Multifunction toolholder cuts inventory

Manufacturing Engineering, Jul 1998

Operators can use Chamturn insert holders from Iscar Metals, Inc. (Arlington, TX) in a variety of longitudinal facing and profiling applications. They are based on a single pocket in which various insert shapes can be mounted. The pocket geometry has three contact points for clamping of 7deg clearance square, round, rhombic, and Q-type positive inserts. A central screw provides the necessary clamping force to push the various inserts against the contact points as well as downward to ensure strong, precise clamping. Inserts have star-shaped bases to enable positioning of all four types.

All four insert types have new SM chipformers for chip control in the range of 0.07-0.30 mm/rev. Recommended depth of cut is 0.5-3.0 mm. Inserts come with a variety of coatings. Iscar recommends the MT CVD version for machining cast iron and alloy steel at speeds to 400 m/min and also semiroughing and roughing with cutting speeds of 350 m/min and 300 m/min when machining stainless. The company recommends inserts with a PVD coating for interrupted cuts and heavy-duty operations on steel.

External toolholders designated SUXCR and SUXCL are available in 16, 20, and 25-mm square shank sizes. The S-SUXCR/L boring bars are available in round shanks with 16, 20, and 25 mm diameters. For more information, Circle 330.