Gibraltar FL11 250-I 10in Plain Back Self-Centering Lathe Chuck Adapter Plate

The Gibraltar FL11 250-I is a new cast iron adapter back plate designed to mount a 10-inch self-centering lathe chuck to a plain-back (L-type) spindle nose, corresponding to the "I" suffix indicating a plain back mount configuration. Cast iron construction provides rigidity, vibration damping, and dimensional stability under interrupted cutting loads; the face and bore are precision-machined to maintain chuck-to-spindle concentricity. The "250" in the part number denotes the 250 mm (approximately 10 in) chuck diameter compatibility, while "FL11" identifies the spindle nose size/series for which the plate is bored and faced. This back plate serves as the intermediate adapter between the lathe spindle and the chuck body, requiring the user to drill and tap mounting holes to match their specific chuck bolt pattern. Suitable for use on engine lathes and manual turning centers accepting the corresponding L-series or equivalent plain back spindle nose, and compatible with Gibraltar and most standard 10-inch 3-jaw and 4-jaw self-centering chucks.

Product Specifications