Bison Capital and Angeles Equity Partners Acquire Precision Surfacing Solutions

Los Angeles, CA – October 18, 2022— Bison Capital Partners VI, LP (“Bison Capital”) and an affiliate of Angeles Equity Partners, LLC (“Angeles”) have acquired Lapmaster Parent, LLC (“Precision Surfacing Solutions” or “PSS”), a manufacturer of specialized precision machinery for lapping, grinding, cutting, and polishing substrates used in the manufacture of precision parts in semiconductor, aerospace, and general industrial markets. Bison Capital and Angeles will partner with Brian Nelson, founder of PSS, and together, they will drive the next stage of the company’s growth.  

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About Precision Surfacing Solutions

PSS is an industry leader in the development of technology to produce micron-accuracy surface finishes. Under the well-recognized Lapmaster, Peter Wolters, Kehren, ELB, Micron, Aba, and REFORM brands, PSS has a proven history of successfully developing cost-effective processing solutions for the lapping, polishing, fine grinding, brush deburring, creep feed grinding, bore honing, double disc grinding, buffing through an expanding network of sales and services offices located throughout the world. The Company’s 9,000+ active global customers utilize precision abrasive finishing technology for various end-user precision finishing applications. PSS is headquartered in Mt. Prospect, IL, USA.


Bison Capital is a Los Angeles and New York based private equity firm that makes growth capital investments in middle‐market companies, public or private, for expansion, acquisitions, and balance sheet recapitalizations. The firm’s primary investment focus is partnering with entrepreneurs and management teams seeking capital to grow their businesses.