UNISIG was founded in 1981 to provide deep hole drilling machines, accessories and services to the US market.  Early in its history, UNISIG established a reputation for strong deep hole drilling application support for customers in many different industries.

In 1995, UNISIG was acquired by Entrust Manufacturing Technologies, Inc. and relocated to their headquarters near Milwaukee, Wisconsin. Entrust invested heavily in the further development of UNISIG deep hole drilling machines and related products.  Everything was questioned and conventional limitations were challenged with a fresh perspective.  Strong engineering and manufacturing capabilities pushed the limits of what was possible in the industry.

This has resulted in a modern, comprehensive product line, focused on technology, performance and high standards of reliability demanded of precision machine tools.  UNISIG products are supported around the world, with installations in the Americas, Europe and Asia.

Through the combined history of Entrust and UNISIG, there is a common trend of steady growth, investment and innovation.  This has allowed us to build a strong organization able to support our customers with their most challenging projects.

Our History Timeline


John Korosec Entrust Founder

Entrust is founded as Entrust Tool and Design Co., Inc. by John Korosec in Menomonee Falls, Wisconsin.

Entrust produced specialized machines and provided contract manufacturing services


history of UNISIG

UNISIG is founded in Elgin, Illinois by Swiss Industrial Company (Schweizerische Industrie Gesellschaft “SIG”) and the US company United Technical to provide deep hole drilling equipment and technology to the US market


UNISIG history facility

First Entrust facility expansion increases assembly and machine shop capacity.


history of UNISIG

Entrust begins systems integration of CNC machinery and automation


UNISIG facility

Second major facility expansion required for large integrated system assembly.


Anthony Fettig UNISIG CEO

Current CEO Anthony Fettig joins Entrust’s engineering department.


UNISIG detail

Entrust acquires UNISIG brand as a product division of Entrust. UNISIG begins to redefine performance expectations in the deep hole drilling market.


Tanya Palmer Entrust President

Current president Tanya Palmer joins Entrust as Controller.


deep hole drilling global

Current UNISIG management team put in place. A growth strategy is formed to include substantial international business as well as increasing sales in North American markets.

Growth continues through Asian and European sales.


gundrilling machine for sale

UNISIG Express delivery program established to radically reduce lead time on high performance BTA machines and durable tooling


UNISIG manufacturing technology

Commitment by shareholders for significant investment in UNISIG as a global leader in deep hole drilling technology.


UNISIG manufacturing facility

UNISIG facility expansion includes 50 ton cranes and a 12 meter [42 ft] high bay assembly.


UNISIG GmbH Announcement

German subsidiary UNISIG GmbH is founded to service European markets.

Entrust changes name to Entrust Manufacturing Technologies, Inc. to identify product development and investment direction.


automation for rifle machine

UNISIG tech center created for advanced deep hole drilling prototype services


UNISIG manufacturing investment in machining

Major investments in UNISIG facilities, machine tools and technology to increase capabilities for large size and close tolerance manufacturing of critical components.


Facilities expanded to over 100,000 sq ft (10,000 sq m) with added technologies for production and expanded inventory


UNISIG Fabrication Shop constructed to support in-house production of machine components.
CNC press brake, fiber laser, MIG and TIG welding investments installed as this new department was established.

1995 – 2020

Celebrating 25 years of continuous investment in research and development of the products and technologies that establish UNISIG as a globally recognized leader in the deep hole drilling industry. Hundreds of machines installed across many industries –Automotive, Mold, Defense, Oil and Gas, Energy, Aerospace and Medical. Supported installations in North America, Europe and Asia.