BelleFlex® Technologies
A Trusted, Industry Leader in the Design, Production and Service of Custom Belleville Washers and Disc Springs BelleFlex® Technologies produces Belleville washers and Belleville disc springs compliant to DIN specifications 2092, 2093, and 6796 as well as custom applications at … →
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Company
At BelleFlex® Technologies, we are committed to customer satisfaction.
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Products
At BelleFlex®, every Belleville washer and Belleville disc spring we manufacture meets or exceeds customer specifications, even for the most demanding applications. In both mass production and custom design, we employ the standard calculations of DIN 2092 to create a … →
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Flange Bolting
Help eliminate flange leakage with BelleFlex® Belleville washers for flange bolting. Leaks occur from bolt stretch, gasket creep, cycles of thermal change, etc. However, by maintaining load on bolted joints, leakage is greatly reduced, if not eliminated. H13 Tool Steel … →
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H13 Flange Bolting
H13 Tool Steel is a versatile, chromium-molybdenum alloy. Its characteristics include high toughness, resistance to thermal fatigue cracking, hardenability, and wear resistance. Help eliminate flange leakage with BelleFlex® flange bolting. Leaks occur by bolt stretch, gasket creep, cycles of thermal … →
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17-4 PH® Flange Bolting
17-4 PH® Stainless Steel is a martensitic precipitation-hardening stainless steel, with high strength and hardness, resistance to corrosion, and excellent mechanical properties. It is the most widely used of all the precipitation-hardening stainless steels. (Registered trademark of AK Steel) Help … →
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17-7 PH® Flange Bolting
17-7PH® Stainless Steel is a semi-austenitic precipitation-hardening stainless steel, well-suited for applications requiring high strength and hardness, good fatigue properties, corrosion resistance, and minimum distortion upon heat treatment. 17-7 PH® Stainless Steel, when stressed and exposed to corrosive environments, may … →
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Cryogenic 17-4 PH® Flange Bolting
With large temperature differences seen in cryogenic applications, the use of Belleville disc springs can play a significant role in the reduction of leaks. Materials with good cryogenic properties are PH (precipitation hardening) and Carpenter Technology stainless steels. The load … →
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Cryogenic 17-7 PH® Flange Bolting
With large temperature differences seen in cryogenic applications, the use of Belleville disc springs can play a significant role in the reduction of leaks. Materials with good cryogenic properties are PH (precipitation hardening) and Carpenter Technology stainless steels. The load … →
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Cryogenic Carpenter 455® Flange Bolting
With large temperature differences seen in cryogenic applications, the use of Belleville disc springs can play a significant role in the reduction of leaks. Materials with good cryogenic properties are PH (precipitation hardening) and Carpenter Technology stainless steels. The load … →
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INCONEL® 718 Flange Bolting
INCONEL® encompasses a family of nickel-chromium alloys including INCONEL® 718. These alloys have high strength, weldability, and corrosion resistance at extreme temperature ranges. Temperatures for various applications can range from -400°F to 1300°F, depending on the alloy. (Registered trademark of … →
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INCONEL® X-750 Flange Bolting
INCONEL® encompasses a family of nickel-chromium alloys including INCONEL® X-750. These alloys have high strength, weldability, and corrosion resistance at extreme temperature ranges. Temperatures for various applications can range from -400°F to 1200°F. (Registered trademark of the Special Metals Corporation) … →
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Light Duty 17-4 PH® Flange Bolting
Light duty is an economical version of stainless steel flange bolting, suitable for applications in which protection from corrosion is required. The load values listed in the table below are according to the calculated theoretical load curve based on the … →
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Light Duty 17-7 PH® Flange Bolting
Light duty is an economical version of stainless steel flange bolting, suitable for applications in which protection from corrosion is required. The load values listed in the table below are according to the calculated theoretical load curve based on the … →
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Light Duty Carpenter 455® Flange Bolting
Light duty is an economical version of stainless steel flange bolting, suitable for applications in which protection from corrosion is required. The load values listed in the table below are according to the calculated theoretical load curve based on the … →
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Inch Series Bolt Washers
BelleFlex® bolt washers maintain tension in bolted assemblies. They compensate for a variety of environmental conditions, such as thermal expansion and contraction. This group of disc springs should not be used for dynamic or precise load applications without analyzing stress … →
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Metric Fastener Series Belleville Washers (DIN 6796)
Bolted joints will work loose due to a loss of preload. This can be caused by permanent set in any part of the assembly. Belleville washers will counteract this loosening by increasing the axial compliance of the joint. The load … →
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Metric Series Belleville Disc Springs (DIN 2092/2093)
If you are looking for a Belleville disc spring for a dynamic application, you have come to the right place. These disc springs are manufactured to DIN 2092 standards. When forces and deflections are critical, or when large numbers of … →
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Ball Bearing Disc Springs
Using Belleville disc springs to preload radial ball bearings helps to maintain positioning accuracy, eliminate shaft end play, and minimize vibration by distributing the load evenly around the bearing race. The bore holes of this series of spring are designed, … →
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BelleFlex® CorePlate
BelleFlex® Technologies has recently expanded into the advanced composites market with the creation of PulFlex® Technologies – a venture that focuses on specialty applications like high strength-to-weight ratio composite materials, hybrid resin systems, and custom woven and stitched material solutions. … →
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BelleFlex® DeHydrex Oil Dehydrator
Drive through your next oil change… The BelleFlex® DeHydrex can increase the life of your diesel, gasoline, or compressed natural gas (CNG) engine by removing water and contaminants from your oil WHILE YOU DRIVE to protect your engine from: Rust and corrosion Water … →
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Custom Products
BelleFlex® combines the convenience of a large selection of in-stock and custom Belleville washers and Belleville disc springs with extensive job shop capabilities to offer our customers a one-stop source for any Belleville application. At our 90,000 square foot facility … →
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Markets
Our Bellevilles, properly installed, promote long life for your equipment under the most difficult and challenging circumstances. Our team at BelleFlex® has decades of experience in designing and manufacturing Belleville solutions for markets worldwide and in outer space – our … →
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Downhole Drilling
Downhole drilling can reach extreme depths, and the heat and vibration involved in downhole drilling pose special challenges for equipment. Reliability can be paramount in this application as downhole drilling often occurs on offshore platforms where access to parts and … →
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Pumps & Valves
Our engineers at BelleFlex® are experienced with Belleville applications for pumps, valves, and emission leakage control systems. Our flange bolting is used regularly in pumps and valves to help eliminate flange leakage caused by bolt stretch, gasket creep, and cycles … →
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Energy
BelleFlex® Belleville disc springs are used in the production and distribution of energy. They are essential to wind turbine brake assemblies, bus bars, motors, transformers, wind mill propellers, and power plants. Used singly or stacked, as is common practice for … →
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Oil Refining
Belleville disc springs are found in many components used in oil refining, such as pipelines, pipe supports, pumps, valves, and actuators. Properly designed and installed, BelleFlex® flange bolting can reduce flange leakage in pipelines, and increase the life of gasketed … →
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Transportation
For the high stress requirements of automotive, locomotive, trucking, and heavy equipment components, BelleFlex® ball bearing disc springs are an excellent choice. Bellevilles are widely used in hydraulics, brake assemblies, train trucks, clutches, and transmissions, among other components. Some applications … →
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Medical
Belleville disc springs are commonly used in clamping systems, oxygen valves, robotics, and magnetic resonance imaging (MRI). When reliability and precision are top priority, BelleFlex® can deliver to the highest standards. With more than 20 years of engineering experience, the … →
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Info & Resources
Helpful resources and information that you can use while researching Bellevilles and our complete line of BelleFlex® Custom Products.
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Tech Tips
The following BelleFlex® “Tech Tips” and “Belleville 101” topics address the most frequently asked questions by our customers about Belleville disc springs and their applications. While these Tech Tips have been provided for your ease and convenience, we encourage you … →
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Belleville 101: What is a Belleville Washer or Disc Spring?
BelleFlex® TechTips What is a Belleville Washer or Disc Spring? The Basics Flat Washers Spring Rate and Stacking Understanding Load, Stress, and Fatigue Life Belleville Spring Specifications Presetting The Basics A Belleville washer or disc spring is a conical-shaped spring … →
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Belleville 101: Why do joints leak, move, or fail?
BelleFlex® TechTips Why do joints leak, move, or fail? Deflection Preload Flat Load Deflection A bolted joint stretches in response to a given load. Over time, this can cause the bolt to loosen. Deflection is the motion that … →
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What is the difference between Belleville springs and coiled springs?
A Belleville disc spring is a conical-shaped spring shaped like a washer. Compared to a coiled spring, a Belleville spring is much smaller and can bear a much larger load relative to its deflection rate. Knowing which type of spring … →
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What is the spring rate?
The spring rate is the amount of force associated with the deflection of a spring measured in lb/in or N/mm. Every spring has its own spring rate, depending on its geometry and material. The formula to determine the load at … →
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What is the relationship between torque and flat load?
Torque is the rotational force applied to a bolt to tighten a Belleville disc spring. Flat load is the amount of axial force required to flatten a Belleville disc spring. Flat loading a Belleville disc spring helps to ensure that … →
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What is the load/deflection relationship of a Belleville disc spring?
Like all springs, a Belleville disc spring will deflect in response to a load. Belleville disc springs exhibit low deflections relative to high loads. The relationship between the load and deflection is non-linear, particularly as load increases. This quality makes … →
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What is the purpose of stacking Belleville disc springs?
Stacking Belleville disc springs allows for precise customization of the load and/or deflection of the springs. Stacking in parallel (same direction) will increase load. Stacking in series (opposite directions) will increase deflection. Belleville disc springs can also be stacked as … →
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Why are flat washers sometimes used with Belleville disc springs?
Belleville disc springs help preserve bolt integrity, particularly in areas that must bear a heavy load. In some instances, the addition of a flat washer increases the effectiveness of a Belleville disc spring by helping to spread the load. In … →
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Why does a bolt loosen?
From the moment it is preloaded, a bolt almost always loosens. Several factors inherent to industrial processes can cause bolts to loosen: changes in temperature, vibration, relaxation of bolts, over-tightening and under-tightening, to name a few. In applications with extreme … →
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What are load and deflection in a joint?
A bolted joint stretches in response to a given load. Over time, this can cause the bolt to loosen. Deflection is the motion that occurs in response to the application or removal of a load or a stress. It is … →
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What is preload, and how much should be applied?
“Preload” is the amount of tension in a bolt or joint when it is first tightened. To ensure the integrity of the joint during operation, the amount of preload must exceed the expected external load that will be applied to … →
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What is differential thermal expansion?
Industrial materials can expand when heated. Often, different materials expand at different rates, a condition known as differential thermal expansion. Differential thermal expansion can cause problems in applications. If two or more parts of an industrial component are made of … →
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What is live loading?
“Live loading” is a method of using Belleville disc springs to preserve preload in valves. A Belleville disc spring is added to the gland follower of a packed valve to create a controlled, sustainable amount of stress in the packing … →
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What is presetting?
Presetting takes place during the manufacturing process of a Belleville disc spring when it is momentarily flattened. The process reduces the original unloaded height of the spring, as a result of the residual tensile stresses. Preset Belleville disc springs, typically, … →
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How do you determine working temperatures?
Every metal has a “working temperature” range, or the maximum and minimum temperatures at which it will continue to function in the working environment. Some metals are designed, specifically, to withstand very high or very low temperatures. Others are intended … →
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What does it mean to calculate load and stress?
It is important to know the limits of a given spring before the spring is put into service in an industrial environment. Calculating load and stress is a way to determine the point of failure for a spring, including Belleville … →
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What are DIN specifications?
Deutsches Institut für Normung (DIN) is an international standards organization, based in Germany that governs specifications of many industrial and technical materials. BelleFlex® utilizes the following DIN specifications to guide our design and manufacturing process: Our engineers employ the calculations … →
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What are disc spring tolerances?
The term “tolerance” refers to the amount of deviation from specification that may occur in a disc spring without compromising its performance. For Belleville disc springs, allowable tolerances for diameter, thickness, height, and load are provided in the DIN 2093 … →
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How do you determine fatigue life?
Fatigue life refers to the number of cycles a spring can withstand before it fails in a particular application. The fatigue life is based on the dimensions of the spring or spring stack, the preload, the final load, the deflection, … →
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Materials
How does “working temperature” affect material selection for a Belleville washer or disc spring? Every metal has a “working temperature” range, or the maximum and minimum temperatures at which it will continue to function properly in the working environment. Some … →
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Glossary
1074/1075 High Carbon Steel A malleable, iron-based non-alloyed metal containing carbon, small amounts of manganese, and other elements. The 1075 designation is obsolete, since the acceptable carbon content range for both 1074 and 1075 High Carbon Steel is 0.70%-0.80%. 15-5 … →
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Contact
Accounts Payable ap@belleflex.com Accounts Receivable ar@belleflex.com BelleFlex Credit Application BelleFlex Employment Application
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24/7 Emergency Service
At BelleFlex® we are committed to providing the Belleville disc springs and engineering support that you need to keep your equipment running smoothly. Technical staff members are always available to provide customer support and engineering services. Contact the staff members below for emergency … →
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Privacy Policy
Who we are BelleFlex Technologies, LLC706 Eljer Way, Ford City, PA 16226https://www.belleflex.com What data we collect and why Registration is not required to enter our site. Cookies The BelleFlex Technologies, LLC website does not identify users of this site. However, … →
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