End-to-end production of engineered coil and formed springs, combining CNC coiling, end finishing, heat treatment and fatigue testing to deliver consistent compression, extension, torsion and specialty springs. Focuses on repeatable rates, cycle-life performance and material control for medical, automotive and industrial applications, leveraging in-house stress relief, grinding, shot-peening and assembly to meet tight functional tolerances.

Custom springs and wire forms are fabricated from round, square and rectangular wire into compression, extension and torsion springs as well as complex formed assemblies. Processes include CNC coiling, spring grinding and secondary heat treatment for consistent performance.

Custom Springs & Wire Forms

Spring Wire Forming covers end-to-end production of compression, extension, torsion, and specialty springs. It integrates CNC coiling, end finishing, heat treatment, and quality assurance to deliver high-performance springs for automotive, aerospace, medical, and industrial applications.

Spring Wire Forming

CNC Spring Coiling forms wire into helical coils using multi-axis, servo-controlled coilers with real-time diameter and pitch feedback for tight tolerances.

CNC Spring Coiling

Spring End Grinding flattens compression-spring ends with opposed abrasive wheels, producing square, parallel bearing surfaces for uniform load transfer.

Spring End Grinding

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

Custom Springs & Wire Forms (Helical Springs)

Fourslide stamping and flat-blank forming for complex metal stampings, flat springs and wire-derived components. Uses in-house tool design and fourslide presses to produce intricate forms without expensive progressive dies, minimising material waste and enabling economical runs of shaped spring contacts, clips and flat spring parts across a range of strip materials.

Fourslide Stamping uses four tool slides from different angles to form intricate shapes, enabling complex parts without the need for multiple dies.

Fourslide Stamping

Metal stampings and formed components are made by blanking, bending and drawing sheet or coil stock. Products include brackets, clips, enclosures, chassis panels and precision spring contacts manufactured in high-volume presses.

Metal Stampings & Formed Components

Progressive-die and fourslide stamping of flat or leaf micro-springs from strip ≤ 0.1 mm thick, incorporating high-speed vision punch-position correction to maintain ±0.010 mm feature accuracy.

Micro Spring Stamping

Fourslide & Custom Stampings

In-house tooling design and toolroom fabrication supporting coilers, fourslide dies and inspection nests. Services include prototype tooling, manual machining, fixture design and short-run tool builds to enable fast changeovers, reduced lead times and ongoing die maintenance for long-life production and iterative product development.

Design and analysis of jigs, nests and cutting tools using FEA and simulation to ensure repeatability and interchangeability.

Production Tooling & Fixture Design

Manual Machining & One-Off Tool-Room Jobs involve conventional machining using manual lathes, mills, and surface grinders for low-volume, prototype, maintenance, or fixture fabrication tasks. This operation is ideal where CNC programming and setup time would be inefficient. It relies on skilled machinists capable of executing tight-tolerance work through hands-on precision methods, including hand-scraping and manual fitting.

Manual Machining & One-Off Tool-Room Jobs

Rapid design, manufacture, and validation of prototype coiling arbors, strip-forming dies, swaging mandrels, and inspection nests tailored to spring geometries not yet in production. Combines CAD/FEA, micro-EDM, laser powder-bed fusion, and micro-milling to deliver ready-to-run tooling in ≤3 working days.

Prototype Tooling Design & Build

Tooling Design & In-House Tool Room

Engineering, rapid prototyping and DFM specifically for spring and wireform components. Provides concept validation, FEA/Goodman fatigue analysis, prototype coiling and iterative sample kits to optimise rate, life and integration before production tooling, accelerating development cycles and reducing launch risk for regulated and high-cycle applications.

Rapid Spring Prototyping & Design Engineering provides concept-to-part solutions in as little as 48 hours. Engineers apply EN 13906-2 calculations, finite-element fatigue analysis, and proprietary coil simulation to optimise load, rate, and life. Quick-change CNC coilers produce prototype lots, validated with digital load-testers and detailed data reports.

Rapid Spring Prototyping & Design Engineering

Prototyping is the creation of preliminary parts or models that simulate the form, fit, and function of a product prior to mass production. It is used to validate design intent, test material performance, assess manufacturability, and gather stakeholder feedback. Prototyping methods include subtractive (e.g., CNC machining), additive (e.g., 3D printing), and formative (e.g., soft tooling or urethane casting) approaches depending on the functional and aesthetic requirements of the part.

Prototyping

Rapid, multidisciplinary build of functional prototypes that bridge industrial design and engineering validation. Combines additive manufacturing, CNC machining, soft tooling, electronics integration, and functional testing in tight sprint cycles to prove form-fit-function and gather user feedback before production tooling.

Prototype Development (Concept-to-Function)

Batch manufacture and kitting of 3–10 spring design variants (e.g., pitch, wire Ø, free length) to enable rapid bench-top evaluation. Each kit ships with labeled cavities, dimensional certs, and summary load-deflection charts for side-by-side comparison.

Multiple-Variation Spring Prototype Kits

Engineering, Prototyping & DFM

Quality assurance and inspection services anchored by ISO 9001:2015, SPC and PPAP capabilities. Offers incoming, in-process and final inspection, dimensional metrology and documentation packages (PPAP/FAI), plus load/fatigue testing for springs to ensure traceability, process capability and compliance with demanding automotive, medical and defense specifications.

Inspection & Quality Control (IQC) comprises the metrology, verification, and documentation activities that ensure parts conform to drawing/CAD requirements, customer specifications, and regulatory standards. IQC spans incoming, in-process, and final inspection and leverages coordinate metrology (CMMs and portable arms), laser/structured-light scanning, optical comparators and vision systems, surface-form metrology (profilometers, roundness/contour testers), nondestructive testing (NDT), and statistical process control (SPC). Results are captured in traceable reports (e.g., AS9102 FAIR, PPAP) tied to calibrated gauges and controlled environmental conditions.

Inspection & Quality Control

Preparation and submission of Production Part Approval Process packages (Levels 1-5) including control plans, FMEAs, dimensional results, material certs and capability studies to satisfy IATF 16949 requirements.

PPAP Documentation & Submission

Real-time Cp/Cpk monitoring with automated data collection and X̄-R charting to ISO 22514.

Statistical Process Control (SPC)

Mechanical verification of prototype and pre-production springs using servo load frames and rotary fatigue rigs to characterise force–deflection curves, spring rate, relaxation, and high-cycle endurance up to 10⁸ cycles under temperature-controlled conditions.

Spring Load / Deflection & Fatigue Testing

Quality Assurance & Inspection

Secondary operations and value-added services that complete production-ready spring and stamped parts. Includes finishing and surface treatments, plating, tumbling, shot-peening, stress-relief, special packaging/kitting, kanban/EDI support and light assembly—reducing supply-chain steps and delivering parts ready for installation or direct use.

Secondary operations & value-added services encompass in-line or post-process tasks—deburring, tapping, assembly, labeling, special cleaning or final customization—that manufacturers perform in-house but typically do not sell as stand-alone services. This catch-all pillar groups low-visibility steps so buyers understand a supplier’s complete in-house capabilities without cluttering the primary taxonomy.

Secondary Operations & Value-Added Services

Tumbling is a post-processing method used to smooth and polish the surfaces of parts. It involves placing parts in a tumbler with abrasive media, which, when rotated, creates friction that removes rough edges and smoothens surfaces. This process is widely used for bulk finishing of small components in industries such as automotive, aerospace, and consumer goods, improving both the aesthetic appeal and functional quality of the parts.

Tumbling

Packaging / Kitting is a value-added service involving the sorting, assembly, and packaging of individual components into organized kits or finished sets. This service streamlines downstream operations such as final assembly, inventory management, and logistics by ensuring that all required items are grouped, labeled, and packed for efficient delivery and use. Typical use cases include service kits, BOM-based assembly packs, and retail-ready bundles.

Packaging / Kitting

Applies controlled shot streams (cast steel, ceramic, or glass beads) to induce compressive surface stresses in coil and flat springs, improving fatigue life by up to 300 %. Process parameters follow AMS 2430/2431.

Spring Shot Peening

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

ISO 9001:2015

Evidence that an organization follows the AIAG Production Part Approval Process, ensuring that new or revised automotive parts and their associated production processes meet all customer engineering design and specification requirements before volume production begins.

Production Part Approval Process (PPAP) 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

Tollman Spring Company supplies a broad range of springs, wire forms and fourslide stampings for commercial and general-manufacturing uses—components for timers, valves, windows, security systems and other industrial/commercial product 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

Tollman Spring Company manufactures compression, extension, torsion and power springs plus fourslide metal stampings used as retaining, latching and actuation components in automotive systems such as door locks, ignition assemblies, fuel-system valves and brake hardware.

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

Tollman Spring Company produces precision compression, constant-force and power springs and small metal stampings for medical-device applications, including wearable medical devices, single-use applicators, syringe components and diagnostic test mechanisms.

Involves the fabrication and assembly of electronic components, semiconductor devices, printed circuit boards, and advanced microelectronics, as well as the manufacture of supporting mechanical components such as casings, enclosures, and structural parts. Cleanroom processes, ESD controls, precision machining, and adherence to industry standards (e.g., IPC, JEDEC) are critical for achieving high-density, high-performance products in mass-market, specialized, and ancillary applications.

Electronics & Semiconductors

Tollman Spring Company supplies finely formed springs, battery contacts, switch springs and custom wireforms that serve as electrical contacts, display mechanics and switch-actuation components in consumer and industrial electronics.

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

Tollman Spring Company provides springs, wire forms and precision stampings for defense and firearms applications, delivering reliable actuation, retention and triggering components used by defense OEMs and firearms manufacturers.

Standard and custom bolts, screws, studs, rivets, hinges, latches, knobs, and other general-purpose hardware produced by cold heading, precision machining, stamping, or molding for use in machinery, enclosures, and factory assemblies across multiple industries. Products conform to DIN / ANSI / ISO mechanical classes, corrosion-resistance grades, and high-volume statistical-process-control requirements that support lean, repeatable, and safety-critical manufacturing.

Industrial Hardware & Fasteners

Tollman Spring Company fabricates custom industrial hardware—springs, stamped clips, pins and wireforms—used as fasteners, latches and spring-retention elements for hardware and mechanical 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

Tollman Spring Company produces engineered spring and wireform components and fourslide stampings that are integrated into machines and tools for motion control, timing, vibration damping and mechanical actuation in industrial equipment.

Tollman Spring Company, founded in 1945 and ISO 9001:2015 registered, is a U.S.-based manufacturer of precision springs, wire forms and four-slide metal stampings. Operating from a modern headquarters in Bristol, CT, Tollman offers spring engineering, prototype support, in-house tool room capabilities, SPC-driven quality control and PPAP documentation for OEMs across automotive, defense, medical, electronics, hardware and industrial markets. Value-added services include plating, tumbling, shot peening, stress relieving, hardening ovens, EDI/Kanban and climate-controlled warehousing for JIT delivery.

Headquarters and primary manufacturing site housing Tollman’s engineering, tool room, four-slide stamping equipment, CNC wire forming, finishing operations and a climate-controlled 25,000 sq ft warehouse. The location supports JIT/Kanban programs, EDI, PPAP submission and SPC-based quality controls, giving customers consolidated production, finishing and warehousing to reduce lead-time and simplify logistics for regional and national OEM supply chains.

Tollman Spring Company Headquarters

ISO 9001:2015 spring, wireform and four-slide stamping manufacturer serving automotive, medical, defense and electronics OEMs from Bristol, CT.

Tollman Spring

Precision Springs Wireforms & Stampings

Custom Springs & Wire Forms (Helical Springs)

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