Tooling TAPER TURNING ATTACHMENT The turning or boring of precision tapers is readily accomplished on the Hardinge Hl Y-H lathe by the use of a taper turning attachment. The Hardinge taper turning attachment is based on the sine bar prindple-swivelling the gUide bar from one end. Graduations for setting guide bar are in i * taper per foot and in degrees. -- The taper turning attachment mounts directly on the back of the lathe bed and is adjustable along the bed to suit the work. AUTOMATIC INDEXING RADIUS TURNING , TURRET The square turret is applied directly to the tool post T-slot of the compound slide.
The turret takes standard ATTACHMENT For precision turning of concave or convex surfaces up to I., " radius. Useful for turning punches. dies, ball shaped valve seats and special spherical cutting tools. n " square tool bits. Bya simple movement of the ball· handled lever, the turret is automatically unlocked, in· dexed to the next tool position and relocked. ready for the next m~chining operation. The swivel slide is mounted on precision pre loaded ball bearings for accuracy and rigidity. The swivel slide moves through 360". Hardened feed screws are mounted on preloaded ball bearings and have adjustable dials graduated in thousandths of an inch.
Accurate indeXing is accomplished through a har~ dened and precision ground tapered index pin. 21