for mission-critical performance
Precision
with Purpose
More than 40 years delivering precision gundrilling solutions for aerospace, defense and advanced industrial applications—from prototype to full-scale production.
AS9100D & ISO 9001 certified.
Our markets | Precision gundrilling
Precision Solutions for the world's most demanding industries
Grover delivers precision deep hole drilling and machining solutions for industries where quality, reliability, and performance are essential. From aerospace and defense to advanced manufacturing, we partner with customers to produce mission-critical components that meet the highest standards.
Aerospace
Grover manufactures high-precision components for the aerospace industry, where every tolerance matters. Our expertise supports demanding applications requiring exceptional accuracy, material integrity, and consistent quality.
- Precision deep hole drilling
- Tight dimensional tolerances
- Complex machining
- Reliable quality and full traceability
Defense
Trusted by defense manufacturers, Grover provides precision-machined components designed for mission-critical applications. Our compliance with industry standards ensures dependable performance throughout every project.
- ITAR-registered manufacturing
- High-performance specialty materials
- Certified quality management
- Secure and dependable production processes
Industrial
Grover Precision supports manufacturers across a wide range of industrial markets where precision, reliability, and consistent performance are essential.
- Energy
- Oil & Gas
- Nuclear
- Power Generation
- Industrial Equipment
Years of excellence
Employees
Active Customers
Square feet manufacturing space
Our capabilities
Explore our equipment and manufacturing capabilities
Grover Precision offers a comprehensive range of manufacturing capabilities designed to support the production of critical components. From specialized equipment to value-added services, our capabilities are built to meet the demanding requirements of aerospace, defense, energy, and industrial applications.
Project Development
Engineering team available to handle complex project development.
- Prototype manufacturing
- Design validation support
- Process development
- Feasibility evaluation
Streamlined supply chain
From material sourcing to coordination with multiple suppliers, Grover is a one-stop solution for complexe projects.
- One-stop manufacturing solution
- Material sourcing
- Inventory Management
Quality control
Our quality control capabilities combine in-process inspections and final verification to ensure consistent quality and compliance with customer requirements.
- In-process inspections
- Material traceability
gundrill
With more than 50 gundrill spindles in the house, Grover has become a household name in deep hole drilling, from prototype to large volume production.
- 50+ gundrill spindles
- Tight tolerances
- Small and large components
- Competitive lead time
pilger mill
Precision pilger milling capabilities support the production of formed cannulated bars with exceptional dimensional accuracy and repeatability.
- 12 ft cannulated bars
- Small ID down to .055"
- Stainless Steel grades
Honing
Our precision honing capabilities support customers requiring high-quality internal finishing for critical component applications.
- Improved surface finish
- Tight dimensional tolerances
- Enhanced bore geometry
- Consistent results across production volumes
Fixture design
Whether you need a supplier to outsource gundrilling or you need a partner to develop new solutions, Grover has the right engineering team to help you succeed.
- Compliant with highest standards
- Over 40 years of exprience
- CNC machines
- Tailored solutions
drill stock
Grover maintains an extensive inventory of drills in a wide range of diameter and lengths, enabling fast setup and reduced lead times.
- Extensive range of drill diameter
- Reduced lead time
- Fast project turnaround
- Maintained and inspected tooling
Centerless Grinding
From raw material procurement to precision centerless grinding, Grover provides integrated manufacturing solutions through a single trusted supplier.
- Streamlined supply chain
- Customer supplied or Grover-sourced material
- Excellent surface finish
Quality
Certified for Critical Industries
Quality, compliance, and accountability are fundamental to every project at Grover Precision.
Customers operating in aerospace, defense, energy, and other highly regulated industries depend on suppliers that can consistently meet rigorous quality requirements while maintaining complete control of manufacturing processes and documentation.
Grover’s certifications, registrations, and compliance programs demonstrate our commitment to delivering precision gundrilled components that meet the expectations of the world’s most demanding industries.
Build on a foundation of Quality
When selecting a manufacturing partner for critical applications, certifications are more than credentials—they provide confidence that processes, controls, and continuous improvement systems are in place to support consistent results.
Grover maintains internationally recognized certifications and compliance programs that support customer requirements across commercial, aerospace, defense, and regulated markets.
Our certifications & compliance
AS9100D is the internationally recognized quality management standard for the aerospace and defense industries.
This certification demonstrates Grover's commitment to:
Risk-based thinking and process control
Continuous improvement
Product conformity
Supply chain management
Customer satisfaction
Regulatory compliance
AS9100D certification provides aerospace and defense customers with confidence that Grover operates under a quality system specifically designed for mission-critical applications.
ISO 9001:2015 establishes the framework for consistent quality management across all aspects of our business.
Through documented procedures, process monitoring, and continuous improvement initiatives, Grover maintains a system focused on delivering reliable products and exceptional customer service.
ISO 9001 certification reflects our commitment to:
- Consistent manufacturing processes
- Customer-focused operations
- Continuous improvement
- Quality-driven decision making
- Process efficiency and accountability
ISO 13485:2016 is the internationally recognized quality management standard for medical device manufacturing.
While Grover's primary focus includes aerospace, defense, energy, and industrial applications, this certification demonstrates our ability to operate within highly regulated environments that require stringent process controls, documentation, and traceability.
The discipline required to maintain ISO 13485 certification reinforces the quality culture applied throughout our organization.
Grover is registered under the International Traffic in Arms Regulations (ITAR).
ITAR registration supports customers involved in defense-related programs and controlled technologies by helping ensure compliance with U.S. regulations governing defense articles and technical data.
This registration enables Grover to support projects requiring controlled manufacturing environments and enhanced regulatory oversight.
Cybersecurity is an increasingly important requirement throughout the defense industrial base.
Grover supports customer cybersecurity expectations through compliance initiatives aligned with the Cybersecurity Maturity Model Certification (CMMC) framework.
These efforts help protect sensitive information while supporting defense contractors and government-related programs that require robust cybersecurity practices.
Grover supports customer requirements related to the Defense Federal Acquisition Regulation Supplement (DFARS).
DFARS requirements establish standards for cybersecurity, information protection, and supply chain security throughout the defense manufacturing ecosystem.
By maintaining compliance with applicable DFARS requirements, Grover helps customers meet contractual and regulatory obligations while reducing supply chain risk.
Grover maintains an active Commercial and Government Entity (CAGE 9CKJ4) Code, enabling participation within government and defense supply chains.
A CAGE Code serves as a unique identifier for companies supporting federal government and defense-related procurement activities and facilitates efficient supplier qualification and program participation.
Download our certificates
About Grover Precision
Precision Manufacturing built on Partnership
For over 40 years, Grover Precision has helped manufacturers solve complex drilling and machining challenges across aerospace, defense, energy, and industrial markets.
Based in Maine, USA, we combine technical expertise, manufacturing excellence, and responsive customer support to deliver precision solutions where performance and reliability are critical.
- Alec MacKenzie (General Manager)
Today, as part of the Forécreu Group, Grover offers customers the strength of an international industrial organization while maintaining the agility and responsiveness of a trusted manufacturing partner.
Precision with Purpose. Built for Performance.
Get in touch
Have you found what you're looking for?
Contact Grover today to discuss your defense gundrilling requirements and
learn how our team can support your next mission-critical program.
