Tapered rollers are used as rolling elements in tapered roller bearings. These bearings are selected when the bearing must provide load carrying capability in both radial and axial directions.

Tapered rollers are blanked (given their rough overall shape) using a cold-heading process. Several subsequent operations including specialized grinding produce parts with precision toleranc... (read more)

Special End Rollers have custom end configurations to meet specific application or assembly needs.

The special end configurations include flat, spherical, crowned, tapered and cone shaped. Applications for special end rollers are quite varied and include the industrial, automotive and aerospace industries.

Size Ranges

• Diameter: .031″ to 1.000&P...

Hartford Technologies can design and manufacture cage bearings for your application in materials ranging from stamped steel to molded engineered plastics.

We have a substantial base of experience with manufacturing custom cage bearings for high speed, sliding/rolling applications. Sliding applications include seat tracks, actuators, and drawer slides.

Hartford Technologies... (read more)

Hartford Technologies offers an extensive array of custom precision rollers for applications where tight tolerances or custom shapes are required.

One of Hartford Technologies’ strengths is unique cold-heading technology for the manufacturing of custom precision rollers without costly secondary operations. In high-volume applications, this produces significant cost sa... (read more)

Pin is slightly larger than the application’s envelope hole. Considerable force required in assembly process. Used as a permanent method of fixture and not meant to be removed.

Standard Materials

Bearing Grade Chrome Steel
300 Series Stainless Steels, Including: 302 / 303 / 304 / 18-8 / 316
400 Series Stainless Steels, Including: 416 / 420 / 440 / 440C

A (read more)

Very little friction when inserted into application envelope. Loose fitting that can be assembled by hand and removed if necessary. Slight wobble may be experienced between joining parts. Parts should be able to turn and move freely within application.

Standard Materials

Bearing Grade Chrome Steel
300 Series Stainless Steels, Including: 302 / 303 / 304 / 18-8 / 316
... (read more)

Precision balls are used most notably in the health and beauty or pharmaceutical industries, in control-flow applicators for applying lotions, creams or perfumes. Hartford Technologies manufacturers polypropylene (PP), high density polyethylene (HDPE) plastic, or glass balls that are inert to most health and beauty solutions or creams.

Overview of Roll-on Applications

These... (read more)

A detent is a mechanical device that prevents motion until it has been released.

Another name for a detent pin is a quick release pin. These pins are often used in alignment / fastening / joining applications.

Overview of Detent Pins

Precision balls are used as part of a detent pin assembly, which mainly consists of a pin, a ball and a spring. The spring-loaded ball... (read more)

Plastic Balls We manufacture industrial plastic balls for various applications and consumer products, including polypropylene balls, teflon balls, and nylon balls.

Low-load applications and flow control devices use industrial plastic balls. Colored plastic balls are used for identification purposes in many medical applications. Also, plastic balls offer excellent fatigue and corr... (read more)

Hartford remains committed to responsible manufacturing as evidenced by our ISO 9001 and 14001 certifications and expert engineers.

Overview of Quick Disconnect Fittings

Quick disconnect fittings are used to provide fast and easy connection and disconnection of fluid or air lines. These fittings are also known as quick connects or quick release couplings. They are used to r... (read more)

Precision balls are widely used to permanently plug holes in manufactured parts where holes have to be drilled in the workpiece to create flow channels. The ball can be from a variety of materials which are referenced below. The ball is press-fit in the hole such that it creates a permanent seal. Typically the balls are Grade 50 or better as the consistency of the diameter and roundness... (read more)

Hartford Technologies can provide simple modifications to some of our standard balls.
Overview of Modified / Drilled Balls

Modified/drilled balls come in all sizes and materials. Typical modifications include a drilled thru-hole, threaded thru-hole, flat, or slot. Modified/drilled balls are used in valve or flow control applications, as well as other industrial... (read more)

The methodical cleaning and sterilization processes that medical ball bearings undergo are testaments to the critical nature of cleanliness in medical applications. These processes are not just about adhering to regulations but are fundamental to ensuring patient safety and the successful outcome of medical procedures. (read more)

Precision balls are used in containers that meter or dispense products such as: airless spray pumps, lotion pumps, atomizers, or continuous or metered aerosol cans. Hartford produces stainless steel balls that are specified for dispensing applications within the health care, cosmetics/fragrances, and household products industries. Hartford also produces balls for specialty applica... (read more)

Hartford Technologies has a Small Ball Pack Program for distributors of fasteners and related products. The Hartford Ball Pack Program is an excellent product line for fastener distributors who want to expand their product offerings.

OEM customers routinely use ball packs for engineering development purposes; MRO (maintenance / repair / operations) need them for routine equ... (read more)

Profile

There are no known industrial acids or caustics that will attack Teflon, and there is no known solvent for it.

Application

Teflon balls are recommended for applications where lightweight, non-metallic, and erosion-resistant properties are required. Teflon balls have a maximum work temperature of 550°F.

Hardness

R58

Tensile Strength

Hartford custom-manufactures precision pins and shafts to your specifications, with length and diameter tolerances depending upon the size and end configuration.

Crowned, rounded spherical, and chamfered ends (including chamfer on both ends) are available. All precision shafts and pins materials are through-hardened, except carbon steel.

Size Ranges

...

Pivot pins refer to pins that have a special end configuration (e.g spherical end) that allows this feature to be used as a cam profile, such as a detent pin.

A detent pin refers to pins that have a mechanical feature that prevents motion until this feature is released. One simple example is a pin that has a spring-loaded ball pressed into a hole along its length. The pin c... (read more)

Hartford Technologies custom manufactures precision knurled pins and knurled studs that provide the highest levels of straightness, roundness, and hardness, without marks. (read more)

We manufacture colored plastic balls in any custom color. In addition, natural (off-white) is the standard color. At Hartford, we can custom-match whatever color you need for your specific application.

Hartford Technologies produces colored plastic balls in Polypropylene (PP), Polyethylene (PE), Teflon (PTFE), Nylon (PA), and Acetal (POM). Furthermore, engineered plastics such as... (read more)

Profile

Polypropylene balls have excellent chemical resistance and low density, as well as the highest melting point of the volume thermoplastics.

They are excellent electrical insulators, with low dielectric constant and loss factors. Polypropylene balls are highly resistant to acids, alkalis, alcohols, and many inorganic chemicals, and are non-toxic.

... (read more)

Profile

Acetal balls offer predictable mechanical, chemical, and electrical properties over a broad temperature range for extended periods. They exhibit good fatigue resistance, impact resistance, tensile and shear strength, and dimensional stability. They have very low moisture absorption characteristics. Delrin balls maintain a natural lubricity, giving them a low coeffic... (read more)

Hartford Technologies is the industry leader in the design and manufacture of precision balls for valves.

Our goal is to partner with you to identify the best possible alternatives for your next valve project:
Check – Hydraulic Cartridge – Hydraulic Shuttle

High and Low-Pressure Relief – Flow Control – Pneumatic

. (read more)

Profile

Polyethylene balls are a low-cost thermoplastic alternative, providing excellent abrasion resistance and high-impact characteristics.

Polyethylene balls are also used to reduce unpleasant odors. The smooth surface of polyethylene balls prevents chemicals from depositing on their surface

Applications

Polyethylene balls are used in many pha... (read more)

Nylon balls are an environmentally friendly choice due to how they are made and that they are reusable.

Profile

Nylon balls are insoluble in diluted mineral acids most organic acids, and common solvents. They are exceptionally resistant to alkalis, petroleum oil, and greases at temperatures up to 300°F. Acids such as lactic acid, photographic soluti... (read more)

From plastic to steel, Hartford Technologies has the resources to engineer, prototype, and manufacture custom roller bearings for your application.

We have a broad base of experience with roller bearings for high-speed applications, and traditional sliding applications such as seat tracks and actuators, and drawer slides.

Hartford Technologies is a preferred manufact... (read more)

Precision Glass Balls are particularly effective in applications where corrosion resistance is a primary requirement and where extreme thermal changes are not a factor.

Like 300-series stainless, glass resists corrosion and chemical absorption, and it is non-magnetic. Glass balls are ideal for valve applications in medical devices, instrumentation gauges, pumps, water treatment be... (read more)

Special bearings, a Hartford Technologies mainstay for more than 80 years, are engineered to excel in applications that involve several factors.

These include:

• Running extremes in load, speed, oscillation, or vibration
• Demand for low-noise operation
• Low friction coefficient
• Exposure to contaminants
• Physical enve...

VIEW SIZES, GRADES, AND TOLERANCE

Profile

High hardness and dimensional stability make tungsten carbide balls the preferred choice for precision hydraulic valves, high-load bearings, inertial navigation systems, ball screws, linear bearings in slideways, gauging and checking instruments, and meters. Tungsten carbide balls are also used for ballizing, to work harden,... (read more)

Hartford Technologies offers economical carbon steel balls, case-hardened to Rockwell C 60 minimum and available in ABMA grades 100 through 1000, providing reliable performance for various applications including anti-friction bearings, steering columns, casters, roller skates, toys, and drawer slides. (read more)

Hartford Technologies is a leading manufacturer of custom bearing assemblies.

We specialize in the development of engineered bearings and custom bearing assemblies. Advanced materials expertise, design capabilities, and quality processes enable our team to produce engineered bearings that perform at high temperatures, speeds, and loads, as well as in less challenging environments.

Hartford Technologies, Inc. offers a range of detent pins in various sizes and materials, along with services for custom bearing assemblies, precision balls, and other components, serving multiple industries. (read more)

Hartford Technologies provides custom dowel pins in a variety of sizes and materials, designed to fit unique customer requirements for various industries. (read more)

Explore AISI 420 stainless steel balls at Hartford Technologies, renowned for their superior hardness, wear resistance, and corrosion resilience suitable for diverse applications. (read more)

Learn more about our AISI 316 stainless steel balls, from exceptional corrosion resistance, versatility in applications, and FDA-approved medical-grade materials. (read more)

Explore AISI 304/302 stainless steel balls (Type 18-8) with exceptional corrosion resistance and versatile applications, from couplings to valves, available in various sizes from 1.5mm to 50.8mm. (read more)

Bearings enable smooth, low friction motion. In a perfect world they'd all be super light, extremely compact, maintenance-free, quiet and durable. In other words, perfectly optimized for automotive applications. Unfortunately the world isn't perfect, but high performance bearings can come close. Here's some guidance on their use for those in automotive manufacturing. (read more)

With continuous innovations in automation, precision, advanced materials, and sustainable practices, the future of CNC Swiss machining looks extremely promising. This is expected to lead to significant growth in the industry over the next decade. (read more)

Medical grade balls have a variety of medical applications. This includes surgical instruments, drug delivery systems, and implantable devices.

These balls must meet stringent quality standards. After all, they must ensure patient safety and regulatory compliance. That’s why it's important to choose a reliable and reputable manufacturer. (read more)

Hartford Technologies is a leading manufacturer specializing in custom precision pins. (read more)

Applications:

• Tumbling media
• Spray can agitation
• Ball bearings
• Drawer slides
• Writing instruments
• Locking mechanisms

Hartford Technologies has been a preferred supplier of needle bearing retainers to leading OEMs and Tier 1s, for both standard and custom products. (read more)

Brass balls are used in electrical devices, petrochemical industry operations, and consumer products such as appliances. (read more)