3-jaw lathe power chuck with through-hole
PB series Buck Chuck Company

Buck Forkardt’s superior performance "Pull-Back" chuck for those applications requiring the workpiece to be "pulled back" against the chuck face or optional workstops.
Key Features

* Wedge Style Power Chuck, Made in USA by Buck Forkardt
* Available as 2-Jaw or 3-Jaw version
* Ajust-Tru® precision mounting plus 100% more gripping power than conventional chucks!
* Angular jaws on wider, longer keyways, plus a heavy duty wedge offer the strength and rigidity needed for maximum gripping power from the beginning to the end of jaw travel.
* Larger tapped holes in master jaws to prevent bolt stretch.
* Excellent for single or multiple spindle machines making heavy cuts on precision work.
* The top jaws of the Pull Back chuck incorporate a unique locking cap screw. An internal set screw compresses a locking medium through a side port in the cap screw to prevent rotation and maintain integrity of top jaws through repeated cycles.
* Master jaws recede into chuck face (pull back).