Product Launch Announcement
Zhejiang Weilin Machinery Parts Co., Ltd. (hereinafter "Weilin") announces the official mass production and global availability of the new CAT 3512 Forged Steel Crankshaft (Part No.: 128-6786) , following precision R&D and production line validation. Engineered specifically for the Caterpillar 3512 engine, this product is widely used in large generator sets, marine auxiliary engines, and offshore engineering equipment, marking a significant milestone in Weilin's expansion into high‑power engine crankshaft manufacturing.
Product Highlights: 128-6786 CAT 3512 Crankshaft
Applications
The CAT 3512 is a V‑12, four‑stroke diesel engine with a displacement of 51.8 liters and power ratings from 1,200 to 1,500 HP, commonly found in large ocean‑going vessels, offshore platforms, and data center backup power systems. The 128-6786 forged steel crankshaft serves as the engine's core rotating component, converting reciprocating piston motion into rotational power output.
3512 crankshaft
3512 crankshaft
3512 crankshaft
Core Specifications & Processes
· Manufactured from high‑quality forged steel blanks with precision die forging to ensure complete metal grain flow
· 5‑axis CNC machining centers complete complex surface finishing in a single setup, achieving micron‑level precision for journal roundness and cylindricity
· Controlled‑atmosphere heat treatment combined with patented hardening processes for optimal core toughness and surface wear resistance
· Each crankshaft undergoes high‑precision dynamic balancing testing before shipment, meeting Grade G2.5 or higher balance quality standards
Key Buyer Advantage
As an OEM‑quality aftermarket replacement part, 128-6786 delivers performance comparable to genuine new parts at a significantly lower cost. Weilin offers stable bulk supply and shorter lead times than OEM channels, helping shipowners, power station operators, and aftermarket distributors substantially reduce maintenance costs and inventory pressure. Each crankshaft comes with full quality traceability documentation.
Technical Foundation Behind the New Product
Founded in 2007 with 19 years of dedicated focus on forged steel crankshafts, Weilin is a National High‑Tech Enterprise and host of a provincial‑level High‑Tech Enterprise R&D Center. In late 2025, the company completed the installation and commissioning of a new batch of high‑precision CNC crankshaft machining equipment, specifically targeting large crankshafts like CAT 3512 and CAT 3516 for simultaneous improvements in precision and efficiency, reducing overall machining cycles by an average of approximately 30%.
For the 128-6786 CAT 3512 crankshaft, Weilin has implemented systematic control across the entire process chain – design simulation, precision forging, CNC machining, and dynamic balancing correction – ensuring smooth operation and durability under high‑speed conditions.
Market Fit & Strategic Significance
Weilin's products already cover Europe, the Americas, Southeast Asia, and the Middle East, with deep manufacturing expertise and mature processes in the CAT/KOMATSU aftermarket crankshaft segment. The launch of 128-6786 CAT 3512 crankshaft represents a key milestone in the company's strategic focus on large marine and generator set crankshaft markets.
This new product further enriches Weilin's CAT series high‑power engine crankshaft portfolio, complementing existing CAT C27 and CAT 3412 models to achieve complete coverage. With over 100 types of DCT forged steel crankshafts available, many models are supplied exclusively by Weilin in the entire industry – a testament to Weilin's core strength of "comprehensive and exclusive product range."
"Weilin's goal is not to become the largest crankshaft factory, but to become the world's most comprehensive and fastest‑responding OEM (aftermarket replacement) forged steel crankshaft manufacturer."
3512 crankshaft
3512 crankshaft
3512 crankshaft
Call to Action
We sincerely invite global shipowners, ship repair yards, power station operators, and aftermarket distributors to inquire about the 128-6786 CAT 3512 crankshaft with detailed technical specifications and quotations.
📧 Contact: Please use the contact form on our official website or email us for the complete product catalog
📄 Product Catalog: Covering full series of forged steel crankshafts including CAT C27 crankshaft – available upon request