CS Heavy Forgings is a premier manufacturer and global supplier of high-integrity, heavy-duty Forged Cranks (Square & Round) in India. Engineered to handle extreme mechanical stress, high rotational torques, and rigorous cyclic loading, our custom-forged cranks deliver unparalleled structural continuity and fatigue resistance.
Unlike fabricated or cast alternatives, our open-die and closed-die heavy forging processes refine the internal grain structure of the metal. This ensures that every square and round crank we deliver exhibits superior fracture toughness, minimal micro-porosity, and optimal directional strength for critical industrial applications.
Product Specifications Table
| Parameter | Technical Details & Capabilities |
| Product Category | Forged Cranks (Combined Square & Round Cross-Sections) |
| Material Grades | EN Series (EN8, EN9, EN19, EN24, EN31, etc.), F-Grades, D-Grades, Carbon Steel, & Alloy Steel |
| Diameter / Size Range | 100 MM to 600 MM |
| Thickness Range | 100 MM to 850 MM |
| Single Piece Weight Capacity | Up to 6 Tons (6,000 kg) |
| Surface Finish | Black Forged, Rough Machined, or Proof Machined as per drawing |
| Testing & Compliance | Ultrasonic Testing (UT), Magnetic Particle Inspection (MPI), Destructive Tensile & Hardness Testing |
Why Choose Our Forged Square & Round Cranks?
- Optimized Grain Flow Alignment: Our deep forging technology aligns the metallurgical grain configuration perfectly with the geometry of the eccentric crank. This minimizes the risk of structural failure at critical transition points where the square and round geometries converge.
- Heavy-Duty Load Capacity: With a single-piece weight capacity of up to 6 Tons, our infrastructure is fully equipped to manufacture massive industrial cranks that require exceptional mass-density and cross-sectional strength.
- Custom Dimensional Engineering: We forge cranks with varying combinations of square blocks and round shafts within a size range of 100MM to 600MM and thicknesses reaching up to 850MM, strictly adhering to your custom engineering drawings and technical blueprints.
Premium Material Grades We Process
To match the operational demands of diverse heavy industries, we forge cranks in specialized structural, tool, and constructional steel grades:
- EN Series: High-tensile grades including EN8 for general engineering, EN19 and EN24 for high fatigue resistance, and EN31 for extreme wear applications.
- F-Grades & D-Grades: Forged carbon and alloy steel compositions designed for specialized pressure vessel attachments, high-impact tooling, and corrosive industrial environments.
Cross-Product Synergy (Our Specialized Forging Range)
At CS Heavy Forgings, our manufacturing ecosystem is built to deliver comprehensive heavy engineering components. Alongside our forged cranks, we also manufacture premium-grade Forged Shafts for high-speed rotational equipment, heavy-duty Forged Blocks used in die manufacturing, high-precision Forged Gear Blanks for industrial gearboxes, and seamless Forged Rings for structural support.
Industrial Applications
Our heavy-forged square and round cranks are primary components in high-stress machinery across sectors:
- Reciprocating Pumps & Compressors: For converting rotary motion to linear displacement smoothly.
- Mechanical & Hydraulic Presses: Handling heavy stamping loads in manufacturing plants.
- Marine Propulsion & Large Engines: Driving heavy crankshaft assemblies under cyclic load.
- Steel Rolling Mills & Mining Machinery: Where extreme torque and impact resistances are baseline expectations.
FAQ’s
Forged cranks undergo intense thermomechanical deformation, which eliminates internal voids, gas pockets, and cooling defects common in casting. This results in significantly higher tensile strength, exceptional impact resistance, and superior fatigue life under high cyclic loading conditions.
Yes. We specialize in custom heavy forgings. We manufacture forged cranks according to your precise design parameters, with sizes ranging from 100MM to 600MM, thicknesses up to 850MM, and single-piece weights scaling up to 6 Tons.
All our heavy forgings are subjected to rigorous non-destructive testing (NDT) standards. This includes 100% Ultrasonic Testing (UT) to check for internal flaws, Magnetic Particle Inspection (MPI) for surface cracks, along with standard microstructure and mechanical testing.
For high-torque and fatigue-prone operations, alloy steels like EN19 and EN24 are highly recommended due to their excellent hardenability and toughness. For cost-effective, medium-stress machinery, EN8 or standard carbon steel grades work exceptionally well.