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Dominion Parts
Dominion Parts
A crankshaft is a fundamental and critical component of an internal combustion engine. Its primary function is to convert the reciprocating linear motion of the pistons into rotational motion. This rotational force (torque) is then transmitted through the flywheel and drivetrain to ultimately propel the vehicle or machine.
Manufactured from high-strength forged steel and precision-machined to exacting tolerances, it is engineered for durability, reliability, and optimal performance under extreme conditions.
1. A steel billet is cut and heated to a high temperature until malleable.
2. The hot billet is pressed into a die under immense force to form the rough crankshaft shape.
3. Excess material (flash) is trimmed off, and basic holes may be punched.
4. The forged blank is then cooled, ready for subsequent heat treatment and precision machining.
Inspection: PT detects surface flaws like cracks or porosity. The process involves applying penetrant, removing excess, and applying a developer to reveal defects.
Purpose: This final machining stage achieves exact dimensions and a mirror-like surface finish on the journals and crankpins for optimal performance.
Equipment: A specialized crankshaft grinder and a dedicated fixture are used to hold the part with extreme precision and stability.
Process: A high-speed abrasive grinding wheel removes microscopic amounts of material from the rotating crankshaft to meet tight tolerances.
Outcome: Ensures minimal friction, excellent oil retention, reduced wear, and superior durability.
The crankshaft undergoes dynamic balancing by spinning to measure imbalance, then correcting it by adding or removing weight.
Key Benefits:
Shock Absorption: Thick white cushioning material protects precision-machined surfaces.
Environmental Sealing: Clear plastic film provides a barrier against dust, moisture, and corrosion.
Secure Stabilization: Combined with metal stands to minimize movement.
Safe Handling: Facilitates safer lifting and movement.
| Item | Specification | Unit | Description |
|---|---|---|---|
| 1 | Length | L | Range: >1m |
| 2 | Weight | Kg | Range: >100kg/ Single Piece |
| 3 | Shaft shape | - | Crankshaft |
| 4 | Material | - | Forging Steel 45 or Customized |
| 5 | Heat Treatment | - | Normalizing, Tempering, Induction Harden, etc |
| 6 | Testing | - | UT / MT / PT |
| 7 | Application | - | Marine, Reciprocating Compressor etc |
| 8 | Transport Package | - | Export package (steel frame, wooden box, etc.) |
| 9 | Origin | - | China |
We are a technology and production enterprise specializing in various medium and large-sized precision parts processing. We have our own factory, strictly adhering to national standards. The export rate of the products is over 95%. The production site is strictly managed in accordance with 5S refined norms.
Our main business scope includes marine propulsion systems, white metal bearings, gas reciprocating compressors, steam turbine rotor systems, as well as various types of shafts, gears, rope wheels, sprockets, roller shafts, and other key components.
Our products are precision-engineered for critical applications. Forging billets are made of high-quality steel ingots, ensuring better internal purity, uniformity, and density. Our forgings undergo 100% ultrasonic flaw detection and meet international standards.
Workshop: We utilize a dedicated management software system for full-process Kanban management. Equipped with multiple CNC machining centers, including large-scale 14-meter and 20-meter CNC equipment, we guarantee high product yield rates.
Inspection: Obtained ISO 9001 Quality Management System certification. Our process includes visual checks, dimensional measurements, pneumatic tests, and non-destructive testing (UT and PT) to ensure the highest integrity.
Our customers are distributed over a wide range of areas. Our products are exported to numerous countries, including Russia, Canada, Mexico, Turkey, Saudi Arabia, Korea, Thailand, Brazil, and many others. We have earned strong trust from our global partners.
