens.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>The corner radius of the inner race is much smaller than the axle journal radius, where the inner race butts up against the axle shoulder, preventing the bearing race from pressing fully home.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>This effectively weakens the axle since all of the stresses remain in the axle inside corner radius, instead of being distributed into the hub.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>I measured a RW507ER Timken, National & unknown chicom bearing & all had a small radius.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>The only bearing that actually fits is the 9507F “small ford” bearing from Moser, unknown manufacturer.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>The photo below clearly shows that the Moser bearing inner race is relieved/clearanced out in the last ¼ inch or so before the radius, so the bearing presses fully home as intended.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>BTW this is easily checked w/a feeler gauge, there should be NO clearance between the inner race & axle shoulder.<o:p></o:p></span></p></div><p style='margin-bottom:0cm'><span style='font-family:"Arial",sans-serif'>And many THANKS to those who responded to my post!<o:p></o:p></span></p><p style='margin-bottom:0cm'><span style='font-family:"Arial",sans-serif'>Glen Efinger<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>Moser on left<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>representative of the other 3 right<o:p></o:p></span></p></div></div></div></body></html>