I have an older woodlathe that I am fixing up and I need some
information. I found both play and noise in the old ball bearings and
ordered new ones. On the left end of the spindle are two nuts that I
thought were to adjust the bearings but was told not so by an older
machinest. He said that the manufacture had built in the amount of
play that the bearing should have and not to try to adjust it for
less. Said that if there was to much play I needed to go to a more
precision bearing. He explained that the two nuts are not the same
thing as the adjusting nuts on a tapered roller bearing spindle. So
what are the two nuts for? The spindle fits tightly enough in the
bearings that it is not going to go eneywhere in use. And what is the
preload adjustment that is on many machine tool spindles?
My understanding of how to install the bearings is as follows.
Press the first bearing on the spindle untill it seats against the
sholder then place the spindle into the headstock and install the step
pully then press the outboard bearing onto the spindle untill it is
seated in the headstock. This last detail is one of the grey areas I
am seeking clarification on.
Thank you for any help you can give.