02-02-2013, 01:09 PM
Andy,
The register is more important than the threads, the important place to measure (with your gauge) is the inside of the taper.
Fix it to your lathe turn the spindle by hand and mark on the out side of the taper the point of maximum needle swing.
Take the ER chuck off the spindle and then screw it back on and measure it again - see if it coincides with the first mark.
If it does then the register is fine but the taper isn't coaxial to the cl [just for Mayhem] of the spindle.
A good place to start.
DaveH
The register is more important than the threads, the important place to measure (with your gauge) is the inside of the taper.
Fix it to your lathe turn the spindle by hand and mark on the out side of the taper the point of maximum needle swing.
Take the ER chuck off the spindle and then screw it back on and measure it again - see if it coincides with the first mark.
If it does then the register is fine but the taper isn't coaxial to the cl [just for Mayhem] of the spindle.
A good place to start.
DaveH