Efficient Engine Block & Cylinder Head Resurfacing
Designed to rapidly eliminate warpage and uneven surface defects on cylinder heads and engine blocks after overheating. Stepless adjustable table moving speed from 20 to 900 r/min matches both rough stock removal and ultra-fine finishing, restoring strict flatness tolerance without repeated clamping or secondary rework for your engine rebuilding workshop.
Universal Fixture for Gasoline & Diesel Engine Blocks
Comes complete with matched parallel clamps, pressure plates, and balancing frames to securely fix gasoline and diesel engine castings of various sizes. The generous working area covers both light and heavy-duty engine block specifications, making it ideal for aftermarket engine rebuild businesses and engine remanufacturing centers.
High-Power Drive & Variable Speed Grinding
Powered by a 2.2 kW main drive motor paired with a variable 0–960 rpm grinding wheel rotation speed, the surface grinder delivers smooth, high-precision flat surfaces across the full working range. A built-in cooling circulation system suppresses grinding heat to prevent secondary casting deformation, ensuring consistent ultra-smooth finishes during long-hour batch processing.
Large Emery Wheel & Heavy-Duty Construction
A 400 mm emery wheel diameter with 60 mm axial travel handles large cylinder head and block surfaces in fewer passes. The heavy-duty frame with 750 W feed motor provides stable table movement and precise feed control, while dual weight options (2,300–2,900 kg) offer the right configuration for your production volume and workshop layout.
Technical Specifications
| Model | 3M9740 | 3M9740B |
| Max working length | 1,300 mm | 1,500 mm |
| Max working width | 400 mm | 400 mm |
| Max working height | 800 mm | 800 mm |
| Emery wheel diameter | 400 mm | 400 mm |
| Emery wheel travel (axial) | 60 mm | 60 mm |
| Workbench moving speed | 20–900 r/min | 20–900 r/min |
| Grinding wheel speed | 0–960 rpm | 0–960 rpm |
| Main motor power | 2.2 kW | 2.2 kW |
| Feed motor power | 750 W | 750 W |
| Cooling motor power | 40 W | 40 W |
| Power supply | AC 380 V, 3-Phase | AC 380 V, 3-Phase |
| Packing dimensions (L × W × H) | 3,100 × 1,260 × 2,260 mm | 3,400 × 1,260 × 2,260 mm |
| Net weight | 2,300 kg | 2,600 kg |
| Gross weight | 2,600 kg | 2,900 kg |
Product Video
FAQ
1 Why does the 3M9740B combine both grinding and milling in one machine?
The 3M9740B integrates both grinding and milling functions, allowing workshops to process different engine materials with a single machine. Grinding is ideal for cast iron cylinder heads and blocks, while milling provides efficient machining for aluminum components. This dual-process design reduces equipment investment, saves workshop space, and increases machining flexibility.
2 How does the machine deliver a smooth and accurate sealing surface?
The machine uses a ball screw-driven worktable with variable-speed feed control, allowing operators to precisely adjust the cutting speed for different materials and machining requirements. Stable feed movement helps produce a flatter surface finish, improving cylinder head gasket sealing and reducing the risk of coolant or compression leaks after engine rebuilding.
3 Can the 3M9740B machine angled or irregular cylinder head surfaces?
Yes. With dedicated fixtures, the 3M9740B can machine angled cylinder heads, inclined sealing faces, and irregular mating surfaces that cannot be processed efficiently on conventional flat resurfacing machines. This makes it suitable for a wider variety of engine designs and specialized repair applications.
4 Is the 3M9740B suitable for large diesel engine rebuilding?
Absolutely. The machine features an extended spindle travel and a large machining capacity, making it suitable for oversized cylinder blocks and cylinder heads used in heavy-duty trucks, buses, mining equipment, agricultural machinery, marine engines, and industrial diesel engines. It is an excellent choice for workshops servicing large-engine applications.
5 How does the dual-speed spindle improve machining efficiency?
The 3M9740B offers optimized spindle speeds for different machining processes. High-speed milling quickly removes warped material from aluminum components, while precision grinding delivers a fine surface finish on cast iron parts. This combination helps shorten machining time while maintaining excellent resurfacing quality across different engine materials.
6 If the machine breaks down, how do you provide after-sales support? Do you provide operation videos?
Yes. We provide comprehensive after-sales support, including remote technical assistance, online troubleshooting, operation manuals, demonstration videos, maintenance tutorials, and live video guidance. If replacement parts are required, genuine spare parts can be supplied quickly to minimize downtime and keep your machine running efficiently.
7 Can you issue Certificates of Origin (CO), Form A, Form E, or other export documents?
Yes. We can provide the necessary export documents—including Certificates of Origin (CO) and other preferential certificates such as Form E—in accordance with the trade agreements and customs requirements of the destination country. We can also assist you in preparing commercial invoices, packing lists, bills of lading, and other export documentation.
8 What is your minimum order quantity (MOQ)? Do you support OEM & ODM customization?
Our standard MOQ is 1 machine for most models. We also provide OEM and ODM services for distributors and equipment brands, including custom logos, machine colors, nameplates, voltage, packaging, and other specifications to meet your market requirements.
9 Which shipping ports do you use? Can you deliver to my designated warehouse?
We typically ship from major Chinese ports, including Shenzhen, Guangzhou, Ningbo, and Shanghai. We can also arrange delivery to your designated warehouse, freight forwarder, or project site through flexible international shipping solutions.
10 How long does delivery take to my country?
Production typically takes 7–35 days, depending on the machine model and order quantity. Shipping time varies by destination and transportation method. Once your order is confirmed, we will provide a detailed production schedule and estimated delivery time.
