On Jul 2, 4:13*pm, wrote:
...
Another poster mentioned his t-slots were not aligned with the x-axis.
I would again disassemble and check for burrs and debris. If the
builder used good technique (ha!), the slots should be aligned and
this misalignment could point to other issues (burrs, debris,
incorrectly adjusted gibs, etc.)...
Robin

That was an RF-31 mill-drill from MSC that I bought for an electronics
company shop. It was used for drilling and light milling in flat
aluminum control panels, non-critical jobs that didn't justify taking
time from other projects to clean it up much. I brought in some
precision tools from home to check it and found the slots slightly
askew from the sides of the table and the X axis, and the spindle
tilted ~0.009" over its 5" stroke. The sides of the table indicated
true, so I suspect that the sides/dovetails and the tee slots were
machined in separate operations.

It only matters if you install a key in the bottom of the vise to
position it accurately.