DRIVE GRIP PINS FOR FACE DRIVER SYSTEMS ON LATHES, LIVE (DEAD) CHUCKS
the face driver product line consists of 7 hydraulic and 10 mechanical designs. this wide range of models offers a large degree of versatility for large parts, such as large rolls, motor shafts and crankshafts; for small parts, such as valve stems, ball studs and automatic transmission shafts; for rough castings and forgings, such as automotive gears.
when using multiple cutting tools, the tool slide feeding toward the headstock should be engaged first. this will firmly embed the drive pins in the workpiece. the distance from the driving face to the headstock will remain identical for all parts within +/-0.002 when constant tailstock force is applied.
other applications, such as hard turning, grinding, gear hobbing and milling, also lend themselves to face driving. for example, gear hob clearance can be an issue for many types of workholding, but with the correctly specified and implemented face driver, this application can be very successful. spring-loaded center pins using a drive disk work well for hobbing. the drive disk can be quickly changed for sharpening or replacement because it is easy to remove.