The runout is the same on the inside taper, over .002.
So much for buying old American iron.
Paul


"DoN. Nichols" wrote in message
...
In article ,
Paul Weber wrote:
I got at auction a Clausing 5900 12x24. In setting up a chuck I found
.0025 radial runout on the nose taper. The spec is less than .0005. Is
there any kind of bearing problem that will cause this? The runout is at
the same position every rev. The bearings appear to be as tight as they
will go. Thanks Paul

Is it the same on the inside taper?

I suspect that what happened is that someone managed to spin a
bearing at the nose end of the spindle, and did a knurling job to expand
what was left to grip the replacement bearing -- and did the job
somewhat unevenly. I've found light knurling on my L-00 spindle when I
swapped it in to replace a 2-1/4x8 spindle (mine was a model 5418, and I
wanted the better spindle nose. But mine came out pretty good, in spite
of the knurling.

Good Luck,
DoN.

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