Sherline 3420- Adjustable Zero Handwheels
Photo shows 3440 2.5″ handwheel. 2″ handwheel looks similar.
Most expensive full-size machine tools allow the machinist to reset the handwheel to “zero” (or any desired setting) at any time during the machining operation. That option is available on Sherline’s miniature machine tools as well. These handwheels install easily in place of the standard handwheels by simply releasing one set screw. Operation is simple as well. Just release the black locking nut while holding the handwheel. Then reset the red 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 1-5/8″ handwheels can be replaced with 2″ adjustable handwheels. Both inch and metric versions are available. 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. If you’re not sure, call with the model number of your machine and we will help you select the proper handwheel upgrade.
[su_button url=”http://www.vcshobbies.com/blog/sherline-accessories/” background=”#f7921c” center=”yes” class=”vcshobbies-button”]Click Here For Instructions[/su_button]