Pepperell, MA

Recently acquired by Prince Industries, Pepperell (formerly Keystone Precision & Engineering) serves the Aerospace and Defense industries with excellence built upon three decades of innovation and dedication.

Long-time customers rely on Prince Pepperell because they’re assured of exacting attention to detail, quality, and on-time delivery. Pepperell is proud of the long-term relationships with key customers based on mutual respect, integrity, and trust. Pepperell has grown by investing in new equipment and technology.

Whether short runs, high-volume production, or start-to-finish assembly, Pepperell stands ready to meet your needs. Depending on part complexity, we can turn your job around within days of order.

Learn more about the Pepperell expansion.

Pepperell Capabilities

Rapid Prototyping

With multiple 3D printers in-house, Pepperell can create a part in as little as one day, depending on complexity. Pepperell CAD experts will review your part design and offer recommendations to improve manufacturing processes that lower costs. Suggestions include material, plating, and tolerancing across all production machining services. Once your prototype has been finalized, Pepperell can provide manufacturing solutions including short-run and production volumes.

Production Machining

Pepperell can meet your short-run or high-volume production requirements through a diverse array of CNC machinery and robotics – from 1 to 10,000 pieces. Production capabilities include multiple CNC Turning Centers and a fleet of lathes with tolerance capabilities down to .0002. Wire EDM specialists can produce both simple and complex parts with exceptionally tight tolerances and smooth finishes. Pepperell’s expertise includes precision deep hole drilling for fluid-filled chassis to aid in fluid flow and cooling.

Specifications 

  • Mill: Up to 50” x 26” x 30”
  • Turn: Up to 10” Diameter
  • Wire EDM:12” x 12”
  • Deep hole: 20”+ deep
  • Quantity: 1–10,000

Mechanical Assembly

Pepperell assembles complex box builds, sub-assemblies, and unique components for missiles, military drones, industrial machinery, and non-invasive medical devices. Parts and materials are tracked using barcoded work orders to ensure 100% traceability. Because efficient production assemblies – and fast time to market – are based on part design, Pepperell works with your engineering team to review designs before beginning production. All work adheres to ISO9001:2015 standards.

Quality Assurance

Pepperell’s process includes multi-level inspection procedures at every step of the manufacturing and assembly process. Formal first article and AS9102 reports are produced upon request.  As part of Pepperell’s commitment to continuous improvement, the team debriefs regularly. Ideas submitted by team members for process improvements are encouraged and rewarded. This intense focus ensures Pepperell delivers the highest-quality parts, know-how, and customer service that exceed expectations.

Interested in Partnering with Prince?

Pepperell Facility Certifications

PARTNER WITH PRINCE

What Our Customers Say

“Prince has been a strategic supplier of ours for the past 20 years. Over that time, they have collaborated with our engineering team at the early stages of a number of high-profile projects to support our business growth. The Prince team is highly dedicated, with skilled professionals in every aspect of their business. Because of their performance and professionalism, they have more than tripled their business with us over the last several years.”

Global Commodity Manager – Large Industrial Energy Controls Company

“Prince has been a partner of ours for many years. I find them to be a very reliable, professional and customer-focused company. We can count on them to deliver quality products on time and at a fair market price, which is why we continue to turn to them for our machining and fabrication needs.”

Purchasing Manager – Dental Imaging Company

“Prince has been a supplier to our business for well over 20 years. They are very responsive and always willing to align with us to better support our key business objectives. Prince provides consistently good quality and delivery performance. They are very much respected and viewed as a growth supplier to our business.”

Global Sourcing Manager – Large OEM Manufacturer

“We began working with Prince in 2023, and in just one year they have drastically improved manufacturing lead times to match our aggressive schedules, reduced costs, and provided excellent quality and customer service.”

Purchasing Manager • LEO Satellite Company

“Prince is genuinely excited to collaborate on challenging projects. Their talented engineers, quality team, and project managers continue to impress us with their unrelenting dedication and enthusiasm to manufacture groundbreaking aerospace hardware.”

Purchasing Manager • Aerospace Company