SPIROL is pleased to announce the launch of its newest machined Aluminum Threaded Inserts, designed for heat or ultrasonic installation into straight plastic holes. (read more)

SPIROL Now Offers Pre-Stacked Disc Springs for Streamlined Assembly

SPIROL International Corporation is pleased to announce the availability of pre-stacked Disc Springs, designed to simplify assembly and improve production efficiency. While some applications require only a single Disc Spring, others demand multiple Discs arranged in a specific configuration to achieve preci... (read more)

SPIROL Launches Model PMH Heavy-Duty Manual Installation Machine

Danielson, CT – SPIROL International Corporation announces the introduction of the Model PMH, a highly versatile heavy-duty Manual Installation Machine designed for low- to moderate-volume production environments requiring insertion forces up to 1,500 lbs (6.7 kN).

The Model PMH efficiently... (read more)

Disc Springs are conically-shaped washers designed to be axially loaded. Since deflection of a Disc Spring at a given load is predictable, it is possible to calculate force and stress levels within the Disc. This paper focuses on the use of Disc Springs and how to estimate fatigue life in dynamic situations. (read more)

SPIROL is pleased to announce the release of several design enhancements to our Model CL Compression Limiter Installation Machine. These enhancements improve operator interaction, reduce changeover time and incorporate additional error-proofing techniques to our machine design. (read more)

SPIROL® Tubular Spacers provide a cost-effective, high-performance alternative to cut tubing, machined bushings, ferrules, grommets, and turned parts. Used as standoffs, sleeves, axles, and pins, they are engineered to deliver reliable spacing without unnecessary cost or complexity.

Formed from cold-rolled strip into closed-seam tubes, SPIROL Spacers are produced using... (read more)

Flexible solutions for post-mold insert installation in thermoplastic and thermoset plastics.

SPIROL’s Insert Installation Machines provide a proven foundation for stand-alone and integrated assembly systems, delivering reliability, precision, and flexibility across a wide range of applications.

Key Features & Options

• Vision sensing for...

SPIROL has expanded its Solid Pin line with the new Press-N-Lok™ Pin, designed to permanently and securely join two plastic components. Featuring opposing backward-angled barbs, the pin allows plastic to backfill during insertion, creating strong axial resistance and a tamper-resistant assembly.

Made from lightweight, corrosion-resistant, lead-free aluminum, the Press... (read more)

SPIROL has expanded its Compression Limiter offering with new Oval Compression Limiters designed for plastic assemblies. The CL400 Press-In and CL460 Molded-In series accommodate up to 2.25 mm of additional clearance on one axis, providing greater flexibility for centerline and stack-up tolerancing compared to round designs.

The CL400 Press-In is roll-formed from high-carbon steel... (read more)

Model HM Manual Heat Insert Driver

Designed to install virtually any type of Heat / Ultrasonic Style Insert. As much as 75% of an Insert’s performance is the direct result of how well it was installed. Therefore, in order to maximize performance, all of the factors that impact installation must be carefully controlled. SPIROL’s Model HM Manual Insert Driver has been de... (read more)

A leading forklift manufacturer turned to SPIROL after struggling with slow, injury-prone manual installation of Slotted Spring Pins. Seven pins per unit, installed by hammer, caused interlocking issues, production delays, and injuries on the assembly floor.

SPIROL delivered a smarter, safer solution.
By switching to SPIROL® Coiled Spring Pins and implementi... (read more)

There are two primary types of hinges:

1. Free-fit hinges operate with minimal friction or drag. Components rotate freely and independently with little resistance.
2. Friction-fit hinges incorporate controlled interference to prevent free rotation. Depending on design intent, the resistance may range from a slight drag to enough torque to hold the

Medical Market

SPIROL’s Engineered Fasteners and Precision Shims are used across surgical, diagnostic, and orthopedic medical devices. With deep medical-industry expertise, we provide reliable, high-quality solutions that meet strict performance and regulatory requirements.

Coiled Spring Pins and Solid Pins are widely used in surgical instrument t... (read more)

Slotted Spring Pins

SPIROL offers a complete line of Slotted Spring Pins, including:

1. SPIROL Standard Metric Slotted Pins
2. SPIROL Standard Inch Slotted Pins
3. ISO 8752 Slotted Pins

A Slotted Spring Pin is a cost-effective, general-purpose fastening solution used across countless applications. During install... (read more)

Installation Equipment Pin Installation Technology

SPIROL Pin Inserters reliably feed and install headed or straight pins, bushings, rivets, press-in inserts, and similar components. We offer standard and custom systems designed to deliver the right level of automation for your volume, complexity, and cost goals.

Capabilities:

• Manual,.../li>

Application & Fastener Engineering Services

Since 1948, SPIROL has delivered trusted application and fastener engineering support to customers worldwide. We recommend involving our team early in the design process so we can help optimize not only the fastening component, but also the critical interface between our products and your assembly.

By partnering early,... (read more)

SPIROL has released a new video highlighting the updated Model PR Semi-Automatic Pin Inserter and Model CR Heavy Duty Pin Inserter. Both machines install Coiled and Slotted Spring Pins, Solid Pins, Alignment Dowels, and Bushings, and feature a vibratory feeder bowl that automatically delivers pins—ideal for small, hard-to-handle parts.

The touch-screen interface provides mul... (read more)

SPIROL Expands CL220 Compression Limiter Line

SPIROL has expanded its CL220 Compression Limiter series with new diameter and length combinations to meet a broader range of application requirements.

Featuring a split-seam, flexible design, the CL220 accommodates wide hole tolerances and prevents interlocking in the free state. Intended for post-mo... (read more)

SPIROL Introduces New Lightweight Aluminum Compression Limiters

SPIROL has launched the Series CL6000 Aluminum Precision Machined Compression Limiters, engineered to reinforce high-stress joints in plastic assemblies. Designed to prevent plastic deformation, these Limiters absorb clamp load during bolt tightening—ensuring long-term joint strength and reliability. (read more)

SPIROL is pleased to introduce a range of 2024 aluminum Press-In Inserts. Available in symmetrical (Series INS 50) and headed (INS 51) versions, the new aluminum Press-In Inserts complements the existing brass line. Threaded Inserts are essential for reinforcing plastic components and provide a reusable thread within a bolted assembly. This ensures a proper seating torque and prev... (read more)

Compression Limiters protect plastic components of an assembly from the compressive loads generated by the tightening of bolts. More about their function. (read more)

SPIROL has recently expanded their eCommerce platform, Shop.SPIROL.com, to include their expansive Threaded Inserts for Plastics product line. (read more)

SPIROL is pleased to announce the release of their new Precision Metal Shims brochure that details the breadth of their product line, value-added services and quality certifications. SPIROL’s Shim product line includes: Specialty Shims, Thrust Washers, Laminated and Edge-Bonded Shims custom-made to customer specifications. (read more)

Easily peeled laminated shims, designed from metal or composites, make thickness adjustments easy during assembly or field repairs. (read more)

SPIROL Heat Insert Drivers and Self-Tapping Insert Drivers are designed to enable easy and repeatable set-ups, and provide greater in-process control. Preset, repeatable air pressure and temperature settings assure uniform insert installation and maximum insert performance. (read more)

SPIROL® is pleased to introduce the Model PMX Extra Heavy Duty Manual Pin Inserter. This versatile tool is ideally suited for low to moderate levels of production for assemblies that require insertion force up to 26.6 kn (6,000 lbs). Benefits include smooth operation, repeatability and durability. Download the data sheet today! (read more)

Coiled Spring Pins are shock-absorbing fastening elements that provide flexibility, uniform strength, equal stress distribution, closer diameter tolerances, no interlocking, trouble-free automatic feeding, and they reduce costs. SPIROL invented the coiled spring pin and its production technology in 1948. (read more)

Disc springs are conically-shaped, washer-type components designed to be axially loaded. What makes disc springs unique is that based on the standardized calculations of DIN EN 16984 (formerly DIN 2092), the deflection for a given load is predictable and the minimum life cycle can be determined (read more)

SPIROL Series DB100 Dowel Bushings, Series SD200 Spring Alignment Dowels, and Series GD100 Ground Hollow Dowels are used to locate components with respect to each other. For Dowel Bushings applications, the hollow design permits a fastening screw or bolt to pass through the inside diameter eliminating the need to drill a separate hole. (read more)

SPIROL® Slotted Spring Pins are used as retaining pins, axle shafts, stop pins, hinge and pivot pins, cross bars, as well as locator pins. We offer metric ISO and inch and metric ASME slotted pins. (read more)

The SPIROL Shim Division is short run, custom manufacturer of shims, thin spacers and specialty washers designed and built to your specifications. (read more)

SPIROL is pleased to announce the release of their new Solid Pin Design Guide. SPIROL recently overhauled their previous Solid Pin catalog to make it an informative design guide with many easy-to-read schematics and diagrams to support each key section. (read more)

Precision Shims are used as compensators to absorb tolerances between mating components. They significantly reduce manufacturing costs by eliminating the need for each component to be precision machined in order to achieve the proper fit and function of the total assembly. (read more)

SPIROL is pleased to introduce ArmorGalv®, a Thermal Zinc Diffusion coating, as a standard finish option for their roll-formed engineered fasteners. (read more)

SPIROL offers heat/ultrasonic, molded-in, press-in, and self-tapping inserts. Our standard inserts have been designed for a broad set of plastic applications. (read more)

SPIROL® Series 2000 High Performance Vibratory Feeders represent the leading edge of drive technology. In automated assembly lines, they offer technology to maximize the efficiency of feed systems and reduce power consumption in the feeding of fuses, tablets, packets, soft rubber parts, fragile parts, and parts that are coated or have a film on them. (read more)

SPIROL International Corporation is pleased to announce the release of a new innovative lightweight product to achieve precision alignment. SPIROL's new Series GD100 Ground Hollow Dowels are designed to be a direct replacement for Ground Solid Dowels manufactured per ISO 8734 when used in alignment applications (read more)

SPIROL is pleased to announce that they have recently launched a new, quick, easy and secure eCommerce platform: Shop.SPIROL.com. (read more)

SPIROL International Corporation is pleased to announce that 2D and 3D drawings are now available for their full range of products.

Engineers and designers can access drawings for both standard items and common specials—covering more than 100 product series in metric and inch sizes. Each drawing is offered in approximately 40 different file formats, and all sta... (read more)

SPIROL engineers evaluate every detail—materials, hole size, environment, assembly process, performance expectations, and total cost. We work closely with your team to identify the best fastening approach to meet your goals faster, more efficiently, and more economically.

You’ll receive a professional engineering report with samples, test results, performance validatio... (read more)

SPIROL is pleased to announce the expansion of its Fastener Installation Equipment line with the launch of the new Model CP Pneumatic Compression Limiter Installation Machine. Designed for versatility and efficiency, the Model CP can install a single Compression Limiter into one assembly or multiple Limiters into several assemblies—at the same or varying heights—simult... (read more)