Smart Workholding for Precision 5-Axis Milling

Ideal for production machining, the OML Genius 5-axis vise from Lexair pulls jaws together at the top to clamp down the workpiece with a 9,000 lb force that eliminates issues faced with traditional vise jaws.

The new Genius 5-axis vise from OML SpA (Travacò Siccomario) turns workholding concepts on their head with a unique design that maximizes clamp force at the top of the jaws by pulling them closed at the top with a collapsing lead screw, while holding the bottom of the jaws in place with an opposing force screw.

Available from Lexair Inc. (Lexington, KY), the dual-screw, pull-to-close Genius vise completely eliminates the tendency of traditional vise jaws to splay apart at the top, which requires machine operators to hammer a workpiece down against the stops as the jaws close and clamp force increases.

By holding the vise jaws apart at the bottom and pulling closed at the top, the Genius vise actually pulls the workpiece down against the stops as closing force increases. The Genius vise is available in two sizes, capable of holding parts up to 8 in, with maximum clamp force of 9,000 lb.

An overview and demonstration of the Genius 5-axis vise.

The Genius vise is specifically designed for precision 5-axis milling with trunion-table machines. The adaptable vise easily secures oddly-shaped workpieces, such as turbine blades and blisks, and presents them to the spindle with minimal obstruction, reducing setups and ensuring repeatability of 0.0008 in.

Intended for production machining, the vise is built with precision, hardened and ground steel components. The jaws are guided on two heavy steel shafts, allowing quick, accurate centering on a pallet or machine table. A telescoping stainless steel cover fully encloses the collapsing lead screw to protect it from chips and coolant.

The Genius vise comes standard with one pair of positioning keys, grippers and wrench. A wide variety of stops, jaw plates, gripper inserts and other accessories is available. Custom opening sizes and other variations are available on request.

Lexair Inc., 2025 Mercer Road, Lexington, KY 40511–1018, 859−255−5001, Fax: 859– 255‑6656,


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