CME 8" L0 Long Taper Lathe Chuck Backing Plate, Fits Self-Centering (Scroll) Chucks

Lathe chuck adapter; Fits to plain (flat) back lathe chucks to mount on lathes with L0 Long Taper spindles Plate Diameter: 7 7/8"; Plate Thickness: 1" Boss Diameter: 6.4961"; Boss Projection: 6.4961" Mounting Hole Type: Counterbored and Unthreaded (3), Threaded (3); Mounting Hole Thread Size: M10; Mounting holes are positioned on a 7.0866" diameter circle For intended fitment, boss dimensions and mounting hole placement of the back plate should match the registration dimensions and mounting hole placement of the lathe chuck; Front mount lathe chucks require threaded holes while rear mount lathe chucks require unthreaded and counterbored holes on the back plate