I sent an email to Shars telling them that the backplate in the 4-jaw chuck & backplate package is not well matched.
The counterbores for the mounting bolts are too large which means that when you turn down the outside diameter to match the chuck, the edges of the counterbores are exposed.
Below is their response:
“David
The OD of the backplate is not designed to be turned down due to the bolt circle pattern. The bolt circle is a set dimension that can not be changed on the chuck and...
What the heck?
The counterbores for the mounting bolts are too large which means that when you turn down the outside diameter to match the chuck, the edges of the counterbores are exposed.
Below is their response:
“David
The OD of the backplate is not designed to be turned down due to the bolt circle pattern. The bolt circle is a set dimension that can not be changed on the chuck and...
What the heck?