The MD Series from Effecto Group is a 2-jaw automatic indexing chuck for CNC turning centers. It combines hydraulic workpiece clamping with an integrated indexing mechanism that rotates the gripped part between machining operations — eliminating the need for manual repositioning or a separate rotary axis when features must be machined on multiple faces of the workpiece.

How does indexing work in a turning chuck?

Indexing chucks like the MD Series perform a controlled unclamp-rotate-reclamp cycle within the machine tool's programmed sequence. After the first face is machined, the chuck partially releases clamping pressure, indexes the workpiece to the next angular position (typically 90°, 180°, or 270°), and re-applies full clamping force — all without operator intervention. This preserves the common reference datum established at the first setup, eliminating the cumulative alignment errors that occur when a part is manually removed, rotated, and re-indicated.

About Effecto Group

Effecto Group S.p.A., based in Italy, specializes in workholding and automation components for the machine tool industry. The MD Series is part of their indexing chuck portfolio. Per-size clamping force, through-hole diameter, indexing speed, and dimensional specifications are available from Effecto Group or authorized distributors on request.