Seco’s Steadyline vibration-damping tooling welcomes new spindle interface options for its turning/boring bars. The latest bars, which feature HSK-T/A63, HSK-T/A100 and Seco-Capto C8 machine side connections, bring the line’s high-performance results to even more applications.

The HSK-T/A connection allows the tooling to perform static turning operations on lathes with HSK-T spindles as well as boring operations on machining centres with HSK-A spindles. HSK-T and HSK-A are fully compatible, the difference being that HSK-T features one driving slot with reduced dimensions and tighter tolerances. The HSK-T/A63 is available in 6xD and 8xD lengths, while the HSK-T/A100 is available in 6xD, 8xD and 10xD lengths.

The Seco-Capto C8 connection complements the existing C4, C5 and C6 sizes. It is available in 6xD, 8xD and 10xD lengths.

Steadyline turning/boring bars reduce unwanted vibrations in extreme cutting conditions via a “dynamic passive system” inside the holder body, allowing for high metal removal, less machine tool stress and smooth part surface finishes.  This allows turning and boring operations to achieve long reaches that are not possible with conventional bars, or higher cutting data compared to a conventional bar with the same length. The compact, modular GL connection on these bars provides high centring accuracy and repeatability of the fitted turning tool or boring head, as well as fast tool changes.

Seco has extended the versatility of its Steadyline vibration-damping system with the new EPB® 610 rough boring head and EPB 620 radial type fine boring head.

Featuring the patented GL Connection, these heads are used in combination with Steadyline turning bars. This allows the same Steadyline bar to be used for both static turning and rotating boring operations in deep machining applications of up to 10xD.

Covering diameter ranges from 36 mm to 69 mm, the EPB 610 rough boring heads have a robust design that easily withstands the rigors of heavy, roughing operations in challenging materials. The compact EPB 620 fine boring heads cover diameter ranges 34 mm to 69 mm and features fine-pitch micro-adjusting screws that allow for precise head adjustability. Used in correlation with the Steadyline vibration damping bars, Ra<1 surface finishes are easily obtained, even in 10xD boring operations. These user-friendly boring heads feature hardened stainless steel bodies and through-coolant capabilities that contribute to high-precision machining and long tool life.

The highly precise GL connection also allows users to reduce preparation times via fast, simple mounting and setting procedures. This is made possible by its strong, fast locking capability via a single integrated clamping ring that draws in the tool head for a secure, stable taper-face contact. When it comes to static, turning operations, the connection has a polylobe taper interface with two 180-degree positions that orients the tool’s cutting edge either face up or face down for effective chip control.

Overall, Seco’s Steadyline boring bar system effectively reduces unwanted vibrations in extreme cutting conditions. This is accomplished via a “dynamic passive system” inside the holder body where a heavy metal mass counter acts vibrations created by the holder’s flex during machining operations. Steadyline products can perform typical long overhang operations with higher productivity than traditional tools, reducing spindle stress as well as offering high metal-removal rates, smooth part surface finishes and long tool life.