Glyne’s multi‑station rotary and taper swagers deliver precision diameter reduction, variable‑wall butting, and long‑taper forming on aerospace‑grade tubing in one heat. Closed‑loop servo hammering, in‑line eddy‑current monitoring, and SPC ensure concentricity, surface finish, and grain flow exceed AMS 2241 and ASTM A269 while rapid die changeovers streamline prototype‑to‑production transitions.

Rotary-Swaged Aluminum Rod Blanks with Precision Reduced Ends

Swaging is a radial-forging forming process that plastically reduces or reshapes the cross-section of bar, rod, or tube by cyclic hammer blows from opposing dies. Material flows inward around the mandrel (solid rod) or outward over a mandrel (hollow tube), enabling precise diameter reduction, tapered profiles, or wall-thickness redistribution with minimal scrap.

Swaging

Supports high volume production demands, ensuring scalability and competitive cost for large-scale orders.

Meets the needs of medium volume production, offering cost efficiency for expanding product lines.

Designed for prototyping and small batch runs, allowing for rapid iteration and testing.

Optimized for low volume production, ideal for market introduction and specialized products.

Rotary Swaging uses a ring of segmented dies that orbit around the workpiece, delivering rapid radial hammering to incrementally reduce diameter or form specialised profiles without interrupting material flow.

Rotary Swaging

Long-Taper Swaging progressively reduces tube or rod diameter over extended lengths (typically >10× starting OD) to create smooth, uniform tapers used in medical mandrels, impact strikers, or drive shafts.

Long-Taper Swaging

Tube Butting swages specific zones of a tube to locally thicken the wall (butt) while retaining a lightweight centre section—common in bicycle frames, hydraulic lines, and precision instrumentation tubing.

Tube Butting (Variable-Wall Thickening)

Cold Swaging performs the swaging operation below the alloy’s recrystallisation temperature, yielding fine grain structure and significant work-hardening for enhanced strength and dimensional precision.

Cold Swaging

Hot Swaging heats the workpiece to elevated temperatures (typically 900 – 1 200 °C for steels) to enable larger reductions per pass, form high-strength alloys, or achieve extreme shape changes with lower forming loads.

Hot Swaging

Precision Tube Swaging & Cold Forming

Glyne’s servo-actuated end-forming cell combines expanding, flaring, beading, and neck-down in one clamping—delivering leak-free joints and hose-retention features in less than five seconds per cycle. Programmable segmented dies and in-situ angle/OD metrology guarantee repeatable geometry on stainless, titanium, and nickel-alloy tubing for aerospace and fluid-transfer assemblies.

Tube End Forming encompasses a family of cold-forming operations that locally reshape the open end of a tube—expanding, reducing, flaring, beading, or otherwise modifying geometry—so the tube can mate, seal, or connect without added fittings.

Tube End Forming

Tube Expanding increases the inside and outside diameter of the tube end by forcing a tapered arbor or segmented die outward, producing an interference fit or seal surface without adding material.

Tube Expanding

Tube Flaring forms an outward conical lip on the tube end—most commonly 37° or 45°—to create metal-to-metal sealing faces for flared fittings or to prepare the tube for brazed joints.

Tube Flaring (37° / 45° & Custom Angles)

Tube Beading creates an external circumferential ridge (single or double) near the tube mouth, or rolls the lip 180 ° back onto itself, providing a mechanical stop or hose-retention feature without welding.

Tube Beading / Roll-Over Ends

Neck-Down End Reduction swages or rolls the tube end inward to a smaller diameter, producing a male spigot or slip-fit section while maintaining wall thickness and concentricity.

Neck-Down End Reduction

Tube End Forming Services

Multi-axis CNC milling, live-tooled turn-mill lathes and precision internal honing deliver fully finished, tight-tolerance prismatic or tubular components in one continuous workflow. Integrated pallet systems, in-process probing and SPC feedback enable lights-out throughput while maintaining ±0.005 mm positional accuracy and sub-micron surface finishes.

Machining encompasses a variety of manufacturing processes aimed at shaping and removing material from a workpiece. This includes both computer-controlled processes, such as CNC milling, turning, and routing, as well as non-traditional methods like Electrochemical, Chemical, and Photochemical Machining.

CNC Machining

CNC Turning uses computer-controlled lathes to rotate bar, billet, or cast blanks while single-point cutting tools remove material. The process excels at producing concentric OD/ID features, tapers, threads, grooves, and complex contours with tight positional accuracy. Modern CNC lathes support live tooling, Y-axis interpolation, sub-spindle part transfer, and bar-feed automation—enabling complete, high-volume production of precision cylindrical components in metals or plastics.

CNC Turning

CNC Milling removes material with rotating cutters under precise multi-axis computer control, producing complex prismatic or sculpted parts with positional accuracy to ±0.005 mm and surface finishes ≤ Ra 0.4 µm. Machines span 3-axis vertical mills, 4-axis horizontals with pallet changers, and full 5-axis trunnion or gantry platforms, supporting everything from rapid prototypes to lights-out production in metals, plastics, and composites.

CNC Milling

Honing refines geometry, surface texture, and dimensional accuracy using abrasive stones, typically in cylindrical forms (e.g., engine cylinders, hydraulic bores). This precise finishing process is vital in industries requiring tight tolerances.

Honing

Threading is a CNC turning operation used to produce internal or external threads on a workpiece. It involves rotating the workpiece and cutting tool in synchronization to create precise screw threads, essential for components requiring threaded connections.

Threading

Polishing / Grinding encompasses abrasive stock-removal and surface-refinement operations applied after rough machining or heat treat. Grinding with bonded-abrasive wheels (Al₂O₃, SiC, CBN, diamond) brings parts to final size, geometry, and flatness, routinely holding ±0.002 mm and roundness < 0.001 mm on hardened steels > 60 HRC. Subsequent polishing stages—belt, buff, super-finishing, micro-finishing, or lapping—reduce surface roughness to Ra 0.05 µm–0.20 µm, produce plateau finishes for bearing surfaces, or achieve mirror cosmetics before coating or plating. Coolant-flooded machines, automatic size-control gauging, and filtered oil or water emulsions ensure thermal stability and contamination-free finishes for aerospace, medical, mould-and-die, and precision fluid-power components.

Polishing / Grinding

CNC Machining & Honing

CNC mandrel and multi-plane tube bending up to 3″ OD integrates inline TIG welding and silver-or nickel-brazing to deliver leak-free hydraulic, fuel, and structural tube assemblies in a single controlled cell. Programmable boost, pressure-die assist, and real-time bend simulation minimize wrinkling and ensure ±0.2 mm cumulative accuracy even on complex 3-D paths.

Tube Bending comprises cold-forming operations that permanently reshape straight tubing into precise radii and compound geometries using mandrel, rotary-draw, or roll-bending techniques while maintaining cross-sectional integrity.

Tube Bending

CNC Mandrel Bending inserts a solid or articulated mandrel inside the tube while a rotary-draw bender forms tight-radius bends, preventing collapse and maintaining wall thickness—ideal for hydraulics, aerospace, and exhaust systems.

CNC Mandrel Bending

Multi-Plane Tube Bending performs successive bends about different axes in a single CNC program, creating complex 3-D shapes without intermediate repositioning; common in fuel lines, HVAC coils, and structural frames.

Multi-Plane Tube Bending

Assembling involves putting together various metal components to form a complete unit. This can include methods like welding, riveting, and using threaded fasteners.

Assembling

Gas-tungsten-arc welding employing a non-consumable tungsten electrode for precision, low-spatter welds on thin or critical materials including stainless steel, aluminium and titanium.

TIG (GTAW) Welding

Brazing joins metals by melting a filler alloy with a lower melting point than the base metals, effective for leakproof or complex assemblies.

Brazing

Tube Bending & Assembly Fabrication

In-house CMM, System 22 thread gauging, ultrasonic wall-thickness, borescope, and pressure/leak testing provide full verification from first-article to lot acceptance, ensuring geometric, structural, and integrity compliance for aerospace-class tube and machined components.

Inspection and Quality Control encompass a range of processes and techniques used to verify that manufactured parts and products meet required specifications, quality standards, and regulatory requirements. This includes visual inspections, dimensional checks, non-destructive testing, and automated inspection systems.

Inspection and Quality Control

Dimensional Inspection verifies that a part’s physical dimensions match design tolerances. Tools include calipers, micrometers, and CMMs, ensuring geometric accuracy of length, width, height, angles, and more.

Dimensional Inspection

System 22 Thread Gauging verifies that external and internal screw threads meet pitch-diameter, flank-angle, lead, and roundness requirements using GO/NO-GO gauges conforming to ASME B1.3M ‘System 22’. The method supplements CMM or vision checks with tactile gauge acceptance to ensure functional interchangeability of threaded parts in aerospace, fluid-power, and precision-instrument assemblies.

System 22 Thread Gauging

Ultrasonic Wall-Thickness Testing (UT-WT) uses pulse-echo ultrasonic transducers to measure the remaining wall of tubes, pipes, and structural components without cutting them open. The digital A-scan display and automatic velocity compensation allow rapid detection of thinning, corrosion, or eccentricity while the part remains in service or during incoming inspection.

Ultrasonic Wall-Thickness Testing

Borescope Internal Inspection introduces a rigid or flexible optical probe with integrated LED illumination into small or obstructed cavities to perform real-time visual examination. High-resolution sensors, articulation, and measurement overlays enable detection of burrs, FOD, weld root defects, and surface finish anomalies that external NDT methods cannot capture.

Borescope Internal Inspection

Pressure / Leak Testing pressurises a component or assembly with air, inert gas, water, or hydraulic oil to verify structural integrity and leak-rate compliance. Methods include hold-pressure decay, differential pressure, and mass-flow measurement, supporting ratings from vacuum to 70 MPa. The process complements helium mass-spectrometer tests for applications where larger or non-hermetic leakage limits apply.

Pressure / Leak Testing

Inspection & Testing Services

A global standard for quality management systems focusing on continuous improvement and customer satisfaction.

ISO 9001:2015

Registration under the International Traffic in Arms Regulations (ITAR), 22 CFR §122, with the U.S. Department of State’s Directorate of Defense Trade Controls (DDTC). It authorizes a U.S. person or entity to manufacture, export, or broker defense articles, defense services, or related technical data listed on the United States Munitions List (USML), and is prerequisite to obtaining ITAR export licenses or Technical Assistance Agreements.

ITAR Registration

Industry-managed accreditation granted by the Performance Review Institute verifying special-process conformity (e.g., heat treating, NDT, coatings) to aerospace specifications under the Nadcap program.

Nadcap Accreditation

Customer-conferred designation recognizing suppliers that consistently meet or exceed quality, delivery, cost, and service metrics, enabling streamlined procurement and reduced incoming inspection.

Certified Gold Supplier Status

Compliance with Federal Acquisition Regulation (FAR) and Defense Federal Acquisition Regulation Supplement (DFARS), necessary for U.S. government and defense contracting.

FAR/DFARS Compliance

Compliance with the RoHS 3 (Restriction of Hazardous Substances) directive, limiting hazardous materials such as lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE flame retardants in electronic and electrical products sold in the EU.

RoHS 3 Compliance

Compliance with the European Union's REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulation, ensuring that chemical substances in manufactured products meet safety standards for human health and the environment.

REACH Compliance

Active registration in SAM.gov confirming the entity is eligible to receive U.S. Federal contracts and grants; includes assignment of a Unique Entity ID (UEI) and CAGE code.

System for Award Management (SAM) – Active Registration

Commercial and Government Entity (CAGE) code registration assigns a unique five-character identifier to suppliers doing business with U.S. federal agencies and defense customers through SAM.gov.

CAGE Code Registration

Dun & Bradstreet’s Data Universal Numbering System assigns a unique nine-digit D-U-N-S® Number to business entities for global identification, supplier onboarding, and credit reporting.

D-U-N-S® Number Registration

Cybersecurity compliance standards outlined in NIST SP 800-171, mandatory for companies handling Controlled Unclassified Information (CUI) in federal and defense contracts.

NIST SP 800-171 Compliance

The design, fabrication, and assembly of diverse products across multiple end‐use industries or specialized, project‐based needs. Emphasis is on versatility, custom solutions, and broad expertise to handle unique or varied manufacturing projects outside of more narrowly defined sectors.

General Manufacturing

Provides rotary swaging, end forming, and CNC machining for diverse commercial and industrial tube and rod applications, with in-process inspection ensuring blueprint compliance.

The design, manufacturing, and integration of high‐precision components, systems, and subsystems for commercial aircraft and military platforms, with emphasis on meeting stringent certifications such as AS9100, ITAR, and MIL‐STD. Priorities include advanced materials, rigorous quality assurance, and robust engineering to ensure reliability in mission‐critical applications.

Aerospace & Defense

AS9100D-certified rotary swaging, tube forming, and CNC machining of flight-control rods and structural tube assemblies for commercial and military aircraft.

The development, manufacturing, and supply of precision-engineered medical systems, devices, and critical components, including diagnostic equipment, surgical instruments, implantable devices, laboratory systems, and precision medical components. Emphasizes adherence to ISO 13485 and FDA QSR standards, traceability requirements, sterile processing, rigorous validation, and use of biocompatible materials such as titanium, stainless steel, and medical-grade polymers to ensure patient safety and clinical effectiveness across global healthcare settings.

Medical Devices & Healthcare Equipment

Forms and machines thin-wall stainless and titanium tubing for surgical tools, diagnostic equipment, and implantable device assemblies.

The design, manufacturing, and assembly of components and systems for passenger cars, commercial and off-highway vehicles, rail rolling stock, and emerging electric/Autonomous mobility platforms. High-volume production, IATF 16949 compliance, JIT supply chains, and continuous innovation ensure reliable powertrains, safety-critical systems, and cost-efficient delivery across a broad transportation landscape.

Automotive & Transportation

Supplies precision swaged and threaded steel and aluminum tube components used in steering, suspension, and sensor housings for automotive platforms.

Upstream exploration and drilling, midstream transport, refining, and integrated petrochemical processing. Designs must withstand high pressure, corrosive media, and hazardous environments while meeting API/ASME and IECEx/ATEX safety standards across global operations.

Oil, Gas & Petrochemical

Produces corrosion-resistant, high-pressure tube reductions and flanges for petrochemical instrumentation lines and down-hole tool assemblies.

The design and production of large‐scale machinery, automation systems, and heavy equipment for industrial applications, where reliability and performance are paramount. Adherence to ISO, ANSI, and other applicable standards supports continuous operation under high‐stress conditions, with custom‐engineered systems often required.

Industrial Machinery & Heavy Equipment

Delivers heavy-wall swaged shafts and precision machined tubular parts for industrial machinery and heavy-equipment actuators subjected to cyclic loads.

Glyne Manufacturing Co., Inc. is an AS9100D-certified custom manufacturer specializing in rotary swaging, tube end-forming, and CNC machining. Operating from a single Stratford, CT plant, the company shapes aluminum, stainless, titanium, and nickel tubing into flight-control rods, fuel-system lines, and structural mounts for commercial and military aircraft. Ten rotary swagers, CNC lathes, vertical mills, ultrasonic gauges, and borescopes achieve ±0.001-in tolerances. Lot traceability, SPC, and ISO-aligned procedures back three- to six-week prototype-to-mid-volume runs, while NADCAP partners deliver heat treat and finishing for medical, automotive, petrochemical, and industrial applications.

The 8 000-ft² Stratford headquarters houses ten rotary swagers, CNC lathes, vertical machining centers, and dedicated inspection labs under a single-site AS9100D QMS. Less than two miles from I-95 and Sikorsky Memorial Airport, the site offers quick inbound material access and same-day carrier pickup for prototype-to-mid-volume aerospace and industrial tube assemblies.

Glyne Manufacturing Headquarters

AS9100D certified rotary swaging, tube end forming, and CNC machining for aerospace and industrial markets.

Glyne Manufacturing

Rotary Swaging & Tube Machining

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