MACH3 Machining brings together three established operations—Hall Machine, Alloy Engineering, and J&J Precision Machining—as an AECO company in Cuyahoga Falls, Ohio. Built on decades of hands-on experience, it is known for taking on oversized industrial components that ordinary machine shops cannot accommodate, serving customers across heavy industry and OEM production. Its work centers on large-part machining, with components handled up to 192 inches in diameter and 50 tons in weight.
ISO 9001-compliant processes
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AWS D1.1
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AWS D1.6
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AWS D14.6
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AWS D14.1
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AWS D9.1
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AWS D17.1
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ASME Section IX
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2025 NorthCoast 99 Winner
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Employee-Owned Certified
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Brooklyn Machine & MfgFounded in 1923, family-owned Brooklyn Machine & Mfg. produces precision CNC-turned and milled component parts for heavy industry from its Cuyahoga Heights, Ohio operation. Nearly a century of machining experience is paired with large-capacity equipment, including a vertical turning center handling parts up to 52 inches in diameter and 48 inches tall.CLEVELAND, OH
Ewart-Ohlson Machine CompanyFounded in Akron in 1942, Ewart-Ohlson Machine Company now precision-machines medium and large components for aerospace, defense, energy, and other demanding applications from its Cuyahoga Falls plant. Its 38,000-square-foot facility is built for oversized work, with equipment capable of handling forgings weighing up to seven tons and machining landing-gear components among other massive parts. The company’s AS9100- and ISO 9001-certified quality system supports work ranging from Mars Exploration Rover mortar tubes to Airbus A380 landing-gear forgings.CUYAHOGA FALLS, OH
Kiefer Tool & Mold, IncSince 1965, Cleveland-based Kiefer Tool & Mold has machined, fabricated and repaired the oversized industrial parts and equipment that smaller shops cannot handle. Its 36,000-square-foot facility works on components weighing up to 100 tons, including custom hydraulic cylinders and press components, while also providing field inspections and emergency equipment repairs. After more than 50 years and three generations in business, Kiefer stands behind its workmanship with in-house inspection and testing.CLEVELAND, OH
Hahn Manufacturing CompanyFounded in Cleveland in 1916 by journeyman machinist Emil P. Hahn, Hahn Manufacturing Company remains a multigenerational domestic manufacturer of large, precision-machined OEM components. Today, Hahn’s third generation is still hands-on, combining large-part capacity with custom service for production and prototype work. The company is ISO 9001:2015 certified and ITAR registered, with lifting capacity up to 50,000 pounds and machining capability for parts up to 200 inches.CLEVELAND, OH