Most expensive full-sized machine tools allow the machinist to reset the handwheel to "zero" (or any desired setting) at any time during the machining operation.
Now that option is available on Sherline's miniature machine tools as well. They install easily in place of the standard handwheels by simply releasing one set screw.
Operation is simple as well. Just release the locking nut while holding the handwheel. Then reset the handwheel collar to "zero" and retighten the locking nut. Now you can dial in the amount of feed you want starting from zero without having to calculate your stopping point. It's a great timesaver and also reduces the chance of errors.
All standard handwheels can be replaced with 2" adjustable handwheels. For the Z-axis of the mill or vertical milling column, a 2-1/2" diameter handwheel is available. Newer machines come with a ball thrust bearing set to relieve the stress caused by the lifting action of the vertical Z-axis that is not present on the other horizontal axes. Older machines can be upgraded to use the new ball bearing set when getting the resettable handwheel.
CA Prop 65 WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance know to the State of California to cause cancer. Avoid inhaling wood dust or use dust mask or other safeguards for personal protection.
I can do all this through him who gives me strength. Philippians 4:13