Face driver

A face driver engageable with an end face of a workpiece, the face driver comprising:

• a body rotatable about an axis;
• a head rotationally fixed on the body and formed with a plurality of guides open axially forwardly toward the workpiece and radially offset from the axis;
• a centering rod axially shiftable in the body on the axis and having a front-end point engageable with the end face of the workpiece;
• a compression spring in the body urging the rod axially forward toward the workpiece;
• a driver disk surrounding the centering rod and having a front face turned axially toward and engageable with the workpiece and a back face turned axially toward the body and formed with a plurality of rearwardly open and radially extending grooves aligned with the guides and each having V-forming bevels;
• respective support pins axially shiftable in the guides and having rounded front-end heads engaged in the bevels of the respective grooves so as to rotationally couple the driver disk rotationally to the body while permitting the driver disk to swivel with axial displacement of the pins;
• a swivelable support disk rearwardly supported on the body and bearing axially forward on rear ends of the support pins;
• and
• complementary part-spherical bearing surfaces on the support disk and body, engaging each other, and centered on the axis for swiveling of the support disk on the body.