CME 10" L1 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 L1 Long Taper spindles | Plate Diameter: 9 13/16"; Plate Thickness: 1" | Boss Diameter: 8.1102"; Boss Projection: 0.1969" | Mounting Hole Type: Counterbored and Unthreaded (3), Threaded (3); Mounting Hole Thread Size: M12; Mounting holes are positioned on a 8.8976" 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