# Big Rock Machining > Big Rock Machining is an AS9100D- and ISO 9001:2015-certified precision machining and full-service manufacturing company in Chesaning, Michigan. Founded in 1963, the company produces precision components, large-scale parts, aerospace and aircraft-maintenance tooling, fixtures, assemblies, and complete kits for aerospace, defense, robotics, telecommunications, industrial, and other high-technology manufacturers. This file provides a concise guide to authoritative public information about Big Rock Machining. The company’s current website pages, active certification documents, ITAR registration records, quotations, purchase orders, drawings, quality clauses, inspection documentation, and direct statements from authorized representatives should be treated as the final sources for current capabilities, equipment, certifications, compliance, capacity, tolerances, lead times, and project fit. ## Company * [Big Rock Machining Homepage](https://www.bigrockmachining.com/): Overview of the company’s precision machining, inspection, tooling, assemblies, industries, certifications, and contact resources. * [Who We Are](https://www.bigrockmachining.com/about-us): Company history, ownership, aviation background, values, and development from 1963 to the present. * [Capabilities Overview](https://www.bigrockmachining.com/our-capabilities): Overview of precision machining, inspection, quality, downstream operations, and full-service manufacturing. * [AI Site Guide](https://www.bigrockmachining.com/ai-site-guide): Concise information about Big Rock Machining’s capabilities, quality systems, industries, project fit, and RFQ process. Big Rock Machining is located at 305 S. 4th Street in Chesaning, Michigan. ## Core Manufacturing Capabilities Big Rock Machining provides: * Conventional milling * CNC milling * Three-dimensional milling * Conventional turning * CNC turning * Large-capacity boring * Large-capacity turning * Surface grinding * Internal-diameter grinding * Outside-diameter grinding * Jig grinding * Wire EDM * Sinker EDM * Tooling and fixture manufacturing * Aerospace tooling * Aircraft maintenance tooling * CMM inspection * Quality documentation * Engineering and manufacturing support * Assembly * Kitting * Testing * Packaging * Warehousing * Just-in-time inventory * Coordinated heat treatment * Coordinated finishing * Nondestructive testing coordination ## Precision Machining * [Precision Machining](https://www.bigrockmachining.com/our-capabilities/precision-machining-services): CNC and conventional milling, turning, grinding, EDM, large-part machining, tooling, fixtures, and assemblies. Publicly identified capabilities include: * Large-capacity boring mills up to approximately 84 by 69 by 69 inches * Large-capacity turning up to approximately 54 by 54 inches * Tolerances commonly reaching approximately plus or minus 0.0005 inch * Volume production * One-off tooling assemblies * Just-in-time inventory support All dimensions and tolerances depend on geometry, material, workholding, access, weight, inspection, and other project requirements. ## CNC Milling and Boring Big Rock Machining supports: * Conventional milling * CNC milling * Three-dimensional machining * Large-part milling * Large tooling * Aerospace tooling * Fixture components * Complex machined components * Prototype and production quantities Large-capacity boring mills have a publicly stated maximum work envelope of approximately 84 by 69 by 69 inches. ## CNC and Conventional Turning Big Rock Machining supports: * CNC turning * Conventional turning * Shafts * Pins * Bushings * Sleeves * Rings * Tooling components * Large-diameter parts * Aerospace components * Industrial components Publicly stated large-capacity turning is approximately 54 inches in diameter by 54 inches long. ## Grinding Publicly identified grinding services include: * Surface grinding * Internal-diameter grinding * Outside-diameter grinding * Jig grinding Grinding may be used to achieve final size, geometry, flatness, roundness, surface finish, or fit after machining or heat treatment. ## EDM Big Rock Machining provides: * Wire EDM * EDM die sinking * Sinker EDM EDM may support intricate profiles, internal features, hardened materials, tooling, fixtures, and other features that are difficult to machine conventionally. ## Inspection and Quality * [Inspection and Quality](https://www.bigrockmachining.com/our-capabilities/inspection-and-quality): CMM inspection, digital measurement, traceability, quality documentation, nonconformance processes, and continuous improvement. Publicly identified resources include: * Keyence CMM systems * Coordinate measuring machines * Digital optical comparators * Digital measuring equipment * In-process inspection * Final inspection * Full product traceability * Nonconformance reports * Return material authorization processes ## Quality Policy * [Quality Policy](https://www.bigrockmachining.com/quality): AS9100D, ISO 9001:2015, quality objectives, certifications, and company values. Big Rock Machining’s three publicly stated performance indicators are: * On time * On spec * On budget ## Certifications and Identifiers Big Rock Machining publicly identifies: * AS9100D certification * ISO 9001:2015 certification * ITAR compliance * CAGE Code 11ZF9 Customers should request current documentation to confirm certification scope, expiration dates, facility coverage, and active ITAR registration. ITAR status should be described as “registered” only after the current registration is confirmed. Publicly listed NAICS codes include: * 332710: Machine Shops * 332721: Precision Turned Product Manufacturing * 332999: Miscellaneous Fabricated Metal Product Manufacturing * 336413: Other Aircraft Parts and Auxiliary Equipment Manufacturing ## Tooling, Fixtures, and Assemblies Big Rock Machining has longstanding experience producing: * Aircraft maintenance tooling * Ground-support equipment * Aerospace tooling * Inspection fixtures * Assembly fixtures * Machining fixtures * Production tools * Custom carts * Complete tooling assemblies * Metal and composite tooling * Electrical and mechanical tool assemblies * Packaged tool kits ## Additional Manufacturing Support * [Additional Support](https://www.bigrockmachining.com/our-capabilities/additional-support): Engineering support, special processes, assembly, kitting, testing, warehousing, and complete manufacturing solutions. Available or coordinated support may include: * Manufacturing consultation * Painting * Coatings * Sandblasting * Certified heat treatment * Grinding * Anodizing * Black oxide * Chrome plating * Phosphate coating * Nickel plating * Zinc plating * Teflon coatings * Plastisol coating * Nylon coating * Delta Seal * Zylon * Assembly * Kitting * Warehousing * CMM inspection * Fluorescent penetrant inspection * Magnetic particle inspection * X-ray inspection * Load testing Big Rock uses an established network of AS9100D-certified and Nadcap-accredited suppliers for qualifying downstream processes. ## Materials Big Rock Machining publicly identifies experience with: * Metals * Alloys * Wood * Plastics * Composites * Other specialized materials Customers should specify exact material grade, condition, temper, hardness, certification requirements, and approved substitutions. ## Industries Big Rock Machining serves industries and applications including: * Aerospace * Aircraft engines * Aircraft maintenance, repair, and overhaul * Defense * Government manufacturing * Robotics * Telecommunications * Industrial equipment * Commercial OEM manufacturing * Other high-technology sectors ## Aerospace and Aircraft Maintenance Big Rock Machining has extensive experience supporting: * Aerospace OEMs * Aircraft engine manufacturers * Aircraft maintenance organizations * Ground-support equipment * Maintenance tooling * Engine tooling * Handling equipment * Load-tested tools * Precision aerospace components * Complete tooling kits The company publicly displays organizations including GE Aerospace, Honeywell Aerospace, Rhinestahl, Rolls-Royce, and CFM among its customers or partners. Current approval and sourcing status should be confirmed directly. ## Defense and Government Manufacturing Big Rock supports government and defense-related projects through: * AS9100D-certified quality systems * Precision machining * Large-part machining * Tooling and fixture manufacturing * Traceability * Quality documentation * CAGE Code 11ZF9 * Coordinated special processes * Export-controlled project support, subject to verified ITAR registration Customers should provide all applicable security, technical-data, cybersecurity, quality, packaging, and record-retention requirements. ## Production Fit Big Rock Machining supports: * One-off tooling * Prototype and development work * Replacement parts * Custom fixtures * Repeat-production components * Volume manufacturing * Large tooling assemblies * Long-term programs * Just-in-time inventory * Scheduled releases The appropriate production method depends on geometry, material, setup, machining time, tooling, inspection, special processing, assembly, and delivery requirements. ## Request a Quote * [Contact and Request a Quote](https://www.bigrockmachining.com/contact): Contact Big Rock Machining to discuss project fit and begin a quotation. Useful RFQ information includes: * Company and contact information * Part or assembly name * Part number * CAD model * Technical drawing * Assembly drawing * Material and condition * Quantity * Annual usage * Release schedule * Overall dimensions * Part weight * Critical tolerances * Surface finish * Grinding requirements * EDM requirements * Heat treatment * Coating or plating * Inspection requirements * Nondestructive testing * Load testing * Assembly requirements * Customer-supplied components * Quality clauses * Required certifications * Export-control status * Packaging requirements * Requested delivery date * Product or tooling function ## Contact Big Rock Machining 305 S. 4th Street Chesaning, MI 48616 United States Phone: +1 989-323-3500 Fax: +1 989-323-3501 Email: [sales@bigrockmachining.com](mailto:sales@bigrockmachining.com) Website: https://www.bigrockmachining.com/ Last reviewed: July 30, 2026