Connecticut Spring & Stamping - Close-Tolerance Precision Parts: Springs, Metal Stampings and Sub-Assemblies

Headquartered in Farmington, CT, Connecticut Spring & Stamping (CSS) is a manufacturer of all varieties of close-tolerance precision parts, including springs, metal stampings and sub-assemblies, for international OEMs in medical, aerospace, firearms and defense industries worldwide.

In business since 1939, CSS prides itself on design and engineering involvement that starts with product development, and moves through prototyping, manufacturing, and assembly to warehousing and point of use. CSS has warehousing facilities in Puerto Rico and Singapore that allow our customers to build products with just in time (JIT) inventory.

Design, prototype and assembly of precision medical parts

Connecticut Spring & Stamping's 150,000ft² facility in Farmington, Connecticut, is the hub of all manufacturing and assembly projects. Our team of mechanical engineering experts is available to design, prototype and assemble all precision part needs. CSS is ISO 9001 and AS 9100 certified.

Tight tolerance springs

CSS manufactures tight tolerance springs, which are used in minimally invasive handheld surgical devices. CSS offers spring prototyping and complete new product development services. Low volume, short-run manufacturing is available, as well as high-volume production and warehousing. Springs are manufactured in a wide range of flat stock and wires and are produced according to customer specifications. Wire diameters range in size from .002in to .350in.

Metal stampings for medical devices

CSS's metal stamping expertise in the medical device arena includes prototyping and high-speed progressive die stamping from 30t-300t, in-die tapping, post machining of stampings, reel-to-reel processes, modular die options and short run stamping. The company has supplied stampings for handheld surgical devices, endoscopic clip appliers, surgical jaws, suturing devices and staple removers. Drive channels, jaws, drive and retraction springs, surgical staples and titanium clips are some of the components produced for these assemblies.

Personalised service for medical precision part manufacture

No matter what the medical device project, CSS begins each by establishing excellent lines of communication to get an in-depth understanding of a customer's design, objectives, and material requirements. CSS experts evaluate part dimension tolerance, recognizing that some tight tolerances may add significant cost, and may not be critical, while others may be achievable at no additional cost. Understanding the key dimensions and the most critical part tolerances is extremely valuable to both parties when developing the final part print. 

Prototyping for medical springs and stampings

CSS uses the prototyping process to identify ways to reduce costs and make the part manufacturable at the production phase in as short a time frame as possible. Prototypes vary tremendously depending upon the project, and CSS can produce everything from a one-piece prototype up to 10,000 pieces, for those parts where repeatability is a must.

CSS engineers use prototyping to initiate a dialogue on how to steer the project in ways that ensure manufacturing consistency and reduce cost. Engineers may call out areas where they have concerns, point out exceptions, or look at dimension and features that can be made without exorbitant tooling or added secondary operations.

In those instances where the designed part does not meet a particular need, CSS engineers use the prototyping process to request a material change or redesign the part to increase its strength. Or, if a material is called for that is not available without making an inordinately high material purchase, engineers may suggest a material change.

Specific medical parts applications include:

• Instruments - handheld surgical devices, surgical staples, staple removers
• Monitoring devices - battery contacts (flat stock or coiled wire)
• Endoscopy - channels, clip appliers, suturing devices, spring clips, hemoclips
• Drug delivery systems - syringes, inhalers, nebulizers, auto-injectors
• Electrosurgery - probe plus, hook tips
• Pulse oximetry - finger sensors
• Orthopedic - hinge plates