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<div style="margin-bottom: 0in">Hi all- </div><div style="margin-bottom: 0in" dir="ltr" data-setdir="false">This is a follow-up to my
recent post re TR-4/4 southwick axle specs & bearing fitting.</div>
<div style="margin-bottom: 0in">Apparently this was discussed around 5
years ago but I missed it, so I'm posting it again for those unaware
of it.</div><div style="margin-bottom: 0in">The problem is that most of the
replacement bearings don't fit, including the chicom Timkens.</div><div style="margin-bottom: 0in">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.</div><div style="margin-bottom: 0in">This effectively weakens the axle since
all of the stresses remain in the axle inside corner radius, instead
of being distributed into the hub.</div><div style="margin-bottom: 0in">I measured a RW507ER Timken, National &
unknown chicom bearing & all had a small radius.</div><div style="margin-bottom: 0in">The only bearing that actually fits is
the 9507F “small ford” bearing from Moser, unknown manufacturer.</div><div style="margin-bottom: 0in">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.</div><div style="margin-bottom: 0in" dir="ltr" data-setdir="false">BTW this is easily checked w/a feeler
gauge, there should be NO clearance between the inner race & axle
shoulder.</div>
<p style="margin-bottom: 0in">And many THANKS to those who responded
to my post!</p>
<p style="margin-bottom: 0in">Glen Efinger</p>
</div></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Moser on left</div><div dir="ltr" data-setdir="false">representative of the other 3 right</div></div></body></html>