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Flywheels – Single & Dual Mass

We offer both single and dual mass flywheels, specially designed for efficiency and engine compatibility.

AmTech Manufacturing Solutions Guide Options

Our handy solutions guide can help you determine what manufacturing process is right for your project or product.
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Flywheel gear manufacturers | Assembly supplier

Since both flywheel assemblies and flexplate assemblies accomplish the same function and are somewhat similar in appearance, they are often referred to interchangeably, but are in fact two different parts.
Flywheel Ring Gear Assembly
A flywheel gear is used primarily in manual transmissions. It is attached to the engine crankshaft, and holds the ring-gear that is used to crank the engine. The wheel connects directly to the clutch, stores energy to move the vehicle from inertia, and provides a friction surface for the clutch to attach to. Because of this, these parts are usually cast, and are thick and heavy, to allow for the clutch’s surface.

In addition, the heavy weight allows for more inertia once it is spinning.

These parts are manufactured through a casting method, and for now, sand casting is the most common production process for these OEM parts. Depending on the application, the materials used are nodular iron, steel or aluminum. Once cast, the wheel is finished by machining and boring.

Next, a square or rectangular steel bar of a preset length is bent into a circle configuration and the ends welded together, with the major diameter larger than the finished gear size.

The ring is then heated, and either stamped or bored to size on the minor diameter. Next, the gear teeth are hobbed onto the ring, and hardened to improve strength and resistance. Lastly, the ring is shrunk onto the flywheel.

Assembly Applications

When the engine is started, the engine crankshaft turns, and its pinion gear engages with the gear ring of the flywheel assembly to rotate it, in turn rotating the crankshaft on which it is mounted. The rotating crankshaft moves the engine parts through the combustion cycle to start the engine.

Once the engine is running on its own, the weighted and balanced disc of the wheel keeps the crankshaft running smoothly between combustion cycles, preventing the engine from slowing down between piston firings.

Single Mass Flywheel Assembly

The Single Mass version was the original flywheel manufacturer design – later replaced by the popular Dual Mass design. This assembly was created for the high volume passenger car and light commercial vehicle market.

However, manufacturing experts say these complex multi-component units “have been plagued with reliability issues, often failing very early in their life expectancy”. Therefore, Single Mass version are ideal for high mileage vehicle applications.
Single mass flywheel manufacturing

Dual Mass Flywheel Manufacturer

The newer Dual Mass designs are commonly used in a manual transmission’s clutch assembly. This type of assembly helps cushion the shocks associated with the clutch release function. This fly-wheel has a performance feel during the clutch disengagement process and also helps prevent other parts from being damaged during operation vibration shocks.
AmTech OEM - Flywheel ring gear













  • Automotive
  • Construction
  • Electrical
  • Electronics
  • Heavy Equipment
  • Industrial Machinery
  • Marine
  • Medical Devices
  • Off-Highway
  • Pneumatics
  • Robotics


  • Vibration Fatigue Test
  • Bending Fatigue
  • Axial Torision Test
  • Bench Test
  • Impacting Test
  • Speed Blasting Test
  • Inertia Test
  • Casting: Manufacturing, Machining Assembly Capability
  • Ring Gear: Raw Parts Manufacturing, Machining, Hobbing, Heat Treatment
  • Flexible Flywheel Punching, Assembly Capability
  • Mold Design
Dependable Gear Manufacturing

The AmTech Edge in Gearing

AmTech is distinguished by its internationally recognized certifications, extensive expertise, and a comprehensive global manufacturing network, positioning it as a leading choice for specialized gear production.

Specialized Services

AmTech excels in delivering precision-crafted bevel gears, helical gears, plastic gears, ring & pinion sets, spur gears, and worm gears, leveraging advanced investment and die casting techniques, as well as expert machining and forging processes.

Focused Expertise

AmTech is committed to providing top-quality gears, including customized bevel, helical, plastic, ring & pinion, spur, and worm gears, catering to the specific needs of original equipment manufacturer (OEM) partners.

Global Manufacturing Network

Address supply chain complexities confidently with AmTech's integrated and expansive international production network.

Industry Experience

With two decades of specialized experience, AmTech offers unparalleled reliability in OEM gear manufacturing, ensuring premium quality and precision in every product.
AmTech OEM - Flywheel gear
close up of a gear, stainless steel, background, engine background, generative ai, digital illustration.


Your Questions, Answered

If you have a question about our flywheel services that isn’t listed here, please reach out to our expert team to discuss specifics of your project.
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