Forged Flywheel Blanks
A flywheel stores rotational energy, which means it is also storing a great deal of destructive potential if it fails at speed. Soundness is not a quality preference here.
Forged flywheel blanks store rotational energy that rises with the square of speed, making burst failure catastrophic. Forged, fully dense material without internal porosity is used rather than casting, with dynamic balancing after machining.
- Diameter
- 150 mm – 800 mm
- Weight range
- 3 kg – 200 kg
- Materials
- EN8, SAE 1045, EN19
- Balancing
- Dynamic, to specification
- Machining
- Faces, bore, ring gear seat
Forged Flywheel Blanks at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Diameters 150 mm to 800 mm
- Weight 3 kg to 200 kg
- Dynamically balanced after machining
- Forged for freedom from internal porosity
Energy Storage and Burst Risk
Stored energy rises with the square of rotational speed. A flywheel failure at speed releases that energy destructively, which is why forged, fully sound material is used rather than castings with possible internal porosity.
- Energy rises with speed squared
- Burst failure is catastrophic
- Fully dense forged material
- Balanced to specification
Balance and Machining
Residual unbalance at speed generates cyclic bearing loads and vibration. Flywheels are dynamically balanced after machining, with correction by material removal at specified locations.
Flywheel Blank Capability
A flywheel stores rotational energy, and the energy stored rises with the square of speed. That makes a burst failure genuinely destructive rather than merely inconvenient, which is why forged, fully dense material is used in place of castings with possible internal porosity.
| Parameter | Range |
|---|---|
| Diameter | 150 mm – 800 mm |
| Weight range | 3 kg – 200 kg |
| Materials | EN8, SAE 1045, EN19 |
| Balancing | Dynamic, to specification |
| Machining | Faces, bore, ring gear seat |
Balance and the Ring Gear Seat
Residual unbalance at speed generates cyclic bearing loads and vibration that the whole drivetrain feels, so flywheels are dynamically balanced after machining with correction by material removal at specified locations. The ring gear seat is machined concentric with the bore, because a ring gear mounted eccentrically produces intermittent starter engagement and rapid tooth wear on both components.
People also ask
What size flywheel blanks can you forge?
150 mm to 800 mm diameter and 3 kg to 200 kg, in EN8, SAE 1045 and EN19.
Do you machine the ring gear seat?
Yes, the ring gear seat, mounting faces and bore are machined to drawing with concentricity verified.
How is a flywheel balanced?
Dynamically after machining, with correction by drilling or milling material away at specified positions to reach the required residual unbalance.
Topics covered on this page
- flywheel
- flywheel blank
- dynamic balancing
- rotational energy
- burst failure
- ring gear seat
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Why are flywheels forged rather than cast?
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Stored rotational energy makes a burst failure catastrophic, so fully sound forged material without internal porosity is used.
Are flywheels balanced?
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Yes, dynamically balanced after machining with correction by material removal at specified locations.
What sizes do you produce?
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150 mm to 800 mm diameter, 3 kg to 200 kg.