ABOUT OUR COMPANY
Transforming Industries through Innovative Precision Solutions
Tsubaki Nakashima (TN) Plastics, the Engineered Plastic Components Business Unit of Tsubaki Nakashima, is a trusted global provider with decades of experience serving the world’s leading medical OEMs. Our Michigan facility, originally established as Hoover Steel Ball in 1913, holds the distinction of being the first plastic ball manufacturer in the United States. Over the years, this site has evolved into a leader in contract injection molding and cleanroom manufacturing for medical-grade products. Its legacy of innovation and precision continues to drive excellence in manufacturing.
TN Plastics offers best-in-class, full-service contract injection molding and plastic ball manufacturing, known for exceptional quality, reliability, and superior customer support. Our advanced capabilities in cleanroom injection molding (Class 6–8 compliant) and FDA registration for medical device manufacturing ensure high-quality products for medical diagnostics, surgical instruments, and other critical healthcare applications.
By leveraging our global network and innovative processes, TN Plastics continues to set industry standards for quality and reliability while maintaining its position as a pioneer in engineered plastics.
CERTIFICATIONS
ISO 9001, ISO 13485 (Medical Devices), ISO 14001 (Environmental Management), FDA registration.
CORE COMPENTENCIES
Precision plastic balls, and contract injection molding.
TOP 10
Recognized partnerships with top 10 medical OEMs worldwide
1913
Hoover Steel Ball was founded in Ann Arbor, Michigan and began production of precision balls
1978
Initially founded as Hoover Precision Parts with plastic ball manufacturing plant in Michigan’s Upper Peninsula, Sault Ste. Marie
1990
Tsubaki Nakashima acquired Hoover Steel Ball, operating under the name Hoover Precision Products, Inc.
2003
The company officially rebranded to TN Michigan, LLC, aligning with the Tsubaki Nakashima global identity.
2017
The company officially rebranded to TN Michigan, LLC, aligning with the Tsubaki Nakashima global identity.
2023
Acquired Rispa, creating multi-national injection molding capabilities across North America and Europe
2025
Supporting injection molding and plastic ball manufacturing in both Michigan and Italy.
Our history
FEATURED CASE STUDIES
At TN Plastics, we have a proven track record of delivering exceptional quality and innovative solutions across diverse industries. Below are some detailed case studies showcasing our expertise:
SERVICES & PRODUCTS
At TN Plastics, we specialize in delivering high-quality precision engineered plastic components that transform industries. Our expertise spans precision plastic balls, beads, and contract injection molding, serving diverse sectors such as medical, technology, fluid dispensers, and industrial applications. With a strong global presence and advanced manufacturing capabilities, we are committed to providing innovative solutions tailored to meet the evolving needs of our customers.
Precision Plastic Beads/Balls
Contract Injection Molding
INDUSTRIES SERVED
At TN Plastics, we specialize in delivering high-quality precision engineered plastic components that transform industries. Our expertise spans precision plastic balls, beads, and contract injection molding, serving diverse sectors such as medical, technology, fluid dispensers, and industrial applications. With a strong global presence and advanced manufacturing capabilities, we are committed to providing innovative solutions tailored to meet the evolving needs of our customers.
MEDICAL Devices
TN's precision plastic beads and injection-molded components are used in medical diagnostics, surgical tools, and point-of-care devices, ensuring high performance, biocompatibility, and compliance with stringent medical standards.
TECHNOLOGY & robotics
Precision balls and rollers enhance the efficiency and reliability of robotic systems, enabling smoother motion control and reduced weight for advanced automation solutions.
FLUIDs & DISPENSERS
TN's plastic balls are widely used in dispensing systems for consumer goods, offering lightweight, durable, and cost-effective solutions for applications like check valves, pumps, and agitators.
INDUSTRIAL
TN's plastic balls and injection molded parts are used in applications from automotive gear-shifting to government applications.
PARTNERSHIPS & INNOVATIONS
Our success is built on strong partnerships and a relentless focus on innovation. By collaborating with industry leaders, such as the Michigan Economic Development Corporation and Connex, TN drives advancements in precision manufacturing and sustainability. These partnerships, combined with cutting-edge product launches and engineering expertise, position TN as a trusted global partner delivering transformative solutions across industries.
Global Reach, Local Support
At TN Plastics, we pride ourselves on our global presence, with strategic locations in the United States and Europe. Our facilities in Sault Ste. Marie, Michigan, and Mirandola, Italy, enable us to provide localized support and rapid delivery to customers worldwide. This global footprint allows us to serve diverse industries effectively, combining international expertise with regional responsiveness.
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