Re: Tramming the mill

On Jun 30, 5:00 pm, Gunner Asch <gun...@xxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 30 Jun 2008 15:45:26 -0400, Ned Simmons <n...@xxxxxxxxxx>
On Mon, 30 Jun 2008 13:17:41 -0500, RB <burkhei...@xxxxxxxxx> wrote:
Terry Coombs wrote:
I'd suggest you use a collet to hold the DI rod.
drill chucks can impart error

Not if he's sweeping the table with the indicator. The indicator point
will follow the spindle's center of rotation regardless of how bad the
runout of the rod is.
assuming the chuck as no pitch and yawl......
gunner

I have to agree with Ned. If the chuck is crooked the bottom end of
the rod will rotate in a circle but that circle will be centered on
and perpendicular to the spindle rotation. Try it with a piece of bent
gas welding rod (my favorite steel wire / rod up to 1/4").

BTW, if you don't have a good dial indicator you can tram the mill
square with just a bent rod and feeler gauges. It's easier if you
check height to the top of a parallel so the rod won't catch in a
table slot.
.

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