Flanged Chucks

A line of flanged chucks, which are ideal for holding the shanks of gun drills and gun reamers, has been designed and developed by T.M.

A line of flanged chucks, which are ideal for holding the shanks of gun drills and gun reamers, has been designed and developed by T.M. Smith Tool International (Mt. Clemens, MI). The line features chucks with 0.0002-in runout at 4-inches from the holder face, heavy-duty gripping by hand tightening with 90 percent contact with the tool shank, and the ability to handle high-pressure coolant. The chuck design uses tapered inner and outer sleeves with a caged retainer of angled needle roller bearings between, that uniformly constricts the inner sleeve as the hand clamping nut is rotated towards the flange providing very accurate concentricity. Tightening and loosing is easily performed by hand—eliminating the need for any special wrenches. The chucks have from four to six mounting screws in the bolt circle around the flange, depending on the flange diameter. Four tuning screws mounted around the periphery of the flange OD provide for “zeroing-out” of the concentricity. There are 31different chuck sizes available with I.D. clamping ranges from 9.665 mm (.380-in.) to 64.540 mm (2.580-in.). Special designs are available on request as well as chucks with other standard style shanks.