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SKF AB (Sweden) has acquired a 51% stake in U.S. seal manufacturer Macrotech Polyseal Inc. (MPI) for approximately USD $21 million.
Founded in 1973, MPI produces is a leader in fluid power seals based on polyurethane technologies and engineered plastics (primarily PTFE), targeting industrial customers in North America. Sales in 2005 were approximately $33 million.
MPI's product line is varied, with a wide array of molded and lathe-cut seals and sealing products, including dozens of types of rod seals, piston seals, buffer seals, rod wipers, and manifold seals.
The company also manufactures glass-filled reinforced Nylon bearings / wear rings.
MPI's 11 types of rod seals include the Spectraseal brand, 15 types of piston seals include the Capped T Seal and Crown Seal brands, 4 types of rod buffer seals, 8 types of rod wipers, and one rotary manifold seal. In addition, MPI produces a wide range of custom designs and applications, and recently added DuPont Viton as another fluoroeslastomer option.
MPI can manufacture seals in sizes from 1/16" through 50" diameter, and application temperatures can range from -400
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| FC67996 bearing | 44.31 | 61.83 | 3.81 |
| FC69100.1 bearing | 43.85 | 67.09 | 5.02 |