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Shars 6 Inch 3 Jaw Self Centering Lathe Chuck + 6.3 Semi-Machined Threaded Back Plate with 2-1/4 x 8 TPI, Machining Required L
Back plate needs to be machined in order to fit the lathe chuck You would not need to drill any mounting holes but you will need to turn the shoulder down.050 to match the back of the lathe chuck to make the chuck & back plate more concentric with the lathe spindle. When turning the shoulder of the backing plate, ONLY TURN THE SHOULDER OF THE BACKING PLATE WHEN ATTACHED TO THE LATHE SPINDLE. If you use a chuck to clamp the backing plate and then turn it, the backing plate will not be true

Price is $186.00
Price: $185.95