CNC Milling at Putnam Precision Products employs advanced multi-axis machining centers to precisely remove material from metals and plastics. Capable of 3 to 5-axis simultaneous operations, it produces complex prismatic and sculpted parts with positional accuracy to ±0.005 mm and surface finishes as fine as Ra 0.4 µm. This capability supports rapid prototyping through lights-out production for aerospace, medical, and general engineering applications.

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

Face Milling is a machining process where the cutting tools are perpendicular to the workpiece, removing material from its surface to create a flat face. This technique is ideal for achieving high-quality finishes and flat surfaces on the workpiece. Face Milling is widely used in various applications, including the production of flat surfaces on castings and forgings, as well as for preparing surfaces for further processes.

Face Milling

Plain Milling, also known as slab milling, is a process that involves using a horizontal or vertical milling machine to produce flat surfaces. This milling operation uses a cutting tool with multiple cutting edges to remove material from the surface of a workpiece in a horizontal plane, creating a flat or squared surface.

Plain Milling

Angular Milling is a process where the milling cutter is positioned at an angle relative to the surface of the workpiece. This technique is used to create angular features such as chamfers, serrations, and grooves. It requires specialized angular cutters and is known for its precision in creating intricate angular geometries.

Angular Milling

Form Milling involves the use of milling cutters of a specific form to create curved or irregular surfaces on the workpiece. This process is utilized for milling complex shapes and profiles such as contours, grooves, and channels. Form milling requires cutters shaped to the contour to be cut, making it highly versatile for custom shapes.

Form Milling

Reaming is a finishing process used in CNC milling to slightly enlarge holes and improve their accuracy and surface finish. This process is performed using a reamer and is essential for precise hole specifications, ensuring tight tolerances and a smooth interior surface of the hole, often required in high-precision engineering applications.

Reaming

Tapping is a process in CNC milling used to create internal threads within a hole, allowing for the insertion of a threaded bolt or screw. This process requires precision to ensure thread integrity and alignment. Tapping is widely used across various industries, particularly in assembly and mechanical components where threaded fastening is essential.

Tapping

Counterboring is a machining process that enlarges a hole to a specific diameter and depth, often to accommodate a bolt head or nut. This process ensures that fasteners sit flush with or below the surface of the material, providing a neat finish and structural integrity. Counterboring is commonly performed after drilling and is vital in mechanical assemblies where precision and aesthetics are crucial.

Counterboring

Countersinking involves creating a conical hole that matches the angle of a flat-head screw or bolt. This process allows the head of a fastener to sit flush with or below the surface of the material. Countersinking is essential in applications where a smooth surface is needed and is commonly used in carpentry, metalworking, and manufacturing industries.

Countersinking

Slot Milling is a process where a milling cutter is used to create slots or grooves in a workpiece. This operation is essential for creating keyways, slots for components, and other features that require precise grooves. Slot milling can be performed on various materials and is critical in manufacturing industries for component assembly and mechanical functions.

Slot Milling

Surface Milling, also known as face milling, involves removing material from the surface of a workpiece to produce a smooth, flat surface. This process is widely used for finishing operations and in creating large flat surfaces with high precision. Surface milling is vital in automotive, aerospace, and mold-making industries.

Surface Milling

Gear Milling is a specialized process used to create gear teeth profiles on a workpiece. Utilizing specialized cutters and precise calculations, this process is essential for manufacturing various types of gears used in automotive, machinery, and equipment industries. Gear Milling requires high precision to ensure the proper functioning of the gear mechanism.

Gear Milling

Drilling is a versatile machining process used across various manufacturing methods, including CNC milling and turning. It involves creating precise holes in a material using a drill bit. This operation is vital for achieving accurate hole placement with varying diameters and depths. Drilling is known for its ability to produce clean, straight cylindrical holes and is utilized across diverse materials like metals, plastics, and wood.

Drilling

Boring is a precision machining process focused on enlarging pre-existing holes in a material. This operation is essential in both CNC milling and turning, where it's used to achieve greater accuracy and smooth internal surface finishes. Boring allows for the creation of holes with tight tolerances and is often employed in applications requiring precise hole sizes, such as in engine cylinders and hydraulic systems.

Boring

Simultaneous 5-Axis Machining enables continuous, synchronized movement of all five machine axes, drastically reducing setups and facilitating the creation of highly intricate geometries with superior surface finishes.

Simultaneous 5-Axis Machining

Performs simultaneous rotary-axis milling to trim complex cast-part geometries in a single setup, improving accuracy and cycle time.

4th-Axis Milling

Uses 20 000 rpm spindles to rough and finish H13 semi-solid casting dies, achieving fine surface finish and tight cavity tolerances in hardened steel.

High-Speed Die Machining

Creates deep core details, ejector slots, and sharp interior corners in die steel by spark-erosion where conventional milling cannot reach.

Sinker EDM

Cuts precise slide lugs, gate inserts, and other through-features in die components using continuous wire spark-erosion for ±0.005 mm accuracy.

Wire EDM

Employs pallet changers and queued job scheduling for lights-out milling of high-volume cast-part trimming operations.

Automated Pallet Machining

Uses Renishaw touch probes to verify datums in-cycle and streams dimensional data for CpK/SPC analysis during machining.

In-Process Probing & SPC Capture

3-Axis Vertical Machining uses a vertical-spindle CNC mill with linear X-, Y-, and Z-motions to produce prismatic parts, slots, pockets, drilled holes, and 2.5-D contours. Tool changers, rigid tapping, and on-board probing enable accurate, repeatable machining of small- to mid-sized components with positional accuracy to ±0.010 mm and surface finishes to Ra ≤ 0.8 µm.

3-Axis Vertical Machining

High-Speed 3-D Profiling employs lightweight cutters, small step-overs, and spindle speeds above 15 000 rpm to machine free-form surfaces with minimal hand finishing. Advanced look-ahead controls and trochoidal toolpaths maintain constant chip load, enabling precision sculpting of mould cavities, turbine blades, and biomedical implants with surface finishes as fine as Ra 0.2 µm.

High-Speed 3-D Profiling & Surfacing

Casting / Forging Finish Machining removes residual stock from near-net cast or forged blanks, using probing to register real-world geometry before adaptive rough- and finish-cuts. This operation ensures tight dimensional tolerances, smooth sealing surfaces, and precise hole patterns while maximising material yield and minimising cycle time.

Casting / Forging Finish Machining

Finishes the perimeter of molded or printed optical lenses on a 3- or 5-axis CNC mill using diamond tools to achieve burr-free edges and tight bezel fit.

CNC Lens Edge Trimming

Conventional lathe, mill and surface‑grinder work for prototypes, fixtures or repair parts where CNC set‑up time is impractical.

Manual Machining & One-Off Tool-Room Jobs

Putnam Precision Products offers CNC Turning using state-of-the-art lathes capable of producing precision cylindrical components with tight tolerances and surface finishes to 0.8 µm Ra. Features include live tooling, Y-axis interpolation, sub-spindle part transfer, and bar-feed automation, enabling high-volume production of aerospace, medical, and automotive parts with dimensional accuracy to ±0.002 mm.

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

Straight Turning is a precise operation in CNC turning where material is removed from the exterior of a cylindrical workpiece to achieve a straight surface. It's essential for creating uniform diameters along the length of the component.

Straight Turning

Taper Turning in CNC involves cutting a conical shape into a workpiece. This operation is used to create parts that taper, typically found in shafts or fasteners, where a uniform reduction in diameter is required over the length of the part.

Taper Turning

Profile Turning is a CNC operation where complex external geometries are produced on a workpiece. It involves changing the cutting path to create various shapes like contours, arcs, and steps, crucial for customized component manufacturing.

Profile Turning

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

Facing in CNC Turning is a machining process used to produce a flat surface at the end of the workpiece. This operation involves moving the cutting tool at right angles to the axis of the workpiece, providing a smooth and finished surface.

Facing

Hard Turning in CNC Turning refers to the process of cutting materials that are hard, typically above 45 HRC, using a single point cutting tool. It is an efficient and cost-effective alternative to grinding for achieving precision dimensions and surface finishes on hard materials.

Hard Turning

Cutoff, also known as Parting, in CNC Turning is the operation where a part is cut off from the main workpiece. This process involves a deep, straight cutting operation along the workpiece to separate the part.

Cutoff (Parting)

Knurling in CNC Turning is a process of producing a regular, cross-hatched pattern on the surface of a part. This is typically done to provide a better grip on the machined part. It involves pressing a tool with the desired pattern into the rotating workpiece.

Knurling

Superimposed Machining is an advanced CNC turning technique enabling simultaneous cutting with multiple tool posts or spindles. This parallel operation dramatically reduces cycle times and increases production efficiency for complex parts.

Superimposed Machining

Live Tooling adds powered rotating tools to CNC turning centers, allowing operations like milling, drilling, or tapping on a lathe without transferring the part to a separate machine. This improves efficiency and reduces setups for complex components.

Live Tooling

Swiss Machining is a high-precision CNC machining process designed for producing small, complex parts with tight tolerances. It is typically performed on Swiss-type lathes, which utilize a sliding headstock and a guide bushing to minimize deflection and enhance precision during various machining operations, including turning, milling, and drilling. Key features include high precision and accuracy, capability for multiple operations, and minimal tool deflection. Common applications include medical devices, aerospace components, precision instruments, and electronics parts.

Swiss Machining

Screw Machining is a high-speed, precision machining process designed for the mass production of small, intricate components such as screws, bolts, and other threaded parts. Performed on automatic screw machines, it allows for multiple operations—including turning, threading, drilling, and knurling—in quick succession. This ensures efficient and accurate production of high-volume parts. Typical applications include automotive components, medical devices, electronics hardware, and various fasteners or fittings.

Screw Machining

Large-Diameter CNC Turning focuses on parts whose swing exceeds standard lathe capacity—typically 330 mm (13 in) or more. Specialized heavy-duty spindles and wide-gap beds allow accurate rough- and finish-turning of large flanges, rings, and housings while maintaining concentricity and surface finish comparable to standard CNC turning.

Large-Diameter CNC Turning

Bar-Fed CNC Turning automates production by feeding continuous bar stock (typically ≤ 50 mm / 2 in Ø) through the spindle. Coupled with sub-spindle or parts-catcher, it enables unattended, high-volume manufacture of precision turned components with minimal material waste and cycle time.

Bar-Fed CNC Turning

Cross Drilling produces radial or compound-angle holes that intersect a primary bore in shafts, hydraulic spools, crankshafts, and tubular parts. Live-tool turrets, B-axis heads, or mill-turn sub-spindles index the workpiece so the drilling tool can penetrate the sidewall, creating intersecting oil galleries, gas ports, or balancing holes without a secondary milling setup.

Cross Drilling

Precision turning of slender shafts whose length-to-diameter ratio typically exceeds 15:1. Uses between-centres support (live/dead centres, programmable steady rests) and vibration-damped tooling to maintain ≤0.05 mm TIR over metre-scale workpieces. Typical applications include power-generation rotors, down-hole drilling mandrels, aerospace actuators, and automotive drive shafts.

Long-Shaft CNC Turning

Putnam Precision Products specializes in Swiss-Type CNC Turning, processing long, slender parts on sliding-headstock lathes with gang tool posts. This process achieves true-position accuracy better than 5 µm on diameters from 0.2 to 32 mm, supporting complex, high-precision components for medical, aerospace, and electronics industries. Features include sub-spindle back-working and live multi-axis milling.

Processes long, slender parts on sliding-headstock lathes with gang tool posts, achieving < 5 µm true-position on Ø 0.2–32 mm stock.

Swiss-Type CNC Turning

CNC Swiss Turning

Putnam Precision Products offers comprehensive stamping and coining services using high-capacity presses and coining machines. Stamping shapes metal by pressing it into dies for high-volume uniform parts, while coining applies high-pressure stamping to create crisp, shallow relief features with tight tolerances and superior edge definition. These processes support fine logos, serrations, and functional textures with excellent positional accuracy.

Punching and stamping involve shaping metal by pressing it into a die. Punching creates holes or indents, while stamping forms the metal into specific shapes.

Punching and Stamping

Stamping presses metal into a die to form specific shapes and features, enabling high-volume production of uniform parts.

Stamping

Coining is a high-pressure stamping operation that plastically flows metal to create crisp, shallow relief features with minimal spring-back, achieving tight geometry and superior edge definition.

Coining

Progressive Stamping utilizes multiple stations in a single strip of metal, forming complex parts in a continuous, efficient process.

Progressive Stamping

Deep Drawn Stamping forms hollow or cylindrical parts by drawing metal into a die deeper than it is wide, yielding seamless, high-strength components.

Deep Drawn Stamping

A stamping process utilizing heated dies to transfer colored foils onto surfaces, enhancing aesthetics and providing durable printed impressions.

Hot Stamping

Stamping and Coining

Putnam Precision Products utilizes advanced laser beam welding technology for high-precision, high-speed joining of thin metals. This process is complemented by comprehensive assembly services including welding, riveting, and mechanical fastening. Assembly operations include light mechanical assembly, electromechanical integration, and precision positioning, ensuring complete, ready-to-install units with tight quality control.

Laser Beam Welding uses a focused laser to fuse materials, allowing for high-precision, high-speed welding of thin metals in automotive, aerospace, and electronics.

Laser Beam Welding (LBW)

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

Assembling

Integrates sensors, PCBs, and wiring with mechanical housings and performs basic functional tests.

Electromechanical Assembly

Installs PEM inserts, Helicoils, bushings, and similar hardware so parts ship assembly-ready.

Light Mechanical Assembly

Assembly Positioning stabilises and accurately orients large or heavy sub-assemblies during welding, bolting, riveting, or inspection. Powered tilt-rotate tables, hydropneumatic lifters, and modular zero-point fixtures let operators access all sides of the workpiece while maintaining datum alignment, reducing ergonomic risk and takt time in heavy-duty fabrication and machinery builds.

Assembly Positioning

Spring Assembly & Integration combines precision-made springs with retainers, plungers, housings, or damping elements to deliver ready-to-install mechanical sub-assemblies. Automated cells perform press-fit, staking, adhesive bonding, and functional load-deflection tests, guaranteeing each assembly meets preload, travel, and fatigue-life criteria before shipment.

Spring Assembly & Integration

Laser Welding and Assembly

Putnam Precision Products provides advanced surface finishing services including polishing, grinding, super-finishing, and micro-finishing to achieve precise surface textures and dimensional tolerances. These processes enhance bearing life, reduce friction, and prepare parts for coatings or plating. The finishing operations support aerospace, medical, and precision fluid-power components with surface roughness down to Ra 0.05 µm and dimensional tolerances to ±0.002 mm.

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

Super-finishing (Micro-finishing) removes the final microns of surface asperities using low-speed, low-pressure oscillating abrasive stones or tapes, producing a plateau finish with Ra ≤ 0.1 µm (4 µin). The process improves bearing life, reduces friction and enhances fatigue strength on shafts, hydraulic pistons, gears and raceways after grinding or hard turning.

Super-finishing / Micro-finishing

Surface Conditioning prepares surfaces for finishing (e.g. paint, coatings) or to enhance physical properties through sandblasting, buffing, chemical etching, etc. Critical for adhesion, aesthetics, or final surface texture.

Surface Conditioning

Surface Grinding employs a rotating abrasive wheel to remove material from a workpiece surface, achieving excellent precision and finish. It is commonly performed on flat or contoured surfaces for final finishing and dimensional accuracy.

Surface Grinding

Precision Flat Surface Grinding uses abrasive wheels to create exceptionally flat and smooth surfaces on a workpiece, crucial for applications requiring tight tolerances and high surface quality.

Precision Flat Surface Grinding

Surface Finishing

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

ISO 9001:2015

U.S. FDA clearance confirming that an additive used in food-contact packaging or processing equipment is safe under intended conditions of use, as demonstrated through a Food Contact Substance Notification (FCN) or applicable 21 CFR indirect additive regulation.

FDA Food Contact Substance (FCS) Clearance

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

Putnam Precision Products, Inc. manufactures precision CNC machined metal and plastic components for medical devices, including laparoscopic instruments, implants, and orthopedic tools, supporting the entire product lifecycle from prototype to full production with FDA registration and rigorous quality systems.

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

Putnam Precision Products, Inc. produces high-precision aerospace components for military and commercial applications, including parts for the Space Shuttle, M1 Tank, B1 Bomber, and U.S. submarines, adhering to strict ISO certifications and quality inspection standards for mission-critical aerospace systems.

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

Putnam Precision Products, Inc. delivers precision machining, fabrication, and assembly services for industrial equipment components, serving diverse sectors such as commercial machinery and transportation, with expertise in materials like aluminum, stainless steel, and titanium to meet demanding industrial standards.

Putnam Precision Products, Inc. specializes in diversified precision machining and assembly services, including CNC milling, turning, Swiss turning, stamping, coining, laser welding, and finishing processes such as heat treating, passivation, plating, and coating. Established in 1967, the company serves medical device, aerospace, and industrial markets with advanced manufacturing technology and quality systems. Their Brewster, NY facility is equipped with state-of-the-art equipment and staffed by skilled engineers who develop custom tooling and inspection gauges to ensure competitive pricing and superior quality. The company holds FDA registration and emphasizes process control through SPC, FMEAs, and PPAPs to meet rigorous industry standards.

Primary manufacturing facility and headquarters equipped with advanced CNC machining centers, stamping presses, and assembly cells supporting medical and industrial precision components. Located strategically in Brewster, NY with access to regional transportation networks.

Putnam Precision Products Headquarters

Specializing in precision CNC machining and assembly for medical and industrial markets since 1967.

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