Walter Adds to Line of Copy Turning Systems

Walter has introduced the W1211/W1210 copy turning system for boring bars, imparting a higher level of dimensional stability and indexing accuracy to internal machining, including profiling, facing and axial grooving. The company claims these boring bars and indexable inserts with Walter Lock positive engagement combat the high forces in variable directions that occur with internal profiling applications with V-style inserts.

The oblong shape of a conventional V-style insert leads to a long pocket in the boring bar. Because of this, cutting forces are encountered far away from the actual support that the insert pocket provides, which the company says can cause increased pitting of the pocket, wear and a lack of indexing accuracy with indexable, diamond-shaped inserts. With the positive-locking insert seat design and three-point support, the company says that W1211/W1210 boring bars and WL25 inserts achieve stability that enables the tools to be used in both directions of travel, increasing both indexing accuracy as well as tool life.

Walter offers two versions of these boring bars with diameters of 0.984, 1.260, and 1.575-in. (25, 32 and 40 mm): W1210 for profiling angles of up to 72.5° with a symmetric design and W1211 for profiling angles of up to 50° for a more robust support. The positive WL25 indexable inserts with three cutting edges are available in four insert types, depending on the requirements of the application: neutral, left-hand, right-hand and full-radius versions. All insert types fit into the same tool. In addition to the wear-resistant Walter Tiger-tec silver grades that are currently used, Tiger-tec gold inserts are also now available. The company says the dual rake-face cooling and optional axial cooling, for flushing out the chips during blind-hole machining, also result in longer tool life, and therefore greater cost-efficiency.