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Copyright 2019 - Posi Lock Puller, Inc. | 805 Sunflower Avenue | Cooperstown, North Dakota 58425 USA | Phone: +1-701-797-2600 | Toll Free: 1-800-533-5761 | Fax: +1-701-797-2706

About Us


For over 35 years, Posi Lock Puller Inc. has been providing consumers with top-of-the-line products and services. Such extraordinary success does not come easy; passion, patience and persistence have been the key to transforming our company from humble beginnings, to the quality-focused manufacturer it is today.

In 1974, Dean Somerville, founder of Posi Lock, was operating a machinery repair shop and a farming operation. Dean saw the need for a self-aligning, universal puller that would remove gears and bearings safely and quickly. With his inventive spirit and mechanical background he developed the unique Posi Lock Safety Cage® design. The Posi Lock puller was immediately recognized as a significant advance in the gear and bearing puller industry, paving the way for future success; however, no company is without hardship and heartache.

In 1984, during an exciting growth period, a fire broke out in Posi Lock's McHenry, North Dakota facility. The building was completely destroyed, and all its contents lost. Not to be deterred from the devastation of the fire, Dean purchased office space and a warehouse in Cooperstown, North Dakota, where the company rebuilt, and where it continues to thrive.

Today, Posi Lock Puller, Inc. is a woman-owned business. Vice President Tamara Somerville, Dean’s daughter, continues to develop strong international alliances around the globe. Posi Lock has an excellent reputation and is known as being hard-working and dedicated to the quality of our products and services. The mission statement says it all:

To offer the most unique ‘fun’ customer service and sales support to our valued channels of distribution while producing superior lines of products in our chosen industries and creating a corporate culture of innovation, pride and prosperity.

As a leader in the industry, Posi Lock continues to aggressively research and develop products and specialty items. At Posi Lock, one will always find a highly skilled, motivated team focused on the goal of providing excellent products and service—without losing sight of its most important asset…



Posi Lock offers manual pullers in 1- to 40-ton capacity, hydraulic pullers in 5- to 200-ton capacity, specialty pullers, vices, and tools. Posi Lock products are available through select distributors worldwide.

For more information on the complete line of Posi Lock products, please contact one of our knowledgeable Sales Executives today at +1-701-797-2600.


Learn More: About our company history

Learn More: About our CEO

Learn More: Download our 25th Anniversary catalog!