Pete.
Member
- Messages
- 14,137
- Location
- Kent, UK
No it would still be mis-aligned. If you were hell-bent on using power to ream the taper you would first perform several tests to make sure the quill is exactly aligned with the spindle centre line.
Check the bed for twist with a sensitive level.
Check the headstock alignment by turning a short and wide part in the chuck and checking the diameter both ends.
This will ensure the spindle is co-axial to the bed ways.
Perform a two-collar test to check the tailstock is now co-axial to the spindle. This involves turning a piece in the chuck to the exact diameter of the quill, then bringing the quill up to that part and using a dial gauge across the join to make sure they read the same. Do it on the side and adjust the off-set screws so they line up then check it on the top.
After that you can safely chuck the reamer in the 4-jaw, dial it in and use it to cut the taper - very slowly with plenty of oil.
Check the bed for twist with a sensitive level.
Check the headstock alignment by turning a short and wide part in the chuck and checking the diameter both ends.
This will ensure the spindle is co-axial to the bed ways.
Perform a two-collar test to check the tailstock is now co-axial to the spindle. This involves turning a piece in the chuck to the exact diameter of the quill, then bringing the quill up to that part and using a dial gauge across the join to make sure they read the same. Do it on the side and adjust the off-set screws so they line up then check it on the top.
After that you can safely chuck the reamer in the 4-jaw, dial it in and use it to cut the taper - very slowly with plenty of oil.