STEM is a Company of manufacturer and Sale engine parts for diesel and gasoline engines, including Diesel engine crankshafts and Petrol crankshafts, which are applicable to the marine, generator sets, haulage motors, engineering machinery, truck, bus, and tractor. Commercial vehicles, and cars. More than 800 models of crankshafts are suited for American vehicles, Europe vehicles, and Asia vehicle
We started to export diesel engine crankshafts in 1997. The first crankshaft we developed has exported more than 200,000 pieces which has made us the Excellent Supplier for its flawless craft and Zero-negative feedback during the past 34 years.
Professional team
50+ experts worldwide
Senior project managers effectively control all aspects of the project
7x24 hours service
We provide 7×24 non-stop service to respond to your demands promptly at any time

200
Full-time headcount
10
Technical Engineers
20
Mechanical Engineers
5
R&D Engineers
The area of our workshop is about 6000 square meters containing casting room, machining room and heat treatment room. The techniques of our factory are mature which include: Round Corner Rolling Strengthening, Nitrogen Treatment, Plasma Nitride, Ductile Iron Casting, Austempered Ductile Iron Casting, General Structural Steel Casting and Alloy Casting. Resin Sand-coated Iron Mold and Investment Casting are two main methods of casting in our factory. We have more than 30 years experience of engineering and production.
Our products cover crankshafts for automobile engines, marine engines, construction machinery engines, and had earned good reputation in China and some countries. Now our products have been exported to many countries including Brazil, Egypt, Philippines, UAE, Singapore......We are looking for cooperation with more new partners all over the world.

01
High Quality
Strict quality inspection standards are implemented throughout production to guarantee stable and reliable crankshaft performance for global clients.
02
Advanced Equipment
We adopt modern precision machining and testing equipment to achieve high machining accuracy for all types of crankshaft products.
03
Professional Team
Our experienced engineers and technicians devote themselves to technical solutions and consistent production quality control.
04
Custom Service
We provide flexible customized manufacturing services to meet diverse crankshaft specifications and special requirements of customers.
From technical communication and product customization to logistics arrangement and after-market support, we provide comprehensive support. Our round-the-clock team stands ready to serve you at any time
01
Pre-sale service
We continuously innovate services and explore product applications to elevate your experience, supplying selection guidance, technical support, solutions, sample tests and training
02
In-sales Service
During order execution, we keep timely progress updates, strictly control quality and arrange proper shipment for your crankshaft orders.
03
After-sales service
We supply comprehensive after-sales support including crankshaft files, refund, transit damage compensation and dedicated one-on-one service.
