Seco's New BB732 Boring Bridges: Modular Deep-Boring Solution

BB732 boring bridges One tool, dual purpose for deep hole precision

2025-12-17 Source: Seco Tools 1 min Reading Time

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With the new BB732 boring bridges, Seco introduces a modular deep-boring solution that combines roughing and finishing in a single tool. Designed for Steadyline bars, the system delivers high rigidity, effective vibration damping and targeted coolant flow.

The BB732 boring bridges are designed to work seamlessly with Steadyline bars.(Source: Seco) — The BB732 boring bridges are designed to work seamlessly with Steadyline bars.
(Source: Seco)

Seco announces the launch of the BB732 boring bridges, a modular solution designed for deep boring operations with Steadyline bars. Engineered for both roughing and finishing tasks, BB732 bridges deliver vibration-free performance, optimal coolant flow, and exceptional surface finish all in one tool.

The BB732 boring bridges are tailored for use with the Steadyline SM40 shell mill holder, supporting diameters from 114 mm to 301 mm for roughing and up to 315 mm for finishing. The conical-reinforced shape of the holder ensures high static and dynamic rigidity, up to three times greater than solid holders, while the Steadyline vibration damping system enables stable, high-precision machining even in demanding conditions.

“The BB732 boring bridges are designed to work seamlessly with Steadyline bars, especially the SM40 series, for deep boring jobs with larger diameter bars. One of the standout features is the optimized coolant flow — it’s directed right at the cutting edge to help break up chips and keep the insert cooler,” said Kavita Dandge, Global Product Manager Machine Solutions.

The BB732 bridges eliminate the need for separate tools for roughing and finishing, reducing inventory and setup time. With a built-in safety stopper to prevent block ejection due to centrifugal force, the system also prioritizes operator safety.

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Date: 08.12.2025

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